That is the entire evidentiary basis for the first selective growth hormone secretagogue. The limits are equally specific: one species, acute dosing, a hormone panel not a safety profile, not chronic exposure, not human data
For skin tone specifically, topical glutathione has the most supporting evidence, followed by oral, with IV the least established
J Cancer Res Ther
When the dough particles were fed with 1% body weight, the L-carnitine composition in the dry wheat flour-dough particles could promise the final carnitine intake was 0.05% body weight, which is in the accordance with the dose used in other animals 56,57
Strains of these bacteria have also been linked to weight loss, though we need clinical trials to develop recommendations for probiotics and weight loss