Follistatin
FST · Activin-binding protein
A binding protein that acts as a natural antagonist of activin and of myostatin, studied for that role in muscle and reproductive biology. An endogenous protein, not a marketed product.
Tracking and educational reference only, on values you enter or import yourself. Not medical advice or a dosing recommendation.
Regulatory status
Not FDA approved
The FDA has not approved this substance for human use. It may be approved elsewhere, studied in the literature, or available through other routes, but it carries no approved US label and therefore no agency-reviewed instructions.
A regulatory status describes paperwork, not safety. An approved compound can still be wrong for a given person, and an unapproved one is neither thereby dangerous nor thereby fine.
Half-life
Not established in a public source. Half-life is an educational pharmacology figure, drawn from public sources, and is not a schedule or dosing instruction.
Storage & handling
No approved label defines handling.
References
- J Med Invest 1997: follistatin and its role as an activin-binding protein
Read the source
Common questions
Follistatin, answered plainly.
01What is Follistatin?+
A binding protein that acts as a natural antagonist of activin and of myostatin, studied for that role in muscle and reproductive biology. An endogenous protein, not a marketed product. It is also referred to as FST, Activin-binding protein. It is listed here under Growth Hormone as educational reference, which is not a recommendation to use it.
02Is Follistatin FDA approved?+
Not FDA approved. The FDA has not approved this substance for human use. It may be approved elsewhere, studied in the literature, or available through other routes, but it carries no approved US label and therefore no agency-reviewed instructions.
03What is the half-life of Follistatin?+
Not established in a public source. A half-life is an educational pharmacology figure describing how long the body takes to clear half of a substance. It is not a schedule and does not imply one.
04How is Follistatin stored and handled?+
No approved label defines handling. Storage conditions come from a manufacturer's own label where one exists, and a compound with no approved label has no agency-reviewed handling instructions at all.
Related in Growth Hormone
Educational reference only, compiled from public sources. Not medical advice, diagnosis, treatment, or a dosing recommendation, and not a recommendation to use any compound. Many compounds listed are research materials not approved for human use. Consult a qualified professional.