There is no approved human dose. Human studies have used gene therapy, not injected protein.
Label and guideline amounts are shown for reference only. They are not a recommendation, and we never give cycle or performance amounts. Any use belongs under a doctor’s care, with bloodwork.
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Measuring calculator
Converts an amount you enter into what to measure. It does not suggest an amount.
Strength used: 1 mg per vial
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Injection sites
Follistatin 1mg is a freeze-dried powder. After mixing with bacteriostatic water, compounds like this are usually injected subcutaneously (subQ): into the fat just under the skin with a short insulin needle.
Belly injections: distance from the navelMassachusetts General Hospital · Patient education · YouTube, plays here when clicked
Finding it. Anywhere on the belly at least 5 cm from the navel, avoiding scars and the belt line. Pinch a fold of skin and inject into it.
Why it is used. The most-used subcutaneous site: easy to see, plenty of fat and steady absorption. Weekly GLP-1 pens list it first.
Watch out. Move each injection 2 to 3 cm from the last to avoid hard lumps.
Volume per site
About 1 ml or less
Needle
4 to 13 mm insulin needle, 29 to 31G
Thigh injections: the safe bandMassachusetts General Hospital · Patient education · YouTube, plays here when clicked
Finding it. The middle of the front of the thigh, a hand-width below the hip and a hand-width above the knee.
Why it is used. Easy to reach seated and a good second site to rotate with the belly.
Watch out. Absorption can be a little slower than the belly.
Volume per site
About 1 ml or less
Needle
4 to 13 mm insulin needle, 29 to 31G
Back of the arm and rotating sitesMassachusetts General Hospital · Patient education · YouTube, plays here when clicked
Finding it. The fleshy back of the upper arm, halfway between shoulder and elbow.
Why it is used. A third site to rotate through so each spot rests longer.
Watch out. Hard to pinch and reach on yourself; a helper makes it easier.
Why these sites for Follistatin 1mg
Subcutaneous (subQ)
Belly first. The abdomen has the most fat and the steadiest absorption, and you can see what you are doing.
Short needle, small volume. About 1 ml or less per spot with an insulin syringe. Pinch the skin if you are lean.
Move every time. Keep each injection 2 to 3 cm from the last to avoid lumps.
Every time: wash your hands, wipe the vial stopper and skin with alcohol, use a new sterile needle and syringe, and never share. See a doctor for spreading redness, heat, swelling, pus, fever or numbness. This is general guidance from standard nursing practice, not medical advice; a pharmacist or nurse can show you in person.
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Combinations and interactions
Prescribed or used alongside
Needs bacteriostatic water and U-100 insulin syringes.
Drug interactions
No interaction data.
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Risks and bloodwork
Unknown effects
No human data for injected follistatin.
Reproductive hormones
Follistatin also binds activin, which regulates FSH.
Stability
Large proteins degrade easily; handle and store with care.
Sport
Myostatin inhibitors are prohibited by WADA.
Bloodwork doctors check
No standard panel exists; a complete blood count and fasting glucose are a sensible baseline
Not for
People under 18, anyone pregnant or breastfeeding, anyone with active cancer or a history of cancer, and anyone with diabetes unless a doctor is involved.
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Canadian legal status
Health Canada has not approved this compound for human use. It is sold for research purposes, and most sports bodies prohibit it. This is general information, not legal advice.
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References
FollistatinPatel K · Int J Biochem Cell Biol, 1998 · PMID 9785474
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Adults 18+. This page is general information, not medical advice. Talk to a licensed healthcare provider before using any compound.
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