Serine is an amino acid. An amino acid is a building block for protein. Serine comes in two forms: L-serine and D-serine. L-serine can be consumed in the diet. It can also be made in the body. D-serine can be made in the body from L-serine.

D-serine is used for schizophrenia, Parkinson disease, and memory and thinking skills (cognitive function), and many other conditions. L-serine is used to improve sleeping, Lou Gehrig's disease (amyotrophic lateral sclerosis or ALS), and many other conditions. There is no good scientific evidence to support most of these uses.

How does it work ?

The body uses D- and L-serine to make proteins. D-serine also transmits chemical signals in the brain. So, it might help with schizophrenia and other brain conditions.
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