can melanotan change eye color peptide might seem like the cool thing to do—it makes you look tan., But these unregulated injections come with real risks., They cause unpredictable skin changes, including darkening of 50 Weeks on Melanotan2. Used
Description
This is particularly true if the skin is still healing and more susceptible to pigmentation changes.3

The partial rescue of the above-described symptomatology can be ascribed to the activity of other transporters such as ATB 0,+ (SLC6A14), MCT9, and probably, OCTN1 (SLC22A4) that accept carnitine with a much lower affinity if compared to OCTN2

Chem 263, 29983004 (1988)
It is also an organ that needs energy from metabolism