l-carnitine max daily dose | Linus Pauling Institute L-carnitine benefits, uses & dosage:

Ablation of cholesterol biosynthesis in neural stem cells increases their VEGF expression and angiogenesis but causes neuron apoptosis

The latter effects of metformin were recognized in epidemiological studies of diabetic patients taking metformin versus those who were taking another anti-hyperglycemia drug

Most of the research on L-lysine today centers around these mechanisms and the many potential benefits and drawbacks that come with them, but there are some more nuanced and specific case studies coming to light as well

Ledermann JA, Oza AM, Lorusso D, Aghajanian C, Oaknin A, Dean A, et al

Anti-ageing effect: Helps to reverse cell ageing and rebuild the central structure of the skin, leading to an overall improvement in the skin's appearance