NAC / N-Acetyl Cysteine
Also known as: N-Acetyl Cysteine, N-Acetyl-L-Cysteine, NAC, Acetylcysteine
NAC (N-Acetyl Cysteine) is a modified form of the amino acid cysteine that is a precursor to glutathione, the body's master antioxidant. It supports respiratory health, detoxification, and immune function. NAC is rapidly absorbed and effectively increases intracellular glutathione levels.
Benefits
Powerful antioxidant supporting cellular protection and detoxification. Boosts glutathione production for comprehensive antioxidant defense. Supports respiratory health and reduces mucus buildup. Protects liver health and supports detoxification. Enhances immune function and helps fight infections. May support cardiovascular health. Supports brain health and neurotransmitter production.
Recommended Dosage
No established RDA. Common supplement doses: 500–1,500 mg daily (1–3 doses). Some conditions use up to 2,000–3,000 mg daily. Upper limit: 2,000–3,000 mg daily (conservative). Take with water, between meals or with food depending on tolerance. Effects improve with continued use over weeks.
Food Sources
Garlic, onions, cruciferous vegetables (broccoli, cabbage, Brussels sprouts), eggs, poultry, beef, whole grains, legumes.
Side Effects
Generally well-tolerated. Mild side effects: nausea, diarrhea, constipation, stomach cramps, headache. May cause bad breath or body odor due to sulfur content. High doses may cause vomiting, rashes, or hives (rare). May cause hypothermia in susceptible individuals.
Interactions
May reduce effectiveness of acetaminophen detoxification (protective effect but relevant for dosing). Nitroglycerin effects may be reduced. May enhance or interfere with certain medications' metabolism. Works synergistically with selenium and vitamin E. Interactions generally beneficial or neutral.
Warnings
Those with asthma should use caution (may increase airway reactivity). People taking acetaminophen should not combine without medical supervision. Pregnant women should consult doctor before supplementing. Those with cystine kidney stones should avoid. May cause false positive drug test results (rare).
Deficiency Symptoms
Poor antioxidant defense and increased free radical damage. Impaired detoxification and immune function. Respiratory symptoms and mucus buildup. Poor wound healing. Weakened immune response to infections. Reduced liver health and detoxification capacity.
Frequently Asked Questions
What are the benefits of NAC / N-Acetyl Cysteine?▼
Powerful antioxidant supporting cellular protection and detoxification. Boosts glutathione production for comprehensive antioxidant defense. Supports respiratory health and reduces mucus buildup. Protects liver health and supports detoxification. Enhances immune function and helps fight infections. May support cardiovascular health. Supports brain health and neurotransmitter production.
What is the recommended dosage for NAC / N-Acetyl Cysteine?▼
No established RDA. Common supplement doses: 500–1,500 mg daily (1–3 doses). Some conditions use up to 2,000–3,000 mg daily. Upper limit: 2,000–3,000 mg daily (conservative). Take with water, between meals or with food depending on tolerance. Effects improve with continued use over weeks.
What foods contain NAC / N-Acetyl Cysteine?▼
Garlic, onions, cruciferous vegetables (broccoli, cabbage, Brussels sprouts), eggs, poultry, beef, whole grains, legumes.
What are the side effects of NAC / N-Acetyl Cysteine?▼
Generally well-tolerated. Mild side effects: nausea, diarrhea, constipation, stomach cramps, headache. May cause bad breath or body odor due to sulfur content. High doses may cause vomiting, rashes, or hives (rare). May cause hypothermia in susceptible individuals.
What are the symptoms of NAC / N-Acetyl Cysteine deficiency?▼
Poor antioxidant defense and increased free radical damage. Impaired detoxification and immune function. Respiratory symptoms and mucus buildup. Poor wound healing. Weakened immune response to infections. Reduced liver health and detoxification capacity.
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Supplement Disclaimer
This supplement information is for educational purposes only and should not replace professional medical advice. Dietary supplements are not intended to diagnose, treat, cure, or prevent any disease. Always consult with a healthcare provider before starting any supplement, especially if you are pregnant, nursing, taking medications, or have a medical condition.