Two amino acids have been shown to increase production of VIP as well:
L-Arginine and Glycine, given at 3 grams before bedtime. Incidentally, glycine at this dose is often also helpful at inducing deeper stages of sleep, which may be part of the reason why it increases VIP (since VIP levels rise with cortisol in the morning).
Arginine is a conditionally essential basic amino acid involved primarily in urea metabolism and excretion, as well as in DNA synthesis and protein production.* It is an important precursor of nitric oxide (NO) and thus plays a role in the dilation of blood vessels.
• Conditionally Essential Amino Acid
• Nitric Oxide Precursor
Glycine Powder contains the amino acid glycine in a pure powder form for flexible dosing and patient convenience. Glycine is a conditionally essential amino acid used for structural protein synthesis, detoxification pathways, neurotransmitter function, brain health, sleep support, and healthy blood sugar levels already in the normal range.* It is a primary constituent of collagen, making up over one third of the total amino acids in this key structural component of blood vessels, skin, bones, cartilage, tendons, ligaments, and other connective tissue. Glycine powder mixes well in water or any other beverage, and may be beneficial in supporting normal muscle tissue repair post workout.