Follistatin vs Hexarelin

A detailed comparison to help you understand the differences and choose the right peptide for your research goals.

Follistatin

Follistatin is a glycoprotein that inhibits myostatin, the protein responsible for limiting muscle growth. By blocking myostatin, follistatin can theoretically allow for increased muscle development beyond natural limits.

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Hexarelin

Hexarelin is a potent synthetic hexapeptide growth hormone secretagogue. It provides the strongest GH release among GHRPs but is associated with rapid desensitization of receptors.

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Side-by-Side Comparison

Aspect	Follistatin	Hexarelin
Dose Range	50 mcg–100 mcg	100 mcg–300 mcg
Frequency	1x daily	2x daily
Cycle Length	2–4 weeks	8–12 weeks
Route	subcutaneous	subcutaneous
Mechanism	Binds to and neutralizes myostatin and activin, both of which are negative regulators of muscle mass. This removes the natural brake on muscle growth, allowing for enhanced hypertrophy.	Acts as a ghrelin mimetic with high potency at the GHS receptor. Provides powerful GH release but receptor desensitization occurs faster than with other GHRPs, requiring cycling.
Typical Dosage	Research protocols typically use 100-300mcg daily, though optimal dosing is not well established. Gene therapy approaches have also been studied.	Typical dosing: 100-200mcg administered 2-3 times daily for 4-6 weeks, followed by an equal off period to allow receptor resensitization.
Administration	Subcutaneous injection. Different isoforms exist (FS344, FS315) with varying properties. Requires careful sourcing due to complexity.	Subcutaneous injection. Cycling is essential to maintain effectiveness. Often used in short bursts rather than continuous protocols.
Side Effects	Limited human data. Theoretical concerns about effects on other organs where activin signaling is important.	Water retention, cortisol and prolactin increase, hunger (moderate), tingling, and potential blood pressure effects.
Best For	Muscle Growth	Muscle Growth Recovery & Healing