Glutathione is a powerful antioxidant that plays a crucial role in detoxification processes in the body, particularly in the liver
10.3390/jcm9072095 J Clin Med
Here is an overview of the main benefits of glutathione, categorized into several key areas : Improvement of skin condition Reduction of aging signs Reduction of psoriatic skin conditions Improvement of liver function Detoxifying agent Regeneration of vitamins E and C Strengthening of the immune system Cancer prevention Important for cardiovascular health Reduction of oxidative stress Improvement of insulin resistance Reduction of autoimmune disease symptoms Reduction of Parkinsons disease symptoms Improvement of respiratory function Recommended daily intake of glutathione for adults : Complete guide Recommended daily intake of glutathione for adults : Complete guide The daily intake of glutathione can vary based on age, gender, health status, and environmental stress levels

"Two-month treatment of obese subjects with the oral growth hormone (GH) secretagogue MK-677 increases GH secretion, fat-free mass, and energy expenditure." Journal of Clinical Endocrinology & Metabolism 83.2 (1998): 362-369
Theyre also quite expensive ingredients, which partly explains why theyre not used super often by cosmetic labs (or only in small quantities)
doi: 10.3390/molecules27092774 7 GaoCZhouYChenZLiHXiaoYHaoWet al