The simple one
NAC capsules
Simple, well studied, and easy to find.
Good for: Everyday use
What variations of NAC exist?
A form of the amino acid cysteine that your body uses to make glutathione, a key antioxidant. It also helps thin mucus. It comes in 3 forms, and they aren't all the same. Here's how they differ.
For education only. What's right for you depends on your health and your medications, so check with your provider before you start or switch. Book a consult
Our top pick
- Also consider
- Easy to take: the fizzy one (Effervescent NAC tablets)
Every form, in plain words
The simple one
NAC capsules
Simple, well studied, and easy to find.
Good for: Everyday use
The fizzy one
Effervescent NAC tablets
Dissolves in water. Helpful if capsules are hard to swallow.
Good for: Easy to take
The glutathione one
Liposomal or S-acetyl glutathione
Gives you glutathione itself (a key antioxidant) instead of the building block NAC provides.
Spotting a good one on the shelf
Look for
- Look for 'NAC capsules' on the label (the simple one)
Watch out for
- Capsules that are clumped, sticky, or discolored, since NAC breaks down with moisture
- Proprietary blends that hide how much NAC is in the product
Check with your provider first if…
- You take nitroglycerin or other nitrates. NAC can make headaches and low blood pressure worse.
- You have asthma, since NAC has tightened the airways in some people
- You have a bleeding disorder, take blood thinners, or are having surgery soon
- You're pregnant or breastfeeding
- A sulfur smell is normal. Stomach upset or nausea is the most common side effect.
In Dr. Lesher's store
2 products in Dr. Lesher's dispensary have NAC. Here's which form, where the label says.
Check with your provider before taking any of these, especially if you're pregnant or take medications.
Metagenics
Immune Active™
300 mg per serving
Vitanica
OvaBlend (PCOS Blend)
200 mg per serving
Ready to find the root cause?
Dr. Lesher is a Naturopathic Doctor who focuses on autoimmune and chronic conditions in women. Since 2020, she's helped hundreds of patients stop managing symptoms and start healing.