Supplement Scholar
Compound

(−)-Epicatechin

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(−)-Epicatechin. Cocoa flavanol for follistatin/myostatin.

How it works. Inhibits myostatin; activates NO.

What the research supports. 1 graded claims. Strongest: Improves muscle function (moderate).

How much to take. Typical dose: 150 mg.

Side effects and interactions. 1 medication interaction listed. No serious side effects listed at normal doses.

Stacking. Pairs well with Creatine monohydrate, Whey or EAAs, Omega-3.

Common forms. Available as Capsule or softgel, Powder, Sublingual or buccal, Liposomal liquid.

Key studies. 8 studies cited. The strongest are listed with links to PubMed.

Community. Experiences from people who have tried (−)-Epicatechin. Anecdotes are not medical advice.

(−)-Epicatechin. Cocoa flavanol for follistatin/myostatin.

Molecular structureC15H14O6 · 290.27 g/mol

What it is

Cocoa flavanol for follistatin/myostatin.

Food sources

Endogenously produced or biosynthesized moleculeStandardized pharmaceutical- or food-grade supplementCombined with cofactors that improve absorption or activity

Goals

Muscle GrowthCardiovascular Health

How it works

Inhibits myostatin; activates NO.

Pathways

  • Inhibits myostatin
  • activates NO

Effects

  • +muscle function supports

What the research supports

Improves muscle functionmoderate

Strong: consistent results across large trials or meta-analyses. Moderate: several trials, mostly positive. Limited: small or mixed studies. Preclinical: animal or cell research only.

Typical dose
150 mg
TimingConsistent daily timing recommended; split larger doses if GI tolerance is a concern.
With foodWith a meal containing fat for fat-soluble compounds; otherwise either.
Best formMost evidence is based on the capsule or softgel form.
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Side effects & interactions

Common side effects

  • GI upset

Medication interactions

Prescription medications (general)minor

Always disclose (−)-Epicatechin use to your prescriber — additive, antagonistic, or pharmacokinetic interactions are possible.

Check any supplement–medication combination with your pharmacist before starting.

Combines with

Pairs well

  • Creatine monohydrateFoundational support for strength, power, and lean mass.
  • Whey or EAAsProvides amino acid substrate for muscle protein synthesis.
  • Omega-3Anti-inflammatory cardiovascular synergy.

Common forms

  • Capsule or softgel
  • Powder
  • Sublingual or buccal
  • Liposomal liquid

Key studies

8 studies cited in total.

PubMed: (−)-Epicatechin — Improves muscle function ↗
Systematic review · PubMed (NLM) · 2026

Opens current human and preclinical literature matching (−)-Epicatechin and "Improves muscle function". Filter by RCT, meta-analysis, or year on the results page.

PubMed: (−)-Epicatechin — randomized controlled trial ↗
Systematic review · PubMed (NLM) · 2026

Opens current human and preclinical literature matching (−)-Epicatechin and "randomized controlled trial". Filter by RCT, meta-analysis, or year on the results page.

PubMed: (−)-Epicatechin — meta-analysis ↗
Systematic review · PubMed (NLM) · 2026

Opens current human and preclinical literature matching (−)-Epicatechin and "meta-analysis". Filter by RCT, meta-analysis, or year on the results page.

Discussion

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