Some target the GLP-1 receptor alone, while others act on both GIP and GLP-1 pathways
Annu Rev Nutr 18:1938 Chatzifotis S, Pavlidis M, Jimeno CD, Vardanis G, Sterioti A, Divanach P (2005) The effect of different carotenoid sources on skin coloration of cultured red porgy (Pagrus pagrus)
However, it has been suggested that a vegetarian/vegan diet can be a rich source of the carnitine precursor TML (Servillo et al
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These come with certain risks for anyone on medication or with a condition that affects their blood pressure, so its especially important that you discuss adding any such supplements with your doctor
Now we need to make sure they are used the way people deserve: thoughtfully, compassionately, responsibly, and with a plan for lasting weight loss