Collagen accounts for about 30% of the total protein in your body; 28% of collagen, in turn, is made up of the amino acid glycine
Glycine is the amino acid with the highest concentration in connective tissue. Its benefits go far beyond connective tissue health as glycine has anti-inflammatory effects, acts as a neurotransmitter, and plays an important role in the epigenetic regulation that drives the aging process
Glycine helps protect against viruses by reinforcing the extracellular matrix, which acts as a physical barrier to infectious agents such as bacteria, fungi and viruses
Most people need 8.5 to 10 grams more glycine than what their bodies can synthesize in a day.
https://www.globalresearch.ca/how-glycine-fights-viruses/5841367