N-acetyl-L-cysteine (NAC), a form of the amino acid cysteine, in vegetarian capsules. Choose the 600 mg bottle (1 capsule per serving, 120 servings) or our higher-strength 900 mg bottle.
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You want to know what is in the bottle, how much, and what you are signing up for. Here is what we hear most, and how this bottle answers it.
“Which strength should I pick?”
Same NAC, two strengths. 600 mg is everyday; 900 mg gives more per capsule.
“What else is in the capsule?”
Three other ingredients, all listed: veggie capsule, microcrystalline cellulose, magnesium stearate.
“I don’t want a big routine.”
One capsule is one serving on the 600 mg label.
“I always forget to reorder.”
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NAC (N-acetyl-L-cysteine) is a supplement form of cysteine, an amino acid the body uses to make proteins and glutathione. Cysteine is also found in protein foods such as poultry, eggs and legumes.
Our Professional Line NAC comes in two strengths in vegetarian capsules. The 600 mg bottle lists 1 capsule per serving and 120 servings.

Pregnant, nursing, taking medication (including nitroglycerin or blood thinners) or managing a medical condition? Please check with your healthcare provider before use.
What you can check on the bottle, not promises about results.
600 mg or 900 mg per capsule.
1 capsule per serving on the 600 mg label.
Three other ingredients.
Made in a GMP-certified facility.
What is on the label, how to take it, safety notes and the downsides.This is a dietary supplement and we make no promises about results.
N-acetyl-L-cysteine. The 600 mg bottle lists 600 mg per capsule, 120 servings, with veggie capsule, microcrystalline cellulose and magnesium stearate as other ingredients.
Same NAC in vegetarian capsules. The 900 mg bottle gives you more per capsule. Ask your provider which suits you.
For the 600 mg bottle, the label suggests 1 capsule daily, or as directed by your health care provider. For 900 mg, follow your bottle.
NAC contains sulfur, so a mild sulfur smell is normal.
Yes, the capsule is vegetarian.
Anyone pregnant, nursing, taking medication or managing a medical condition.
Standard shipping is free on US orders of $49 or more (flat $4.95 below that). Orders placed Monday to Friday before 12 PM PT ship the same business day; we do not ship on weekends. Every order has our 60-day money-back guarantee. Choose Subscribe and save above the Add to Cart button to save 15% and get deliveries every 1, 2, 3, 4 or 6 months; skip, pause or cancel any time from your account.
For the 600 mg bottle, the label suggests 1 capsule daily, or as directed by your health care provider.
The 900 mg bottle has its own directions; follow the label.
Many people take it with a full glass of water.
This is a dietary supplement. Here is the plain version of what people ask us most.
NAC has a natural sulfur smell when you open the bottle. That is normal.
NAC can interact with some medicines, including nitroglycerin. Ask your pharmacist.
Some people notice nausea or an upset stomach; taking it with food can help.
It is not organic, and we don’t promise results. Our 60-day guarantee lets you decide.
600 mg bottle
Serving size: 1 capsule
Servings per container: 120
N-Acetyl-L-Cysteine: 600 mg (Daily Value not established)
Other ingredients: veggie capsule, microcrystalline cellulose, magnesium stearate
900 mg bottle: see the label on your bottle for its serving and ingredients.
Transcribed from the label. If anything differs, the label on your bottle is the reference.
Whichever brand you buy, these are the things worth checking on the bottle. Here is where ours stands, including the parts that are not a selling point.
| Check the label for | NAC |
|---|---|
| Form | ✓N-acetyl-L-cysteine |
| Amount per capsule | ✓600 mg or 900 mg |
| Servings (600 mg) | ✓120 |
| Capsule type | ✓Vegetarian |
| Other ingredients (600 mg) | ✓Microcrystalline cellulose, magnesium stearate |
| Who makes it | ✓Mother Nature Organics, Austin, TX; GMP-certified facility |
Mother Nature Organics is a founder-led brand, founded in 2016 by Kathy and Ed Sexton and based in Austin, Texas. Kathy is Peruvian, and her connection to Peru shaped the company from day one.NAC is part of our Professional Line, listed plainly so you can read exactly what is in the bottle.
Every order is covered by our 60-day money-back guarantee. Free shipping on orders of $49 or more, and orders placed before 12 PM PT ship the same business day.
Add to cart*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.
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| Serving size: 1 Capsule Servings per container: 120 | ||
| Amount per serving | % DV | |
|---|---|---|
| N-Acetyl-L-Cysteine | 600 mg | † |
†Daily Value not established.
Other ingredients: Veggie Capsule, Microcrystalline Cellulose, Magnesium Stearate
Transcribed from the product label. If anything differs, the label on your bottle is the reference.
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