Is Potassium 5-oxo-L-prolinate vegan?

Potassium PCA is also known as Potassium 5-oxo-L-prolinate.

Potassium PCA is the potassium salt of pyrrolidone carboxylic acid (5-oxo-L-proline), a naturally occurring component of the skin's natural moisturizing factor, produced synthetically or by fermentation for cosmetic use as a humectant.

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