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The Longevity Nutrient

£22.99

In stock. Next day delivery available.
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Product description

Key Benefits

  • Discover the science and origins of C15:0 in a clear, engaging way.
  • Complex research made simple—understand C15:0’s role in your diet.
  • Practical tips to help you add C15:0 to your everyday meals.


Start your journey with The Longevity Nutrient, where Dr. Stephanie Venn-Watson shares the fascinating discovery of C15:0—a unique fatty acid found through research on healthy ageing dolphins. This book brings the science of C15:0 to life, making it easy to see how this essential fat could fit into your lifestyle. With a blend of storytelling and research, Dr. Venn-Watson challenges old nutrition myths and highlights why C15:0 deserves a place at your table.

Whether you’re curious about the latest in nutrition or looking for new ways to support your wellbeing, The Longevity Nutrient offers practical guidance for adding C15:0 to your diet, all backed by science and real-world insights.

Why Fatty15 is Healf
Fatty15 was founded by Dr. Stephanie Venn-Watson and Dr. Eric Venn-Watson, whose backgrounds in veterinary epidemiology, public health, and military medicine inspired a new approach to wellness. Their work with marine mammals led to the discovery of fatty acid C15:0 (FA15™), which became the foundation of the brand’s innovation. Built on scientific research and a shared vision for progress, Fatty15 reflects a commitment to bridging science and everyday wellbeing.

With our Healf Curation Process, we do the work for you. Shop with confidence knowing that every item has been tried, tested, and curated for you.

Learn more about each step—Brand Discovery, Expert Validation, and Community Testing—here.

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Frequently asked questions

How do we curate our products?

Every product undergoes our Healf Curation Process. With it, you can shop confidently knowing that every item has been tried and tested before it reaches you. Our Healf Curation Process includes three key steps: Brand Discovery, Expert Validation, and Community Testing. Through these, we assess quality, ingredients, effectiveness, and more, ensuring that every product empowers your wellbeing.

Do you have resources on how to enhance wellbeing?

The Healf Source offers detailed insights into different aspects of wellbeing, as well as guidance, research, recipes, and more to help you invest in your personal wellbeing journey. You can also subscribe to our weekly newsletters for the latest updates at Healf and in the wellbeing industry. Subscribe via the sign-up block at the bottom of this page.


How can I find out more about the ingredients in a product?

We love people who check ingredients as carefully as we do, so you'll find detailed information about the ingredients used on every product page (where applicable). If you see something you'd like to flag with us or have additional questions, please don't hesitate to get in touch—we'd love to hear from you.

Healf Curation Process™

Every product undergoes our rigorous Healf Curation Process, ensuring you are always getting the best when it comes to your wellbeing.