What turkesterone is and where the claims come from
Turkesterone is an ecdysteroid extracted from the plant Ajuga turkestanica, structurally distinct from the more-studied ecdysterone. Ecdysteroids are insect and plant hormones, and the muscle-building hypothesis proposes they signal through an estrogen-receptor-beta pathway to nudge protein synthesis without binding the androgen receptor, which is why they are marketed as non-steroidal.
The brief notes the hype runs ahead of the data, and that framing is accurate.
Why the evidence does not yet support the marketing
Most supportive findings come from cell or rodent work; controlled human trials on turkesterone specifically are essentially absent, and the better human data exist for ecdysterone, not turkesterone. Supplement potency and purity also vary widely because the category is loosely regulated.
This is general educational information, not medical advice. Claims that turkesterone reliably builds muscle in humans are not supported by current evidence. Consult a qualified professional before use, and be aware product contents may not match the label.