Follistatin

Follistatin is a naturally occurring protein that blocks myostatin, and the small community running it does so almost entirely for muscle growth and recovery. There is no FDA-approved use in people; every human application is off-label or compounded, and the underlying evidence is preclinical and animal-only. People report a wide dose range, from 50 micrograms up to 10 milligrams, but the most common is 100 micrograms daily. Report volume is thin enough that no consistent picture of tolerability has emerged, so treat both the efficacy and safety signal as early and unsettled.

Data last updated

ClinicalResearchDepthClinicalResearchEfficacyClinicalResearchSideEffectsno dataAnecdotalEfficacyAnecdotalSideEffectsPrice1.81.72.63.41.0

Measured on 5 of 6 axes

Research Evidence

Evidence shape

Follistatin currently holds a low evidence tier, as the existing human literature is restricted to five diagnostic and mechanistic studies rather than clinical trials for therapeutic use. While the peptide is frequently discussed in preclinical research, there are zero registered human trials and no completed studies evaluating its efficacy for specific health indications. This lack of clinical data means that current research remains entirely exploratory, with no evidence base to support its use outside of controlled laboratory settings.

Depthhow much
0 registered trials
Breadthhow many areas
2 indications mapped
1 thin / exploratory · 1 animal-only
Qualityhow rigorous
No completed trials
Breadth and depth24 rows captured
Human
direct clinical signal
5
Animal
translational support
11
In vitro
mechanistic support
8
HighMediumLow

Anecdotal efficacy

Follistatin side effects

Clinical research side effects

Clinical safety table not projected yet.

Anecdotal side effects

Price

Full buying guide →
1
prymalab.net
--
10 mg
$99.99
$10/mg
2
peptidesourcehub.com
--
10 mg
$249.90
$24.99/mg
3
123 Peptides
--
1 mg
$40.00
$40/mg
4
OP Labs
United Kingdom
1 mg
$66.98
$66.98/mg
5
peptides-eu.com
--
1 mg
$80.00
$80/mg
6
Tide Labs
United Kingdom
1 mg
$84.43
$84.43/mg

price offers can be sorted by column

1-6 of 39

Follistatin dosing & protocol

How Follistatin is dosed across research, clinician, and community sources — each evidence tier kept separate so the dose range, frequency, timing, and cycling stay visible without flattening different levels of evidence.

Research trials
Published clinical-trial protocols
Typical dose
—
0
2 mg
4 mg
6 mg
8 mg
10 mg
no dose captured for this tier yet

No structured protocol details captured for this tier yet.

No completed trial has been identified for follistatin, so no dosing figure is reliably on record for this tier.

Clinician practice
Doctor & published-protocol guidance
Typical dose
—
0
2 mg
4 mg
6 mg
8 mg
10 mg
no dose captured for this tier yet

No structured protocol details captured for this tier yet.

Anecdotal
Community-reported real-world use · n = 11
Typical dose
100 µg50 µg – 10 mg
typical
0
2 mg
4 mg
6 mg
8 mg
10 mg
distribution of 17 reported doses · darker = more
By reported cadence· tap a row to filter the chart
Frequency
mostly daily
Route
subQ

Most users who specified a schedule take Follistatin at 100 mcg subcutaneously each day, while a smaller group doses weekly at 5 mg and others did not state a frequency; reported amounts span from 50 mcg up to 10 mg.

11 sources

Related peptides

IGF-1 LR3IGF-1 DESMGFPEG-MGFGDF-8 (Myostatin)