OnePin Peptide Library · Metabolic
Epicatechin
(-)-Epicatechin
Epicatechin (specifically (-)-epicatechin) is a naturally occurring flavanol found in high concentrations in dark chocolate (cacao), green tea, apples, and certain berries. It belongs to the flavan-3-ol subclass of flavonoids and has gained research interest for its potential effects on skeletal muscle physiology, cardiovascular health, and exercise performance. Epicatechin has been studied as a natural myostatin inhibitor and follistatin promoter, which has attracted attention in the sports nutrition and muscle-building communities.,Research, primarily from the laboratory of Dr. Francisco Villarreal at UC San Diego, has shown that epicatechin can modulate the myostatin-follistatin ratio in both animal models and small human studies. Myostatin is a negative regulator of muscle growth, and reducing its activity or increasing follistatin (which binds and inhibits myostatin) may promote muscle hypertrophy and improved muscle function. Additionally, epicatechin has demonstrated effects on mitochondrial biogenesis, nitric oxide production, and endothelial function.,Epicatechin is available as an over-the-counter dietary supplement and is generally recognized as safe (GRAS) as a food component. Clinical evidence for its muscle-building and performance-enhancing effects in humans remains preliminary, with most studies being small and short-term. Its cardiovascular benefits through nitric oxide-mediated vasodilation are better established in the broader flavanol literature.
Start here. Every protocol below is ordered lowest-first. Begin at the smallest effective dose, hold about a week to assess tolerance, and step up only if needed.
How it works
Decreases myostatin and increases follistatin expression in skeletal muscle, shifting the balance toward a pro-anabolic signaling environment. This effect is mediated in part through modulation of the TGF-beta/Smad signaling pathway.,Stimulates mitochondrial biogenesis through activation of PGC-1alpha and SIRT1 pathways, increasing mitochondrial volume and oxidative capacity in muscle fibers. This may improve endurance and muscle fatigue resistance.,Enhances nitric oxide (NO) bioavailability by stimulating endothelial nitric oxide synthase (eNOS) activity, leading to improved vasodilation, blood flow, and reduced blood pressure. Also exerts antioxidant effects by scavenging reactive oxygen species.
Decreases myostatin and increases follistatin expression in skeletal muscle, shifting the balance toward a pro-anabolic signaling environment. This effect is mediated in part through modulation of the TGF-beta/Smad signaling pathway.,Stimulates mitochondrial biogenesis through activation of PGC-1alpha and SIRT1 pathways, increasing mitochondrial volume and oxidative capacity in muscle fibers. This may improve endurance and muscle fatigue resistance.,Enhances nitric oxide (NO) bioavailability by stimulating endothelial nitric oxide synthase (eNOS) activity, leading to improved vasodilation, blood flow, and reduced blood pressure. Also exerts antioxidant effects by scavenging reactive oxygen species.
What to expect
Days 1-7: Myostatin/follistatin ratio shifts detectable in blood work within 7 days (per published data at 1mg/kg/day). Nitric oxide effects may improve exercise performance subtly.
Evidence
Interactions & stacking
What's safe to combine, and what belongs in a separate pin.
Safe & synergistic
Keep separate
Pharmacokinetics
Storage. Store in a cool, dry place away from light. Oral compound - no reconstitution needed. Some formulations recommend refrigeration.
Regulatory status
Dietary supplement (OTC) in the United States. Classified as a food component with GRAS status. Not FDA-approved as a drug for any indication. Not a controlled substance. Available worldwide as a nutritional supplement.
Put it to work
Calculate, log & track
Open Epicatechin straight into OnePin with your vial and dose pre-filled, then let it handle the syringe math and remind you before the vial runs out.
Open Epicatechin in the app →Go deeper
The guide & community
The complete Epicatechin walkthrough, real protocol discussion and coaching live inside the BlessUp community on Skool.
Join the community ↗