L-cysteine derived from feathers is not vegan but it is vegetarian. ... (Petrochemically-derived L-cysteine, which would be considered vegan, is no longer being commercially produced today.) “Vegetable L-Cysteine” Is Scientifically Inaccurate. The term “vegetable L-cysteine” suggests that its source is vegetable.

Can Vegans eat l-cysteine?

It's made from a variety of different natural ingredients, although not all of them are necessarily Vegan. Not all L-Cysteine is vegan as much of it is technically sourced from animal hairs and feathers, however an equal portion is sourced from human hairs. A smaller portion of L-cysteine is made from coal tar.

How do vegans get cysteine?

Vegans can also increase cysteine levels by following a diet that includes plenty of onions, garlic, chives, shallots, kale, red peppers, cabbage, nuts, seeds, soy, and whole grains; most of which is already part of a vegan diet.