N-acetyl Cysteine (NAC) is the more stable form of the amino acid L-Cysteine due to the additional acetyl molecule attached. L-Cysteine can directly participate in glutathione synthesis, whereas N-acetyl-L-cysteine must be first de-acetylated (i.e., broken down) before its incorporation to glutathione. Cell studies have shown L-Cysteine to be more effective in increasing cellular antioxidant glutathione levels. However, L-Cysteine is less stable than NAC so oxidizes more readily in the body. To help prevent or slow this process, 3x more ascorbic acid (vitamin C) should be consumed. So for every 1g L-Cysteine consider taking 3 g Vitamin C.

I read an article about a new study saying this will cure hangovers. Thoughts?

I read that article and bought a bottle to try. It works! Absolutely amazing hangover cure that actually works. I get hangovers from just 2 glasses of beer normally and now I get virtually none. I just take 2 tablets each time I drink and may take another if I go hard. If I drink too much and forget to take a 3rd tablet, I may have a very mild headache the next day, which is much improved from being out for the count all day like I used be after drinking. My boyfriend and roommate can also attest and ask me for some whenever we have some drinks together. All I can say is, just try it. You'll be amazed.

Is it made of human hair? If surprised read about L cysteine or E920(another name) on internet

Apparently synthetic L-Cysteine is expensive to manufacture, so human hair, duck feathers and pigs' bristles can be used. Whether NOW's L-Cysteine is a product of human hair it is not clear.

Is this product vegan?

It is most commonly derived from human hair.

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NOW Foods Supplements, L-Cysteine 500 mg with Vitamins B-6 and C, Structural Support*, 100 Tablets

Product ID: 2576147

Details

Brand
NOW Foods
Diet Type
Kosher
Flavor
Unflavored
Item Form
Tablet
Item Weight
6.4 ounces
Item dimensions L x W x H
2.5 x 2.5 x

🌿Non-GMO, vegan & allergen-free

💊500 mg L-Cysteine per tablet

🧪GMP & ISO/IEC certified quality

€ 24.45

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Description

✨ Elevate your natural glow with science-backed structural support 💪

VITAMIN B 6 C SYNERGY - Boosts amino acid metabolism and antioxidant defense
CLEAN CONSCIOUS FORMULA - Non-GMO, soy-free, gluten-free, vegan, halal & kosher certified
TRUSTED QUALITY ASSURANCE - A-rated GMP manufacturing with rigorous third-party testing
POWER PACKED 500 MG L CYSTEINE - Supports collagen synthesis for radiant skin, hair, and nails
100 TABLETS FOR LASTING WELLNESS - Sustain your beauty and structural health daily with a convenient supply

NOW Foods L-Cysteine 500 mg tablets combine a potent amino acid with essential Vitamins B-6 and C to promote healthy skin, hair, and nails by supporting collagen formation and antioxidant metabolism. This non-GMO, allergen-free, vegan formula is crafted under strict GMP and ISO/IEC certified conditions, ensuring premium quality and purity in every tablet. With 100 tablets per bottle, it’s a reliable daily boost for professionals who demand both efficacy and clean ingredients in their wellness routine.

Specifications

ASIN	B000QVEI1A
ASIN	B000QVEI1A
Age Range Description	Adult
Allergen Information	Allergen-Free
Best Sellers Rank	#61,543 in Health & Household ( See Top 100 in Health & Household ) #2,465 in Blended Vitamin & Mineral Supplements #3,072 in Sales & Deals #5,017 in Diet & Sports Nutrition
Brand Name	NOW Foods
Color	Off White
Container Type	Bottle
Customer Reviews	4.5 4.5 out of 5 stars (3,948)
Date First Available	March 2, 2004
Department	Health and Beauty>Health and Wellness
Diet Type	Kosher
Dosage Form	Capsules,Tablet,Tablets
Flavor	Unflavored
Global Trade Identification Number	00733739000774
Item Dimensions	2.5 x 2.5 x 4.44 inches
Item Form	Tablet
Item Weight	6.4 ounces
Item model number	0077
Manufacturer	NOW Sports - Nutrition and Wellness
Manufacturer	NOW Sports - Nutrition and Wellness
Manufacturer Part Number	0077
Material Features	Vegan
Model Name	hfs-koi-zk-a665
Model Number	0077
Number of Items	1
Primary Supplement Type	Vitamin B6, Vitamin C
Product Benefits	Skin Health
Product Dimensions	2.5 x 2.5 x 4.44 inches; 6.4 ounces
Special Ingredients	Amino Acid, Collagen
Specific Uses For Product	Amino Acid
Total Servings Per Container	100
UPC	733739000774
Unit Count	100 Count

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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€ 24.45

Duties & taxes included

In stock

Sold byAmazon SlovakiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Slovakia.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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