Intra-islet glucagon, acting through the beta cell GLP-1R and glucagon receptors, may also contribute to the incretin effect, perhaps reconciling findings of low circulating levels of GLP-1 yet substantial meal-stimulated GLP-1R-dependent potentiation of insulin secretion [45, 46]
In other words, are they supported by any scientific evidence
Carnitine seems to provide more energy for sperm cells and it may reduce cell death in the testes, according to preliminary findings [22]
Glutathione side effects are typically mild to negligible in most clinical studies, with nausea, abdominal discomfort, and allergic reactions reported in less than 5% of users
It is often discussed for its potential role in supporting healing, especially in tendons, ligaments, muscles, joints, nerves, and other connective tissues