L-Cysteine HCL Monohydrate Powder

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L-Cysteine is conditionally essential. This means that the body generally produces enough of it on its own, but during exercise, much of it can be depleted which means that Cysteine will need to be supplemented in order to get the right amount back in the body.

Cysteine helps to keep protein structures intact and also helps in the formation of collagen indirectly which gives it its effects of helping to maintain hair, nail, and skin health. This is not the only thing Cysteine is good for though, also going on to promote the production of Glutathione and L-Taurine.

Glutathione is an antioxidant which helps keep the nervous system going and protects healthy cells from damage by free radicals. Taking Glutathione alone is not a good way to supplement Glutathione as Cysteine is required to facilitate it. Taurine also helps the nervous system stay in order while maintaining the function of the eyes, correct levels of blood pressure, the burning of fat, and the building of muscle.

L-Cysteine also heightens the amount of N-Acetyl Cysteine in the body which in turn helps the body to maintain muscle mass and Glutathione levels more efficiently. The body needs L-Cysteine for the immune system to activate at the right time and also needs it to produce T-cells and insulin.

Cysteine may be derived from Methionine and can also be found by itself in high protein foods. As well as certain vegetables and spices such as onions, broccoli, garlic, and red peppers.

Health Benefits Provided by L-Cysteine HCl

Taurine cannot be created in the body without Cysteine which means it would be much harder for the body to retain lean muscle mass with it, and Cysteine is also needed for Glutathione to be created correctly. Cysteine is also an essential part of the metabolic process for a variety of different nutrients and vitamins. Vitamin B6 would be useless without Cysteine.

Supplement Facts

Serving size: 500 milligrams
Serving per container: *
Amount Per Serving % Daily Value**
L-Cysteine HCL 500mg *
* Daily Value not established.
** Based on 2,000 calorie diet


Sugar, soy, dairy, yeast, gluten, corn and additives.

As a dietary supplement, take 500mg one to three times a day, or as directed by physician.


While this supplement has no fillers of any kind, it does have a water molecule attached to it.

Due to the sulfuric content of L-Cysteine, this product has a somewhat strong odor. This is normal and is an indicator of its potency.


As long as suggested serving sizes are adhered to, this supplement is considered safe for consumption. However, taking too much may cause stress and DNA damage. Those diagnosed with Cystinuria should not take this supplement due to risk of gallstones developing. Drink plenty of water when taking this supplement.


This supplement is easily dissolved in warmer water. It has a bit of a sour taste to it. It may be more effective if taken in conjunction with Vitamin C, E, B6, Selenium and Calcium. It should be stored in an area free from light, heat and moisture.

There is no guarantee of specific results and results can vary. 

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease. 

California residents: Click Here for Proposition 65 warning.

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