Nutrients and herbal supplements for mental health

Some nutrient supplements and herbal medicines have supportive evidence for efficacy in some mental health disorders, other products do not. Omega-3 fatty acids (eicosapentaenoic acid), St John's wort (high quality, standardised extracts), S-adenosyl-methionine and zinc may be beneficial in improving mood. N-acetyl cysteine has shown some effects in bipolar depression and may be of benefit in obsessive compulsive disorder. Kava is effective for reducing anxiety. However, there have been concerns about hepatotoxicity. It is important to be aware of potential drug interactions between prescription drugs, herbal medicines and supplements. Patients should be asked which products they are taking.