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№ 037

Follistatin 344

Myostatin antagonist. Binds and neutralizes myostatin, the negative regulator of muscle growth. Theoretical muscle-growth signal — limited human data.

GH-axis
Evidence: Anecdotal
Half-life
~hours (poorly characterized)
Route
Subcutaneous
Cycle
10-30 days max
Schedule
Daily
In plain English

Follistatin 344 blocks myostatin — the protein that puts a ceiling on how much muscle you can build. Theoretically removing the brake means more muscle growth. Real human data is very limited. Treat as experimental, run short cycles only.

Status & legality
Natty?
Not natty

Myostatin antagonism is universally banned in tested sport.

FDA
Not approved

Not FDA approved.

Compounding
Not classified

Not formally categorized in the FDA bulks lists.

WADA
Banned (S4)

S4 Hormone and Metabolic Modulators — myostatin inhibitors are explicitly listed.

Prescribed

Not prescribed in conventional medicine.

Who it's for

  • →Bodybuilders / lifters experimenting with muscle-growth pathways
  • →Researchers studying myostatin biology

What to expect

  1. Week 1

    Anecdotal pumps and fullness reports.

  2. Week 4

    Subjective effects peak around here for responders. Cycle endpoint — stop.

  3. Week 8

    Off-cycle. No long-cycle data exists.

How it works (mechanism)

Glycoprotein that binds and neutralizes myostatin. Different mechanism from ACE-031 — direct ligand-binding rather than receptor-decoy. Theoretically permits increased muscle growth by removing the negative regulator.

Dosing protocol

100-300 mcg sub-q daily for 10-30 days. No long-cycle protocol exists.

Stacks well with

Standalone — pairing it makes signal harder to read

Side effects

01Limited human safety data
02Theoretical: cardiac and tendon issues with chronic strong myostatin suppression
03Injection-site irritation

When NOT to use

  • ⚠Anyone risk-averse to limited human data
  • ⚠Pregnancy / nursing
  • ⚠Active malignancy

Common mistakes

  • • Running it longer than 30 days without safety data
  • • Treating it as steroid-equivalent (it isn't)
  • • Stacking with too many other compounds and crediting Follistatin for everything

Educational only. User-specific dosing is between you and a qualified provider.

Frequently asked

What is Follistatin 344?+
Follistatin 344 blocks myostatin — the protein that puts a ceiling on how much muscle you can build. Theoretically removing the brake means more muscle growth. Real human data is very limited. Treat as experimental, run short cycles only.
Is Follistatin 344 FDA approved?+
Not FDA approved.
Is Follistatin 344 banned by WADA?+
Follistatin 344 is on the WADA prohibited list under Banned (S4). S4 Hormone and Metabolic Modulators — myostatin inhibitors are explicitly listed.
Are you still natty after taking Follistatin 344?+
No. Myostatin antagonism is universally banned in tested sport.
Do doctors prescribe Follistatin 344?+
Not prescribed in conventional medicine.
What's the typical dose of Follistatin 344?+
100-300 mcg sub-q daily for 10-30 days. No long-cycle protocol exists.
What are the side effects of Follistatin 344?+
Common side effects include: Limited human safety data; Theoretical: cardiac and tendon issues with chronic strong myostatin suppression; Injection-site irritation. Less common effects and full safety details are on the entry page.
How long until Follistatin 344 starts working?+
Anecdotal pumps and fullness reports.

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