Short answer

We found no documented interaction between Lion's mane and NAC in the sources below. That isn't proof the combination is right for you: check each one's cautions, and ask your pharmacist if you take medication.

Lion's mane

What it is: An edible mushroom used in East Asian medicine, sold for memory, mood and stress.

What the research says: Limited human studies suggest it may help memory and mood in some groups, such as older adults with mild memory problems. Most research is in the lab.

Cautions

• Reported side effects include stomach discomfort, nausea and skin rash.

Medicines to check

• Talk to your clinician if you take any medicine

In Holitro: Lion's Mane (500 mg per capsule)

Source: Memorial Sloan Kettering Cancer Center, About Herbs: Lion's Mane Mushroom (updated June 2024)

NAC (N-acetylcysteine)

What it is: An antioxidant that's both a hospital medicine (for acetaminophen overdose) and a supplement.

What the research says: As a medicine it treats acetaminophen poisoning. As a supplement, results for lung conditions and as an add-on for depression are mixed.

Cautions

• It can cause stomach upset, nausea, diarrhea, tiredness or rash; less often low blood pressure or headache.

Medicines to check

• Nitroglycerin: don't combine (severe headaches, lower blood pressure)
• Antidepressants: animal studies suggest NAC may strengthen their effect
• Cancer treatment: check with your care team

In Holitro: NAC (600 mg per capsule)

Source: Memorial Sloan Kettering Cancer Center, About Herbs: N-Acetylcysteine (updated October 2022)

Check with your doctor or pharmacist, especially if you take medication.

Check your stack — free

Educational information only, not medical advice. This reflects general ingredient overlap, not a personalized safety review. Always check with your doctor or pharmacist before combining supplements, especially if you take medication, are pregnant or nursing, or manage a health condition. These statements have not been evaluated by the FDA.