Metabolic Nutrition NAC is an antioxidant support capsule: 650mg of N-acetyl L-cysteine per serving, in a 30-capsule bottle. NAC is a stable form of the amino acid L-cysteine and a building block for glutathione, one of the body's main antioxidants.† The brand says it makes this product in its own manufacturing facility, with no unnecessary fillers or artificial additives. Metabolic Nutrition doesn't publish the capsules per serving, the full other-ingredients list or an allergen statement online, so check the label on the bottle.
Supplement Facts: Metabolic Nutrition NAC (Per Serving)
Antioxidant Support
- N-Acetyl L-Cysteine (NAC): 650mg
- No proprietary blends. Single active ingredient.
- Capsules per serving and servings per container aren't published online. Check the Supplement Facts panel on the bottle.
- 30 capsules
- Directions: 1 serving daily with food, or as directed by your healthcare professional.
- Allergen information isn't published online. Check the label if you have allergies.
About Metabolic Nutrition
Metabolic Nutrition is a sports nutrition brand known for its single-ingredient amino acids and its ultra cold-pressed line. Its wellness range covers NAC, NMN, NAD products and other daily capsules. The brand says it manufactures its supplements in-house rather than using outside contract manufacturers. NAC sits in the wellness side of the lineup as a simple daily antioxidant.†
N-Acetyl L-Cysteine 650mg
Your body uses cysteine, along with glutamine and glycine, to build glutathione. Cysteine is usually the limiting piece, and NAC is a more stable, well-absorbed way to supply it.† Glutathione helps support the body's antioxidant defenses and normal liver function.† NAC has been studied for decades, and 600mg is a common daily amount in research, so 650mg per serving sits right in that range.†
Frequently Asked Questions
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When should I take NAC?
Metabolic Nutrition suggests one serving daily with food. Taking it with a meal can also help if NAC upsets your stomach. Morning or evening both work; pick a time you'll remember. Consistency matters more than exact timing.† -
Why does NAC smell like sulfur?
NAC contains sulfur, so a faint rotten-egg smell when you open the bottle is normal. It doesn't mean the product has gone bad. Keep the lid closed tightly and store it somewhere cool and dry. The capsules themselves are easy to swallow without tasting it. -
How many capsules are in a serving?
The brand lists 650mg per serving online but doesn't state how many capsules that is. Check the Supplement Facts panel on the bottle for the exact serving size. Our staff can also read the label for you in store. Don't take more than the label directs. -
Can I take NAC with my other supplements?
NAC is commonly taken alongside a multivitamin, vitamin C or other wellness capsules. It can interact with some medications, including nitroglycerin and certain blood thinners, so check with your physician if you take prescriptions. It is not a stimulant and contains no caffeine as listed. Space it away from activated charcoal, which can bind it.†
How to Take Metabolic Nutrition NAC
Take 1 serving daily with food, or as directed by your healthcare professional. Check the bottle's Supplement Facts panel for the number of capsules per serving. Do not exceed the label's directions. If you are pregnant, nursing, taking medication or have a medical condition, check with your physician before use.
Why Buy at Get Yok'd
- Real-time inventory across all six Southern California stores
- Available in Burbank, Glendale, Glendale Galleria, North Hollywood, Northridge, and Pasadena
- Authorized Metabolic Nutrition retailer, carrying their single-ingredient amino acids, wellness capsules and supplement accessories
- Staff who can read the full label with you and help fit NAC into a daily wellness routine
- One of the best loyalty programs in the supplement industry: earn rewards on every purchase
Who Should Exercise Caution with NAC
- Anyone under 18
- Pregnant or nursing women
- Anyone with asthma, a bleeding disorder or upcoming surgery
- Anyone taking nitroglycerin, blood thinners or other prescription medication: ask your physician first
†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.