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Now Foods, L-Cysteine, 500 mg, 100 Tablets

By Now Foods

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  • Product Code: NOW-00077
  • UPC Code: 733739000774
  • Package Quantity: 100 Tablets
  • Dimensions: 4.4 x 2.5 x 2.5 in, 0.4 lbs (0.18 kg)
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Product Overview

  • Structural Support
  • Promotes Healthy Skin, Hair and Nails
  • With Vitamin B-6 and C
  • GMP Quality Assured
  • A Dietary Supplement

NOW L-Cysteine is a non-essential amino acid that is an important component of hair, nails and the keratin of the skin. L-Cysteine stabilizes protein structure and aids in the formation of collagen, thereby promoting healthy skin, hair and nail texture and elasticity.

Suggested Use

As a dietary supplement, take 1 tablet 1 to 3 times daily as needed. Consider taking this product in combination with NOW GliSODin, Alpha Lipoic Acid and Antioxidant Caps.

Other Ingredients

Cellulose, citric acid, silica, magnesium stearate (vegetable source) and vegetable coating.

Contains no sugar, salt, starch, yeast, wheat, gluten, soy, milk, egg, shellfish or preservatives.


Do not eat freshness packet. Keep in bottle.

Store in a cool, dry place.

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Supplement Facts
Serving Size: 1 Tablet
  Amount Per Serving % Daily Value
Vitamin C (as Ascorbic Acid) 60 mg 100%
Vitamin B-6 (from Pyridoxine HCl) 10 mg 500%
L-Cysteine (from L-Cysteine Hydrochloride) 500 mg
† Daily Value not established.

iHerb Customer Reviews

5 Stars
4 Stars
3 Stars
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1 Stars

NOW's L-Cysteine: No info on its source. Is it from human hair?

Posted by Reviewer2631717 on Dec 06, 2013

I bought this as an alternative to NAC for liver detox and support, because it is good to pause or alternate ALL supplements. Now I discovered on Dr. Mercola & Wikipedia that 80% of it is made from hair swept up in chinese barbers. Then from duck feathers and hog hair. It can also be made from fermentation, but is 3X as expensive. Some sites also say it is a brain excitent which eventually burns out the brain if taken in high doses. On NOW's site, they offer no info on their source, but offer the absolute cheapest L-Cysteine. Anyone know of a non- hair source? I give it 3 stars until I know more. Also of concern is the general lack of details re ingredients on their labels. For instance: There are over 4 kinds of vitamin K-4. Menaquinone 4, 7,8 and 11. Only the Menaquinone 7 is of true value for humans. The others are inexpensive or synthetic forms of no true value. Now Foods has a large number of vitamin supplements that avoid telling us exactly what we are getting. And I am getting more suspicious of this company for this evasive strategy. Millie from Canuckland

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40 people found the following review helpful

Something that finally seems to be working against hair loss

Posted by 4630873230070687781 on May 20, 2013

I'm a female in my very early 30's and an inexplicable case of hair loss that no doctor or blood test seems to be able to detect 'medically'. Purchased NOW L-Cysteine after my dermatologist recommended it to me as a non medical solution. Seems to be working after 5 months of religious use - new hairs are sprouting all over my head.

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37 people found the following review helpful

Not vegetarian

Posted by 5441691892673307650 on Dec 28, 2013

I have to say I'm rather upset. The description of this product is misleading (including terms like (vegetable source) and vegetable coating,nowhere it is written that this is not suitable for vegetarians. I spent a good amount of time doing some research on the internet to find out where Now Foods L-Cysteine is derived from, after reading another review here of somebody wondering the same thing. Finally I found it on Now Food's homepage ( not under product description) but in a different section. L-Cysteine derived from Whey or Chicken Feathers. I feel defrauded, because in the way they put this product description it is not obvious at all that this is an animal based product - which by the way is fine - but being so vague and inexplicit gives me the impression that this is yet another company that most probably knowingly conceals the precise description in order to make some more bucks.

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16 people found the following review helpful

Hangover cure, huge tablet

Posted by Reviewer3337984 on Mar 02, 2011

Been taking this with grape juice and thiamine(B1) the nights I go drinking and the combo is working. Last time I drank over 10 servings(I drink this much maybe 5 times a year so I don't have real tolerance) combo and went straight back to school after 7 hours of sleep as usual. The capsule is about the size of largest soft gel -capsules I've seen.

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13 people found the following review helpful

L-cysteine - Hair Manna

Posted by Isabella on Sep 11, 2013

Everybody wants thick hair & skin and this is the pill that can support that goal. I take this regularly and I'm seeing considerably less hair fall. ===================================================================================== Click my name Isabella ▲ at the top of this review (blue text) to visit my profile ===================================================================================== If you found this review helpful, please let me know by clicking the “YES”-button below the review.

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12 people found the following review helpful

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