Kisspeptin-10

How it works

The active end of kisspeptin, which wakes GnRH neurons, the brain's master switch for sex hormones. Sold to raise testosterone.

What it's made of

10 amino acids: the final end of kisspeptin, the signal from the hypothalamus that wakes up the GnRH neurons. It is the smallest active piece, unchanged. Its gene was discovered in 1996, as a brake on metastasis.

What it's for

Prescribed for

Nothing.

Sold as

Raising testosterone and libido “naturally,” by switching on your own hormonal axis.