I inquired about this not so much for its fat burning effects due to raising cAMP levels, but I was wanting to experiment with it for its potential tanning effects.
I'm sure some of you are aware about the study where topical application of coleus turned mice practically black. The darker pigmentation produced was real, and not staining or superficial coloring of the epidermis (like self tanners).
I'm on another forum (about tanning) where a gal is taking a large daily dosage of 20% extract (2 grams I think), and she claims it is enhancing her ability to tan and decrease burning. So far she is doing ok, but the large dose does concern me due to potentially affecting the thyroid.
It's probably a long shot, but I wonder how this would be mixed with penetrate and applied topically. May be worth looking into.