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Head of Supplements
Marketing
Head of Supplements
Marketing
Full Time
Competitive salary
Full Time
Competitive salary
Skills
D2C
Supplements
Blood Diagnostics
Nutrition
Commercial Strategy
Description
We are seeking an experienced, commercially minded Head of Supplements to build and scale a premium blood testing and personalised supplements platform at Third Space.
This is a senior, end‑to‑end role with full ownership of a strategically important growth pillar, combining blood diagnostics, nutritionist‑led interpretation and personalised supplement subscriptions. The role will take the business from concept through to scaled, profitable operation, leveraging Third Space’s trusted brand, affluent member base and deep credibility in performance, recovery and wellbeing.
The opportunity is significant: research highlights strong latent demand and this role will be accountable for realising that potential.
Key Responsibilities
Commercial Leadership & P&L Ownership
Own full P&L responsibility for the supplements and blood testing business, including revenue growth, gross margin, cost control and EBITDA delivery
Define and execute the commercial strategy across supplements, blood testing, nutrition coaching and subscriptions
Build a subscription‑first revenue model, optimising pricing, bundles and retention to drive lifetime value
Set and manage pricing architecture across blood testing packages, consultations and personalised supplement stacks
Identify and unlock incremental revenue opportunities, including add‑on products, expanded ranges and adjacent health categories
Product & Proposition Development
Lead the development of a tiered personalised health ecosystem, combining:
- Health‑goal‑based supplement recommendations
- Optional but differentiated blood testing via trusted lab partners
- Nutritionist‑led interpretation and clear, prioritised guidance
Ensure all products and protocols are evidence‑based, credible and transparent,
Own the core supplement range strategy, initially focused on high‑trust, high‑demand categories (e.g. protein, creatine, electrolytes, multivitamins, omega‑3, magnesium, vitamin D, iron)
Decide where Third Space‑branded products versus selected third‑party products make most commercial and operational sense
Work closely with marketing and nutrition teams to ensure the proposition remains expert‑led and outcomes‑driven
Customer Journey & Experience
Design and optimise the end‑to‑end customer journey, from health goals and lifestyle data capture through to fulfilment and ongoing re‑testing
Ensure blood test results and supplement recommendations are explained in clear, plain language, with prioritised actions members can trust
Embed outcome‑driven retesting (e.g. at 3–6 months) to demonstrate progress and drive subscription retention
Deliver a seamless experience across digital, in‑club and nutritionist touchpoints
Supply Chain, Operations & Compliance
Own supplier strategy, including sourcing, negotiation and performance management across supplements, labs and logistics partners
Oversee manufacturing, inventory planning, warehousing and fulfilment, maintaining a capital‑light operating model
Balance scalability, speed, quality and cost efficiency across the supply chain
Ensure full compliance with all relevant UK regulatory, quality and safety standards for supplements and diagnostics
Growth, Performance & Data
Define and track key performance metrics, including CAC, LTV, conversion, retention, AOV and subscription churn
Use data, experimentation and member insight to continuously refine the proposition and commercial model
Partner with marketing, ecommerce and in‑club teams to drive acquisition, education, conversion and repeat purchase
Apply learnings from Natural Fitness Food and wider member research, particularly around trust, pricing sensitivity and subscription behaviour
Leadership & Cross‑Functional Collaboration
Build and lead a high‑performing supplements and ecommerce team as the business scales
Act as the internal authority on supplements, personalisation and the wider market landscape
Collaborate closely with product, nutrition, marketing, operations and finance teams
Required Experience
Essential
Significant experience in consumer health, supplements, personalised nutrition, ecommerce or adjacent sectors
Proven track record of owning and scaling a P&L in a subscription or repeat‑purchase business
Strong commercial judgement with a data‑driven, test‑and‑learn mindset
Experience managing suppliers, manufacturing, logistics and fulfilment partners
Clear understanding of personalised health, diagnostics or nutrition‑led propositions
Comfortable operating both strategically and hands‑on in a fast‑moving environment
Strong leadership, stakeholder management and communication skills
Desirable
Background in DTC health brands or premium subscription models
Familiarity with UK supplements regulation and quality frameworks
Experience working with nutritionists or practitioners supporting elite or high‑performance populations
What Success Looks Like
A scaled, profitable supplements and blood testing business with strong margins and predictable subscription revenue
Seamless integration between blood diagnostics, nutritionist guidance and personalised supplement plans
High member satisfaction, trust and retention, underpinned by measurable health outcomes
A robust, scalable and compliant supply chain
Third Space positioned as a long‑term health optimisation partner, not just a gym
We are seeking an experienced, commercially minded Head of Supplements to build and scale a premium blood testing and personalised supplements platform at Third Space.
This is a senior, end‑to‑end role with full ownership of a strategically important growth pillar, combining blood diagnostics, nutritionist‑led interpretation and personalised supplement subscriptions. The role will take the business from concept through to scaled, profitable operation, leveraging Third Space’s trusted brand, affluent member base and deep credibility in performance, recovery and wellbeing.
The opportunity is significant: research highlights strong latent demand and this role will be accountable for realising that potential.
Key Responsibilities
Commercial Leadership & P&L Ownership
Own full P&L responsibility for the supplements and blood testing business, including revenue growth, gross margin, cost control and EBITDA delivery
Define and execute the commercial strategy across supplements, blood testing, nutrition coaching and subscriptions
Build a subscription‑first revenue model, optimising pricing, bundles and retention to drive lifetime value
Set and manage pricing architecture across blood testing packages, consultations and personalised supplement stacks
Identify and unlock incremental revenue opportunities, including add‑on products, expanded ranges and adjacent health categories
Product & Proposition Development
Lead the development of a tiered personalised health ecosystem, combining:
- Health‑goal‑based supplement recommendations
- Optional but differentiated blood testing via trusted lab partners
- Nutritionist‑led interpretation and clear, prioritised guidance
Ensure all products and protocols are evidence‑based, credible and transparent,
Own the core supplement range strategy, initially focused on high‑trust, high‑demand categories (e.g. protein, creatine, electrolytes, multivitamins, omega‑3, magnesium, vitamin D, iron)
Decide where Third Space‑branded products versus selected third‑party products make most commercial and operational sense
Work closely with marketing and nutrition teams to ensure the proposition remains expert‑led and outcomes‑driven
Customer Journey & Experience
Design and optimise the end‑to‑end customer journey, from health goals and lifestyle data capture through to fulfilment and ongoing re‑testing
Ensure blood test results and supplement recommendations are explained in clear, plain language, with prioritised actions members can trust
Embed outcome‑driven retesting (e.g. at 3–6 months) to demonstrate progress and drive subscription retention
Deliver a seamless experience across digital, in‑club and nutritionist touchpoints
Supply Chain, Operations & Compliance
Own supplier strategy, including sourcing, negotiation and performance management across supplements, labs and logistics partners
Oversee manufacturing, inventory planning, warehousing and fulfilment, maintaining a capital‑light operating model
Balance scalability, speed, quality and cost efficiency across the supply chain
Ensure full compliance with all relevant UK regulatory, quality and safety standards for supplements and diagnostics
Growth, Performance & Data
Define and track key performance metrics, including CAC, LTV, conversion, retention, AOV and subscription churn
Use data, experimentation and member insight to continuously refine the proposition and commercial model
Partner with marketing, ecommerce and in‑club teams to drive acquisition, education, conversion and repeat purchase
Apply learnings from Natural Fitness Food and wider member research, particularly around trust, pricing sensitivity and subscription behaviour
Leadership & Cross‑Functional Collaboration
Build and lead a high‑performing supplements and ecommerce team as the business scales
Act as the internal authority on supplements, personalisation and the wider market landscape
Collaborate closely with product, nutrition, marketing, operations and finance teams
Required Experience
Essential
Significant experience in consumer health, supplements, personalised nutrition, ecommerce or adjacent sectors
Proven track record of owning and scaling a P&L in a subscription or repeat‑purchase business
Strong commercial judgement with a data‑driven, test‑and‑learn mindset
Experience managing suppliers, manufacturing, logistics and fulfilment partners
Clear understanding of personalised health, diagnostics or nutrition‑led propositions
Comfortable operating both strategically and hands‑on in a fast‑moving environment
Strong leadership, stakeholder management and communication skills
Desirable
Background in DTC health brands or premium subscription models
Familiarity with UK supplements regulation and quality frameworks
Experience working with nutritionists or practitioners supporting elite or high‑performance populations
What Success Looks Like
A scaled, profitable supplements and blood testing business with strong margins and predictable subscription revenue
Seamless integration between blood diagnostics, nutritionist guidance and personalised supplement plans
High member satisfaction, trust and retention, underpinned by measurable health outcomes
A robust, scalable and compliant supply chain
Third Space positioned as a long‑term health optimisation partner, not just a gym
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Head of Supplements
Full Time
Competitive salary
Skills
D2C
Supplements
Blood Diagnostics
Nutrition
Commercial Strategy
2 Golden Square, London W1F 9HR, UK