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Amino acid

L-Serine

L-serine is an amino acid the body makes itself and also gets from food. It is a building block of proteins and of phospholipids in cell membranes.

Also listed as Serine

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Serine already comes with protein

Meat, dairy foods, fish, eggs, legumes, nuts, seeds and whole grains supply serine. It is present within dietary proteins, so food intake cannot be equated with taking a large isolated dose. 1 2

Sources