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A quick look at Fatty15 supplements
- Fatty15 Original Capsules | Skip to review
- Fatty15 Original Capsules | Skip to review
- Fatty15 Original Capsules | Skip to review
What is Fatty15?
Fatty15 is a supplement brand that focuses on pentadecanoic acid (C15:0), an odd-chain saturated fatty acid
It was founded in 2021 by Dr. Stephanie Venn-Watson, a veterinary epidemiologist, and Eric Venn-Watson, a U.S. Navy veteran
The brand sells C15:0 in capsule and gummy formulations and markets it primarily for healthy aging
Fatty15: Product spotlight
Fatty15 currently offers three products: Original Capsules, Gummies for Adults, and Gummies for Kids
Does Fatty15 really work? What the science says
Heart health
According to a 2025 narrative review, higher C15:0 levels are associated with better cardiometabolic health in population studies, including lower risks of cardiovascular disease and type 2 diabetes
It may also help improve cholesterol and other blood lipids, reduce inflammation and oxidative stress, improve insulin sensitivity, and support mitochondrial function
Brain health
Laboratory research suggests C15:0 may have neuroprotective effects and could potentially support brain health as people age. It was found to affect two enzymes involved in brain signaling and neurotransmitter metabolism, which may be relevant to Alzheimer’s disease
Healthy aging
Authors of a 2023 study say that C15:0 has some similarities to rapamycin and metformin, two drugs being studied for their potential effects on aging and longevity
They point to large observational studies showing that people with higher levels of C15:0 in their blood tend to have a lower risk of various age-related diseases. Based on this, they propose that C15:0 is an essential nutrient that may support healthy aging and longevity. In fact, they go further and suggest that C15:0’s effects in laboratory studies are comparable to, or potentially better than, those of some longevity-related drugs
However, much of the above evidence comes from animal or laboratory research, so it cannot yet prove that C15:0 itself causes these health benefits in humans. While early studies are encouraging, larger and longer clinical studies are needed to determine the health outcomes of C15:0 supplementation
What our dietitian thinks
Medical Perspective
“Overall, the evidence is promising but not yet strong enough for general recommendations to the public. Someone who is interested in a C15:0 supplement such a person with metabolic health concerns, should first talk to a healthcare professional before adding it to a daily regimen and should never replace a healthy diet, exercise, or proven treatments.”
— Katherine Marengo LDN, R.D
Quotes represent the opinions of our medical experts. All content is strictly informational and should not be considered medical advice
How much does Fatty15 cost?
Fatty15’s prices vary depending on which product and purchase option you select
- Original Capsules: These can be purchased as a 30-day Trial Kit for $49.95, a one-time 90-day Starter Kit for $149.95, or 90-day subscription refill for $119.95. The Annual Supply Kit costs $459.95 for 360 capsules.
- Adult Gummies: These cost $79.95 for a one-time 30-day supply or $63.96 with a monthly subscription.
- Kids Gummies: These cost $64.95 for a one-time 30-day supply or $51.96 with a monthly subscription.
Currently, the brand offers a 20% discount on subscriptions, plus free shipping on all U.S. orders
You can buy Fatty15 supplements using a HSA or FSA with TrueMed. If you start a subscription and refer someone else, you can also receive a $10 discount on your next 90-day refill
Fatty15 vs. competitors
Fatty15 is one of the few supplement brands focused specifically on C15:0. For comparison, we’ve included broader supplement brands with similar price ranges and product offerings
Brand
Price range
Products
Certifications
Fatty15
$49.95 to$149.95
• C15:0 capsules and gummies• kids gummies
• cGMP certified• third-party tested for purity and potency
Thorne
$14 to $161
• vitamins• minerals• fish oil• herbal supplements• multivitamins• sports supplements• pre- and probiotics• kids supplements
• cGMP certified• certified by NSF• third-party tested for purity and potency
Pure Encapsulations
$15 to $213
• vitamins• minerals• fish oil• herbal supplements• multivitamins• sports supplements• pre- and probiotics• kids supplements
• cGMP certified• certified by NSF• third-party tested for purity and potency
Ritual
$22 to $99
• vitamins• multivitamins• fish oil• pre and postnatals• fertility and post partum support
• cGMP certified• certified by NSF• USP verified• non-GMO verified• third-party tested for purity and potency
Pros and cons at a glance
Below, we examine some of the pros and cons of Fatty15 supplements
What we like
- provides a standardized dose of C15:0
- offers capsule and gummy formulations
- all three products are vegan
- products are third party tested for quality and safety
- C15:0 ingredient is tested for purity
- subscriptions offer a 20% discount
- HSA/FSA eligible
- free shipping for every U.S. order
- 30-day money-back guarantee
- the brand makes research about C15:0 readily accessible
What to consider
- human research on C15:0 supplementation remains limited
- the brand has a limited product range
- certificates of analysis (COA) are not made available to consumers
Frequently asked questions
Yes. Fatty15 is an established supplement brand that was founded in 2021 and focuses on C15:0 products. The company provides information about its ingredients, manufacturing process, and product testing
Research into C15:0 is still growing, but early findings are promising. More studies in people are needed to better understand its potential health benefits and how C15:0 supplementation may support long-term health
Fatty15 may be worth it if you are curious about C15:0 and are seeking an easy way to add it to your diet. However, the benefits of taking C15:0 supplements are still being studied
If you are mainly looking for a supplement with proven health benefits, Fatty15 may not be the best choice. There is not yet enough research to know how much C15:0 supplements can improve health or support healthy aging
Fatty15’s supplements contain pentadecanoic acid, also known as C15:0. It is a type of fat known as an odd-chain fatty acid
The company says its C15:0 is made in FDA-registered, cGMP-certified facilities and tested for purity
Fatty15 contains C15:0, which researchers are investigating for its possible effects on cholesterol and heart health. Some early findings suggest C15:0 may influence LDL cholesterol levels
That said, the current evidence is largely based on laboratory and animal research. More studies in people are needed to determine whether taking C15:0 supplements, such as Fatty15, can actually lower cholesterol
The bottom line
Fatty15 offers a convenient way to get a standardized dose of C15:0, with capsules and gummies available for adults and children
Research into C15:0 is promising but still developing. While some studies have linked it with potential benefits for heart health, brain health, and healthy aging, more research in people is needed to understand whether taking C15:0 supplements provides these benefits
Our dietitian’s take: (summary of dietitians quote above to be inserted)
