Arginine and ornithine supplementation increases growth hormone and insulin-like growth factor-1 serum levels after heavy-resistance exercise in strength-trained athletes.

What amino acid increases HGH?

Alternatively, HGH levels in the body can potentially be increased by stimulation of endogenous secretion by nutritional supplements, particularly those based on amino acids. The amino acids arginine, methionine, phenylalanine, lysine, and histidine have been shown to promote HGH secretion in adults (Knopf et al.

What does L ornithine do for your body?

L-ornithine plays a central role in the urea cycle which converts ammonia to urea in the liver. L-ornithine administration has been known to enhance detoxification of ammonia in the liver.