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L-Cysteine HCL Monohydrate Powder

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Price From: FROM $12.96

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L-Cysteine HCL Monohydrate Powder


  • Maintains optimal health
  • Promotes fast muscle recovery
  • Healthy skin, hair & nails
  • Taste

  • Mixability

L-Cysteine HCL is an amino acid with added HCL for easy digestion and absorption. Cysteine supports healthy hair, nails and skin and overall wellness. It may also aid in muscle recovery.


Serving Size & Timing

This supplement should be taken in servings of 500mg to be consumed between one and three times per day.

Nutritional Information

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 (rounded 1/8 tsp) one to three times a day, or as directed by physician.

US Standard Measuring Spoons
Spoon Size(level) milligrams
1/16 teaspoon 185
1/8 teaspoon 371
1/4 teaspoon 742



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.

California residents: Click here for Proposition 65 warning.

Customer Reviews

Great Product
This is part of my dog's Raw food diet. It was suggested by Mike at KetoPets who worked with a vet to put together this diet. So far my dog has loved it!*

On 3/17/2019 Julie said...

Good for your liver
If you like to have a glass of wine everyday like I do. This product is a good cleanser for the liver. *

On 3/12/2019 Catherine said...

L-Cysteine HCL Monohydrate Powder
Arrived so quickly. Everything goes smoothly. Really enjoy the powder received. Very good quality. Will definitely buy again. *

On 10/31/2018 JiangBo said...

Other uses also
This stuff is excellent for supporting quitting smoking, kind of helps to forget the desire of it. Also helped a lot for breathing difficulties, caused by mucus of smoking, and milk products, by breaking the mucus down. Didn't get the same results with NAC.
Totally thumbs up. Thank You.*

On 2/22/2018 Elina said...

Bought this to complete a dr. Clark wipe up parasite cleanse and its effective. It's a bit hard to handle.. It's not easy to make capsules as it is sensitive to moisture and gets sticky quick. But it's doable. And it works!*

On 1/12/2017 Marguerite said...

Great with pre workout drinks
This is the second time in 2 weeks i reviewed this- I do not see that it was listed so I am doing this again.

L-Cysteine HCL Monohydrate is the best additive for a preworkout drink. It give a bit more energy and it helps with the other amino acids i add to my pre and post workout drink

I take 2-3 grams 2 x a day. Once in the morning before i treadmill and once in the afternoon before workout.

The quality and price are outstanding.
Love this solution *

On 12/15/2015 William said...

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Product Questions

Hi, what is the highest safe dosage of l-cysteine in the same day.
A consumer told in the comments that he take between 4 and 6 grams a day.

I would like to take high dose like this, is it safe?

1) Can you tell me an article that says that 6 grams a day is safe.
2) Can I contact this consuler to ask him a question?

Thank you.