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4946 Reviews

C15:0 for a Healthier Body and Mind

C15:0 is an essential fatty acid that your body needs to stay healthy, especially as you age. Fatty15 is a science-backed, patented, award-winning, pure and vegan-friendly C15:0 supplement to support your long-term health and wellness.

Fatty15 promotes healthy metabolism, balanced immunity, gut health and heart health. 2 out of 3 customers report near-term benefits, including calmer mood, deeper sleep or less snacking, within 6 weeks. Learn more

Note: After your initial kit, all subscription refills will ship every 90 days at $119.95.

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90 Day Starter Kit

with 90-day Subscription

Save 20%
$119.95
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30 Day Trial Kit

with 90-day Subscription

$49.95
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90 Day Starter Kit

without Subscription

$149.95
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Annual Supply Kit

12 month Supply Kit

Save $140
$459.95

90 Day Starter Kit

with 90-day Subscription

Save 20%

Delivered quarterly

to your door.

Cancel anytime,

no hassle

Free shipping

for every U.S. order.

All the good stuff

Promotes stronger and more energized cells, so you feel healthier and age smarter.

All the good stuff

Promotes stronger and more energized cells, so you feel healthier and age smarter.

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    Healthier Cells

    More energy & healthier skin*

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    Healthier Body

    Better metabolic, heart, liver, gut & immune health*

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    Healthier Mind

    Calmer mood, deeper sleep & less snacking*

What the scientific community is saying

What the scientific community is saying

"The sickest dolphins had lower levels of a fatty acid known as C15:0, or pentadecanoic acid. Found in certain fish and plants, as well as milk and butter, it is believed to improve immune function and strengthen heart health. Some experts hail the substance as even having anti-aging properties."
- Ariana Eunjung Cha, The Washington Post

"What began as a passion for working with animals has resulted in an entrepreneurial journey of taking the science from the bay to the lab...and developing a product that people can take to improve health on a cellular level."
- Monica Haider, Forbes

"When Dr. Stephanie Venn-Watson started studying dolphins at the US Navy's marine mammal program, she wasn't expecting to turn the food pyramid on its head."
- Jessica Rendall, C|NET

"As for the future, Venn-Watson and her team had discovered about 100 molecules naturally present in the serum of both dolphins and humans, that looked like they could protect against the onset of aging-related diseases, so it is very possible we will see more to come from her team. But presently, this discovery of a new [essential] fatty acid is incredibly remarkable."
- Micki Wagner, Worth

"A new study, published by PLOS One, shows that an odd-chain saturated fat, called Pentadecanoic acid (C:15:0), may be healthier, safer, and more effective for supporting cellular health than the leading omega-3 fatty acid, eicosapentaenoic acid (EPA)."
- Sebastian Krawiec, Nutritional Outlook

"For decades there has been a war on fats such as butter, whole milk, and cheese. But for the first time in 90 years, a San Diego company made an amazing discovery of a new fat, present in butter, and one your body desperately needs."
– Steve Atkinson, KGTV ABC10 News

“In tests, daily oral supplementation with pure C15:0 for approximately 12 weeks supported healthier cholesterol and glucose homeostasis in obesity models and advanced hepatic form and vitality in liver disease models.”
– Vegconomist

"Similar to omega-3 fatty acids, Fatty15 is meant to boost immune and metabolic health, but without the fishy-smell omega-3 vitamins are known for."
- Alex Bitter and Ellen Thomas, Business Insider

“The growing recognition of C15:0 as an essential fatty acid, which now has evidence of being better, broader and safer than the purest, highest performing omega 3, provides a new option for consumers.”
- Nicole Kerr, NutritionInsight

“Known as pentadecanoic acid, or C15:0, the dietary saturated fat found in milk, butter, fish, plants and other foods was shown in studies to demonstrate broad health benefits. It would join omega-3 and omega-6 as the only fatty acids considered by nutrition scientists as essential.”
– Christopher Doering, FoodDive

“This discovery [by Seraphina Therapeutics] may elevate C15:0 to the ranks of now hallowed essential fatty acids omega-3 and omega-6 as well as usher in a new dialogue on changing the global guidelines for intake of dietary saturated fatty acids.”
– Karen Raterman, New Nutrition Business

What's it like to get wiser against age?

Read the reviews:

Asked, and answered.

Because scientists seriously love questions.

  • What is fatty15?

    Fatty15 is a once daily oral supplement working to counter age-related breakdown, including strengthening cell membranes, keeping mitochondria working, and advancing cellular homeostasis.* Fatty15 contains one ingredient - pure pentadecanoic acid (C15:0).

  • What is C15:0?

    C15:0 is an odd-chain saturated fatty acid present in trace levels in whole fat dairy products and some plants and fish. A growing body of scientific evidence supports that C15:0 is the first essential fatty acid to be discovered in 90 years (there are only two other essential fatty acids, one omega-3 and one omega-6 fatty acid).† “Essential fatty acids” are nutrients that our bodies don’t make but are necessary to maintain physiological health. As such, our primary sources of essential fatty acids are food and dietary supplements.  Fatty15 offers an easy way for people to meet their essential C15:0 needs, every day.*

  • What is the benefit of taking fatty15 over just eating more dairy fat (which contains C15:0)?

    While whole-fat dairy products contain trace amounts of C15:0 (our good saturated fat), these foods also contain much higher amounts of bad saturated fats (like, C16:0) that are associated with negative health effects.* In addition, unlike dairy products, fatty15 contains pure, vegan-friendly, non-dairy, and lactose-free C15:0.

  • How long before fatty15 starts working?

    Our studies support that fatty15 starts working between 1 to 3 months of once-daily oral supplement-taking. This is why our recommended starter kit has a 90 day (3 month) supply.

  • Can I take fatty15 with other vitamins and supplements?

    Fatty15 was developed to complement your diet and current health regime. To date, no specific contraindications between fatty15 and other supplements or vitamins have been identified. Your health is our top priority, and we encourage you to talk with your healthcare provider before beginning any supplement regimen.

  • Are fatty15 supplements vegan?

    Yes, they are vegan-friendly. In addition to being vegan, our product is dairy-free, gluten-free, and in the purest form. Free of preservatives, fillers, oil, animal byproducts, corn, soy, and artificial colors.

  • Is fatty15 and its packaging environmentally friendly?

    Yes! Our top two priorities are your health and the health of the Earth. From our ingredient, to your refillable glass bottle, and even to the package on your doorstep, we designed everything with these priorities in mind. To learn more click here.

  • How does the subscription work?

    Fatty15 will come in a starter kit, containing everything you need to start improving your cellular health. In the fully recyclable (and dare we say inspiring) kit, you will receive a 90-day (3-month) supply of fatty15 capsules to be placed in your reusable glass bottle, as well as an educational insert. The starter kit has a 90 day supply because our studies support that fatty15 can take up to 3 months to achieve its initial health benefits.

Looking for more info? Here’s our full. FAQ.

Other Items

Check out some of our other essential items important for everyday life.

  • fatty15 tote bag

    Travel in style, whether heading to the store or out to enjoy natur...

    $60.00

  • fatty15 water bottle

    Stay hydrated with the fatty15 speckled copper vacuum insulated wat...

    $25.00

  • fatty15 hoodie

    This comfy and stylish fatty15 hoodie is perfect for the science bu...

    $49.95

  • fatty15 gift card

    Shopping for someone else but not sure what to give them? Give them...

    $49.95

  • fatty15 Treat Yo Cells t-shirt

    Gain some instant credibility with the fatty15 Treat Yo Cells t-shi...

    $19.95

  • fatty15 hoodie

    This comfy and stylish fatty15 hoodie is perfect for the science bu...

    $49.95

  • fatty15 Ask me about mitochondria t-Shirt

    Gain some instant credibility with the fatty15 Ask me about mitocho...

    $19.95

  • fatty15 replacement glass bottle

    Looking for an extra empty bottle to have around the house? Look no...

    $10.00

What's introductory pricing?

You’re among the first to start aging on your own terms.* And we think that calls for a celebration. So we’re offering our fatty15™ 90-day supply for $119.95 (normally $149.95). Start your subscription now to lock in the savings!

What’s included in my pre-order?

  • The Smarter Starter Kit

    1 reusable glass bottle and a 90-day supply of fatty15™.

  • The Quarterly Subscription

    A 90-day supply, delivered to your door quarterly.

  • When will I be billed?

    We'll bill you $119.95 today. Then, $119.95 every 90 days.

  • Ready to give your cells a fighting chance?

    We are too. Let’s do it!