At GERI G.® Beauty, our philosophy has always been rooted in Transceutical Living® — the belief that true results come from the intersection of professional treatment, high-performance product, and intentional daily habits. It's why we've spent years refining what happens on your skin. Now, we're going a layer deeper.
We're proud to introduce fatty15 Practitioner Strength in the studio: a once-daily, science-backed supplement designed to support the health of your cells as you age — formulated at twice the strength of the version sold at retail, and available exclusively through providers like GERI G.® Beauty.
Why cells matter more than you think
Every part of your body — your skin, your energy, your mood, your resilience — is built from cells. As we age, those cells naturally become more fragile and less efficient, and that shift shows up everywhere: in energy levels, in balance, in how your skin holds its glow.
At the center of fatty15 is C15:0 (pentadecanoic acid) — a newly identified essential fatty acid that research shows helps strengthen cell membranes, support mitochondrial function, and promote healthy aging from the inside out. In fact, C15:0 is the first new essential fatty acid to be identified in over 90 years, and it's now been studied in more than 100 peer-reviewed publications.
We've always said healthy skin starts with healthy habits — movement, nourishment, sleep. fatty15 doesn't replace any of that. It supports it, by nourishing the cellular foundation everything else is built on.
Healthy skin starts with healthy cells. Healthy aging starts from within.
What Is fatty15? Your Questions, Answered
What exactly is fatty15?
fatty15 is a once-daily oral supplement formulated with a single ingredient: pure pentadecanoic acid (C15:0). It's designed to counter age-related cellular breakdown by strengthening cell membranes, supporting healthy mitochondrial function, and naturally activating receptors throughout the body and brain that help regulate immunity, metabolism, mood, appetite, and sleep.*
How is the Practitioner Strength formula different?
The version we offer in-studio is formulated at twice the strength of the retail product — still just one capsule, once a day. Our starter package includes two 30-day packs, giving you a full two-month supply to begin your routine. Refill packs are sold separately, and GERI G. Rewards members receive a discount on refill purchases.
How long before I notice a difference?
Many people notice near-term shifts within the first few weeks, including:
- Less snacking and hunger between meals
- Deeper, more restful sleep
- A calmer mood and steadier stress response
- More sustained energy throughout the day*
For the deeper, longer-term benefits — the kind tied to healthy aging at the cellular level — research supports consistent daily use over 1 to 3 months.
What makes fatty15 different?
fatty15 uses pure, bioavailable, patented C15:0 — backed by over 100 peer-reviewed studies showing measurable improvements in key biomarkers of healthy aging. It's been shown to support more than 36 cellular functions tied to metabolic, liver, red blood cell, immune, and cognitive health.
CHOOSING BETWEEN REGULAR AND PRACTITIONER STRENGTH
Regular fatty15
- Available direct-to-consumer on fatty15.com
- Provides 100 milligrams of pentadecanoic acid (C15:0) per capsule BarBend
- Sold in a subscription model, no prescription or practitioner needed
Fatty15 Advanced Formula Extra Strength (the "practitioner strength" version)
- A practitioner-exclusive, higher-dose C15:0 supplement, launched via Fullscript in June 2026
- Delivers a potent daily dose of pure C15:0 — i.e., a higher dose per capsule than the standard product
- Available only through approved healthcare practitioners and Fullscript — you can't buy it directly as a consumer; a practitioner has to recommend/dispense it Fatty15
- Positioned for people with more specific or intensive nutritional needs, at the discretion of a healthcare provider
Ready to bring healthy aging into your routine?
Ask about fatty15 Practitioner Strength at your next visit, and let's talk about how it fits into your Transceutical Living® routine.
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
