Careers

A truly excellent opportunity to work for the UK’s No.1 largest and fastest growing vitamin supplement company, which has helped define the VMS sector with leading brands such as Perfectil, Pregnacare, Wellman and Wellwoman. Vitabiotics is the first and only vitamin company to receive The Queen’s Award for Innovation in vitamin research in two occasions.

You will be promoting our leading brands, in the main pharmacies based in London, providing great advice, customer care and assistance on the busy shop floor, while acting as a key support to the healthcare management team in store.

Monday to Friday job (10 am - 6.30 pm)

Experience

To be successful in this role you will need some previous experience as retail level brand ambassador and/or sales assistant/customer care (at least 2 years), be a confident seller and have a passion for the world of healthcare and vitamins. You will also be a great 'people person’, with a patient and understanding nature, ability to work under pressure in a busy store environment and good customer care skills.

Specific skills required

• Good knowledge of Office package (in particular Excel and Word)
• Excellent customer service
• Confident in selling in healthcare environment
• Positive, helpful attitude

You are an experienced front-end developer looking to play a key role in growing the DTC business of the UK’s number one vitamin company. Built on Shopify, our website is the key pillar of our ambitious global e-commerce growth plans. We are looking for a Front-end Developer to join our Digital team and help deliver our e-commerce development roadmap. You are a whizz with HTML, CSS & JavaScript and have experience of working with Shopify. Highly self-motivated, you are able to work independently and multi-task with ease. You want a role where you can have a real impact on the growth of the business. 

About Vitabiotics

We are the UK’s favourite vitamins, helping millions of people to be at their best with easy-yet-effective nutritional support. Our famous, market-leading brands include Pregnacare, Wellman, Wellwoman, Perfectil and Feroglobin. We are in a period of rapid e-commerce growth and are looking for a Digital Design Manager to help elevate our digital creative output.

Key Tasks

• Work with Digital Designers to build, test and deploy new web pages
• Support with ongoing website maintenance and updates
• Work with SEO Manager to optimise website performance and speed

Essential

• 5+ years experience in front-end development
• Strong skills in JavaScript, HTML and CSS 
• Familiarity with browser testing and debugging
• Good understanding of layout aesthetics 
• Able to demonstrate examples of previous work (e.g. portfolio)  
• Razor-sharp attention to detail
• Growth-minded - always looking to looking to learn and improve 
• Comfortable working within a small team in a fast-paced environment - you will be the only front-end developer

Desirable

• Experience with Shopify and Liquid Language programming  
• Foundational knowledge of SEO principles
• BSc degree in Computer Science or relevant field

We are looking for a PR Executive to work at our Head Office near Staples Corner. In 2013 Vitabiotics became the first Company to receive a Queen's Award for Innovation in vitamin research, and now is an exciting time to join us as we extend into a number of new categories. If you've had agency or in-house PR experience, we would love to hear from you. Ideally you will have experience in the consumer healthcare market, but more importantly you will be hard working and ambitious with a positive can-do attitude and proactive approach to the wide and varied role.

Key Skills and Abilities:

• Strong organisational skills
• A positive and ‘can-do’ attitude
• A keen interest in the health and wellbeing industry (preferable but not required: strong knowledge of the media and influencer landscap)
• Willing to go the extra mile in a fast-paced environment and do what it takes to get the job done
• Ability to work across different brands and projects and with various agencies and suppliers
• Creative and quick thinking, with an excellent attention to detail
• Calm and considered under pressure
• Fantastic written and verbal communication skills
• Takes initiative and communicates clearly and efficiently with internal and external key stake holders

Key Responsibilities Include:

• Drafting press releases and creative pitches
• Proactive media relations –handling press enquiries proactively, quickly and with attention to detail
• Monitoring and saving editorial coverage and regularly informing relevant teams of coverage
• Supporting on creative mailers and mass mail outs
• Admin support including post, reports, stock management and deliveries
• Supporting at exhibitions and events

Vitabiotics is the UK’s No.1 largest and fastest growing vitamin supplement company, which has helped define the VMS sector with leading brands such as Perfectil, Pregnacare, Wellman and Wellwoman.

We are currently looking for a E-Commerce Team Leader to join our busy team in our Warehouse. The main tasks for this role are:

Responsibilities:

• Monitor and supervise the e-commerce warehouse team daily to ensure tasks are being completed efficiently.
• Replenish and monitor inventory levels in E-commerce picking area.
• Set and evaluate KPI’s for picking, packing and daily order volumes.
• Re-order packaging and postage materials
• Ensuring sufficient manpower to meet daily e-commerce order volume and fluctuations.
• Training new staff.
• Liaising with local and international courier providers for collection of orders and negotiating volume rates.
• Carrying out inventory checks & cycle counts.
• Implementing new warehouse automation initiatives.
• Introduce systems to reduce packing/picking errors.
• Coordinating with other departments regarding day-to-day activities.
• Ensuring health and safety and social distancing procedures are upheld at all times.

Person Specification:

The successful candidate is likely to meet all of the following criteria:

• Excellent communication and administrative skills.
• Have good people and leadership skills to successfully lead a team.
• Have previous warehouse supervisory experience, ideally in e-commerce.
• Experience using warehouse systems, preferably SAP and scanning systems.

You are a senior-interactive art director level creative looking to ‘own your own thing’. This is a major role in charge of the creative look and feel for the UK’s most popular vitamin brand, across all the digital touchpoints. With a background in agency creative or client-side e-commerce creative, you are a hands-on, but creatively led individual who is confident developing and selling-in your creative ideas to the CEO and SVP, and then able to get on and produce the agreed output with your team.

About Vitabiotics

We are the UK’s favourite vitamins, helping millions of people to be at their best with easy-yet-effective nutritional support. Our famous, market-leading brands include Pregnacare, Wellman, Wellwoman, Perfectil and Feroglobin. We are in a period of rapid e-commerce growth and are looking for a Digital Design Manager to help elevate our digital creative output.

Key Tasks

• Elevate design of digital creative output to drive improved engagement and commercial performance
• Responsible for the timely production and delivery of all digital assets, across website, photography, display ads and email (plus some social)
• Develop creative concepts for digital campaigns and new product launches
• Work with Senior Performance Marketing Manager to optimise website design and user-experience to increase conversion rate
• Work with content exec and developer to implement the design, including testing and visual QA of the builds
• Work with Senior Performance Marketing Manager to produce highly-effective digital ads
• Work with Marketing & Sales teams to produce digital creative for partners
• Manage & develop two digital designers

Essential

• Proven experience in e-commerce interaction design
• Proven experience developing campaigns across digital touchpoints
• Best in class Photoshop and graphic design skills
• Knowledge of HTML & CSS
• Experience with animation and using After Effects
• Customer-centric but revenue-driven mentality
• Razor-sharp attention to detail
• Growth-minded - always looking to looking to learn and improve
• Comfortable working within a small team in a fast-paced environment
• Excellent verbal and written communication skills
• Solid understanding of UX design principles - this is not a UX design role but requires knowledge of designing to positively influence user-journeys
• Experience developing junior staff

Desirable

• Has worked with Shopify

Vitabiotics is a family business, founded over 45 years ago. We are the UK’s No.1 vitamin supplements company, helping to define the sector with leading brands such as Perfectil, Pregnacare, Wellman and Wellwoman.

We are looking for an enthusiastic science graduate to work with our in-house Technical & Quality Control Department.

Key Responsibilities:

• Handling Technical Product Data, e.g. Clinical and Pharmacological Information
• Working on standard operating procedures of the Quality Control Dept
• Involved in analytical method developments
• Validation of Production & QC methods
• Quality Control, Customer and Regulatory Issues
• Handling New Product Development (NPD) projects.

The ideal candidate:

• Highly organised
• Accurate with good computer skills and good written and verbal communication skills
• Pharmacy or biosciences postgraduate background ideal.
• Quality Control experience and some experience in pharmaceutical registrations preferred but not essential.

Vitabiotics is a family business, founded over 45 years ago. We are the UK’s No.1 vitamin supplements company, helping to define the sector with leading brands such as Perfectil, Pregnacare, Wellman and Wellwoman.

We are looking for an enthusiastic science graduate to work with our in-house Technical & Quality Control Department.

Key Responsibilities:

• Resolve and answer any scientific/technical queries from customers
• Deal with any technical complaints
• Handling Technical Product Data, e.g. Clinical and Pharmacological Information
• Working on standard operating procedures of the Quality Control Dept
• Involved in analytical method developments
• Validation of Production & QC methods
• Quality Control, Customer and Regulatory Issues
• Handling New Product Development (NPD) projects.
• Liaise with Internal departments and external organisations to acquire information that is needed

The ideal candidate:

• Pharmacy or biosciences postgraduate background ideal.
• Highly organised
• Be empathetic and able to communicate well on technical issues
• Be flexible and responsive
• Accurate with good computer skills and good written and verbal communication skills
• Quality Control experience and some experience in pharmaceutical registrations preferred but not essential.

You are a junior digital designer who ‘gets’ creativity AND process. You like to explore new ways of communicating with users through your craft, can take a general ‘direction’ and bring it fully to life to meet both business requirements and inspire a consumer to action. You will have an extremely good working knowledge of Adobe programmes.  

About Vitabiotics

We are the UK’s favourite vitamins, helping millions of people to be at their best with easy-yet-effective nutritional support. Our famous, market-leading brands include Pregnacare, Wellman, Wellwoman, Perfectil and Feroglobin. We are in a period of rapid e-commerce growth and are looking for a Junior Digital Designer to help us on our journey.

Key Tasks 

• Responsible for rolling out creative ideas developed with the Digital Design Manager and Head of Digital
• You will be designing across a variety of digital platforms – website, admedia banners, email newsletters and social content 
• Responsible for designing and building display advertising across various advertising and partner websites 
• Works with Marketing and Sales team to draw in and understand upcoming graphic design requirements 

Essential 

• Excellent image composition and typography skills demonstrated in work that shows balance and flow across a digital design 
• Proven experience with image editing  
• Understanding of web coding - CSS, HTML, and JavaScript (being able to code is not a requirement) 
• Best in class Photoshop and graphic design skills 
• Excellent verbal and written communication skills 
• Growth-minded - always looking to looking to learn and improve 
• Comfortable prototyping ideas on paper  
• Qualification in design (degree level or equivalent) 
• Expert level knowledge required: Photoshop, Illustrator 
• Razor-sharp attention to detail
• Good to have (not essential): After Effects, Google Web Designer, Adobe XD

Vitabiotics, 4 times winner of Queen’s Awards for Enterprise, is widely regarded as the most innovative and fastest growing major vitamin supplement company in the UK.

As Britain's leading vitamin company for specific life stages, Vitabiotics has helped define the VMS sector with leading brands such as Osteocare®, Perfectil®, Pregnacare®, Wellman® and Wellwoman.

We are currently looking for a Shipping Assistant to join our Shipping Department. 

Key responsibilities:

The Shipping Assistant will be responsible for providing efficient administrative and clerical support to the Import and Export teams which includes:

• Producing and checking essential shipping documentation required by customers and suppliers, including customs documentation
• Updating and maintaining accurate shipping information in our Freight software database
• Assisting with transport arrangements by sea, air and road
• Dealing with customers enquiries relating to orders, shipments and deliveries
• Providing excellent customer service
• Undertaking various other administrative duties

• Responsible for the input of export customs entries in SAP (training will be provided).
• Liaising with customers and overseas agents
• Providing Liaison between the company, Air / Sea Carrier and HMRC (when required).

You will need: 

• Previous administrative experience in the shipping & logistics sector.
• Good knowledge of SAP will be an advantage.
• Good knowledge of export documentation
• High level of speed and accuracy with excellent attention to detail
• Good computer skills and competent with Microsoft Word and Excel
• Excellent interpersonal and communication skills

Vitabiotics, 4 times winner of Queen’s Awards for Enterprise, is widely regarded as the most innovative and fastest growing major vitamin supplement company in the UK. As Britain's No1 vitamin company for specific life stages, Vitabiotics has helped define the VMS sector with leading brands such as Osteocare®, Perfectil®, Pregnacare®, Wellman® and Wellwoman.

We are currently looking for an IT Network Manager to join our small IT team in North West London.

Responsibilities:

• Installing and maintaining the company’s computer network, firewall, etc.
• Coordinates IT support, training, and orientation for new technology users.
• Develops emergency plans for equipment, power, or security failure to preserve technology and data.
• Researches and stays up to date regarding new IT equipment and solutions.
• Identify problematic areas and implement strategic solutions in time.
• Audit systems and assess their outcomes.
• Maintain ISO 27001 and GDPR status and identify other regulatory laws pertaining to IT.
• Preserve assets, information security and control structures.
• Register and maintain domains for Vitabiotics and export agents.
  
  

Skills/experience required:

• Bachelor’s Degree in Computer Science or a Related Field
• Great IT skills combined with a good head for business.
• IT relevant qualifications such CISSP, ITIL, CISM
• At least 5+ years’ experience in senior IT role
• Ability to be 1^st to 3^rd line support when required.
• Experience managing large projects such as software rollouts and upgrades.
• IT background in manufacturing and warehouse would be beneficial.
• You will be managing a Microsoft/Mac environment consisting of Windows 10, macOS, Apple devices, Server 2012 - 2019, MS365 and Azure, Hyper-V, HP Servers etc so similar experience is
• You should have a solid knowledge in Networks, Network security and IT problem solving.
• Be well versed with CRM, ERP and ideally SAP B1 systems.

You must be customer focused and a good communicator. The role is likely to involve some late hours / weekend work during busy times, so you need to be flexible.  There are plenty of exciting projects to work on and is a great opportunity for someone who is looking for their first management role. It offers the chance to work for a well-known company, putting your own stamp on the department and making notable positive changes to support the organisation as a whole.

Vitabiotics, 4 times winner of Queen’s Awards for Enterprise, is widely regarded as the most innovative and fastest growing major vitamin supplement company in the UK. As Britain's largest vitamin company, Vitabiotics has helped define the VMS sector with leading brands such as Osteocare®, Perfectil®, Pregnacare®, Wellman® and Wellwoman.

This is a fantastic opportunity within our National Accounts department for a Junior Retail Sales Analyst to join a fast growing, category leading company working with some of the UK’s largest retailers including; Boots, Tesco, Holland & Barrett, Sainsbury’s, Superdrug, Asda and Amazon.

Key responsibilities:

• Assisting National Accounts team with new product set-up
• Assisting with promotional activity set-up and evaluation
• Retailer project administration
• Product sampling
• Invoice logging/monitoring
• Other general departmental duties.

There is excellent opportunity for career progression for the right candidate.

Experience:

• Any experience of working in either a major UK retailer head office or for a branded supplier to retail chains would be preferable.
• Excellent literacy and numeracy essential
• MS Excel and Word proficient
• MS Powerpoint basic

Vitabiotics, winner of The Queen’s Awards for Enterprise in International trade is one of the most dynamic and fastest growing major vitamin companies in the UK and internationally with exports to over 100 countries. Our leading brands include Perfectil, Osteocare^®, Pregnacare^®, Wellwoman and Wellman^®.

Our expanding Warehouse Department is seeking a motivated Picker to perform various warehouse tasks. These include:

Key responsibilities:

• Picking and packing customer goods and orders
• Stock replenishment
• Reporting any damaged items to your team leader
• Ensuring you maintain our high standard of health and safety
• Take responsibility for working through your orders independently

You must have:

• Good written and verbal communication skills
• Previous warehouse experience
• Experience working within a fast paced environment
• Knowledge of Microsoft Excel, Outlook and Word
• Good timekeeping

Are you a recent graduate who has had experience in 1st/2nd line support? Are you someone who wants a challenge and learn from a team of experienced IT professionals? 

We have a position available for you to take the next step in becoming a System Administrator where you will be part of a team managing a Mac OS and Windows infrastructure and Netgear/Juniper network who have also moved into Office 365 and SharePoint online and Azure. 

Having a solid understanding of Windows and network security for this position with experience in troubleshooting would be great but you will also learn a lot on the job. 

This position will allow you to gain exposure to a large and growing network whilst being part of a team allowing your future IT career.

Your principle duties will include but not limited to:

• To provide 1st/2nd line support to users in the business via phone, email and remote connections
• To provide support when technicians are on annual leave, busy or when required to as per the requirements of the business.
• Administration and support of Network Devices
• Administration and support of Windows Server 2008/2016
• Administration and support of Microsoft Exchange server 2010
• Administration and support of phone systems
• Liaise with 3rd parties when required
• Input into ad-hoc projects when required
• Hardware/Software fault finding and resolution
• System builds/software installations and configuration
• Help ensure the company’s systems align with industry related accreditations such as ISO27001 and Cyber Essentials certification’ and any other regulations such as GDPR.

Desirable Skills / Personal Qualities

Looking for someone who has:

• A passion for IT
• An IT related degree or diploma or any other IT professional qualifications
• Excellent communication skills
• A people’s person attitude/approach
• Good problem solving skills/experience

Job Description

A truly excellent opportunity to work in a newly created role for the UK’s No.1 largest and fastest growing vitamin supplement company, which has helped define the VMS sector with leading brands such as Perfectil, Pregnacare, Wellman and Wellwoman. Vitabiotics is the first and only vitamin company to receive The Queen’s Award for Innovation in vitamin research. You will be working on a diverse range of digital and social media projects as we increase our focus in this area.

This is a key role in the Vitabiotics marketing team, reporting to the Senior Marketing Manager. You are a junior/mid level marketing professional, with a strong understanding and passion for consumer brands.  You will be part of a small and focussed marketing team, with opportunities to make your mark on the UK’s most popular vitamin brands. The company runs a high number of campaigns and has ambitious growth plans, you will be comfortable working at speed and identifying and delivering commercial solutions.

Key Tasks

• Support a wide range of ATL and BTL marketing activities, including high profile advertising e.g. TV, print and outdoor, to build brand awareness and drive sales performance for some of the UK’s leading supplement brands
• Responsible for developing and maintaining brand assets and promotional materials to be up to date and complaint with industry regulation for newly developed and existing products  e.g. pack and web copy, brand plans, consumer leaflets and scientific product dossiers
• Management of key campaigns e.g. sampling, BTL communications
• Brief internal teams on brand plans and campaign requirements e.g. design, digital, social media
• Build relationships and act as key contact with external stakeholders for relevant brands e.g.  third party suppliers and charity partners
• Assist in the organisation of internal and external marketing events
• Prepare brand presentations for sales and export stakeholders
• Complete special projects and participate in project teams as agreed and/or directed
• Ensure cost effective campaigns negotiated and delivered
• Maintain a record of expenditure ensuring campaigns are completed within budget
• Ongoing competitor monitoring

Essential

• Educated to degree level
• 2-3 years marketing experience
• MS Office (Excel, Powerpoint, Word) to intermediate level

• Excellent attention to detail
• Good consumer and technical writing skills
• Ability to manage multiple projects and deadlines
• Proactive, personable, positive, highly organised, resilient, flexible and embraces change
• Comfortable working within a small team in a hands on, fast-paced environment

Desirable

• Degree in a marketing or scientific discipline
• Knowledge of the VMS or healthcare industry
• Interest in healthcare

The UK’s fastest growing vitamin company, Vitabiotics, is one of the most dynamic companies in the UK. They have helped define the Vitamins and Minerals (VMS) sector with leading brands such as Osteocare, Pregnacare, Perfectil and Wellwoman to name a few.

We are currently looking for a Demand and Supply Planner to join our team!

Day-to-day, you’ll take charge of planning and organizing the supply of our products through optimizing inventory levels for both Finished and bulk products, advising on production requirements and ensuring we keep a 'customer-first’ approach at all times by sharing valuable business insights.

Your role will lean heavily on your excellent data and reconciliation skills, analyzing past performance, monitor and communicate the reliability of product availability with all relevant stakeholders.

Key responsibilities include:

• Updating forward forecasts on a rolling 12-month horizon for all products, creating scenarios and arbitrating the best fit taking in to account marketing plan and supply issues
• Supplying Performance Management to agreed KPI's
• Ensuring that customer service levels are achieved through the timely receipt of finished product (OTIF)
• Establishing and maintaining accurate inventory data
  - Accurate Raw Materials stock figures
  - Accurate FG stock figures
• Improving business processes to ensure timely:
  - receipt of raw materials to either UK warehouse or contract manufacturers
  - issue of raw materials to contracted production partners
  - receipt of finished goods to UK warehouse to meet customer demands
• Developing and maintaining appropriate Supply Chain/Logistics KPIs
• Ensuring all relevant systems are maintained to support the business effectively

You will need:

• Experience with using SAP Business-1
• At least 2 years experience in a Demand and Supply Planning role

Job Description

Vitabiotics is a family business, founded over 45 years ago. We are the UK’s No.1 vitamin supplements company, helping to define the sector with leading brands such as Perfectil, Pregnacare, Wellman and Wellwoman.

This is an exciting opportunity to work within an in-house design department of a leading health supplements company.

You will be working on a diverse range of print projects, principally focussed on packaging, TTL advertising (B2C and B2B publications, consumer press and outdoor), in-store POS, leaflets and brochures.

Key attributes:

• Strong creative design skills
• Fluent in Photoshop, InDesign and Illustrator Creative Cloud on Mac OSX
• Technical repro knowledge
• Excellent artworking and retouching skills
• Taking projects from initial layout through final artwork to proof checking and approval
• Excellent written English
• Proof-reading skills
• Meticulous attention to detail

Application

CV and portfolio (as either PDF or web URL) are required. Please send to jobsuk@vitabiotics.com

Location: NW2 7HF, London (nr. Staples Corner) - applicants must be within 40mins of NW2 office

Experience: As above in the description

Qualification: As above in the description

Job Description

Vitabiotics, 4 times winner of Queen’s Awards for Excellence, is widely regarded as the most innovative and fastest growing major vitamin supplement company in the UK. As Britain's No1 vitamin company for specific life stages, Vitabiotics has helped define the VMS sector with leading brands such as Perfectil^®, Pregnacare^®, Wellman^® and Wellwoman.

This is an exciting opportunity for an ambitious, dynamic and experienced individual to work with the senior management team.  This is a high profile ‘customer facing’ position. 

Your role will be to develop and drive forward the national account and multiple pharmacy retail business, in collaboration with many of the UK’s most prestigious nutritional Highstreet retailers.

Key responsibilities:

• Strategic management of some of VB’s largest customers
• Key account / new business development
• Day to day management of key account issues and joint business plans
• Oversee sales promotional strategies for each national account, across all brands including negotiating annual budgets.
• Negotiating any listings fees/exclusivity.
• Arrange regular review meetings
• Ensure all aspects of promotional planning are implemented effectively, according to budget and Vitabiotics above the line marketing
• Work with logistics department of VB and national accounts to assess their requirements and ensure smooth supply chain and deliveries.
• Create and provide forecasting and sales analysis to logistics department of VB and national accounts
• Negotiating margins, price increases and shelf positioning with national accounts.
• Monitor performance against agreed ongoing sales and distribution targets.
• Support brand image and values in store.
• Ensure successful launch of new products into all national accounts.

The Successful candidate must:

• Be educated to a degree level
• Have a minimum of 5 years’ experience handling national accounts in the multiple pharmacy and multiple grocery sectors
• Have strong negotiation skills
• Have knowledge/experience of supply chain management
• Have a full driving licence

Hours: 9am-6pm, Monday-Friday (flexibility is essential)

Benefits: 24 days holiday, contributory pension, private health cover, personal bonus scheme, company car

Experience: As above in the description

Qualification: Be educated to a degree level

STRICTLY NO AGENCIES

Apply with CV and covering letter and evidence of eligibility to work in the UK 

Job Description

Vitabiotics, 4 times winner of Queen’s Awards for Excellence, is widely regarded as the most innovative and fastest growing major vitamin supplement company in the UK. As Britain's No1 vitamin company for specific life stages, Vitabiotics has helped define the VMS sector with leading brands such as Osteocare^®, Perfectil^®, Pregnacare^®, Wellman^® and Wellwoman.

We are currently looking for an enthusiastic and well-experienced Forklift Driver to join our Warehouse Department.

Key responsibilities:

• Maintain Health and Safety, Quality and Hygiene guidelines.
• Carry out pick, pack tasks, in all areas using RF handheld devices from Reach FLT’s
• Ensure that personal and warehouse targets are achieved as well as meeting customer’s requirements and maintaining quality standards.
• Load / unload and put away.
• Take part in daily stock checks/investigations.
• Communicate effectively to enable other warehouse staff to carry out their job.

The successful candidate must have:

• 2 years+ Forklift driving experience
• Possession of a Forklift licence (Reach and Counterbalance)
• Thorough knowledge and experience of warehouse stock control
• Good communication and computer skills

Please apply by sending your CV to jobsuk@vitabiotics.com

Location: Hemel Hempstead

Experience: As above in the description

Qualification: As above in the description

STRICTLY NO AGENCIES

Apply with CV and covering letter and evidence of eligibility to work in the UK