Can You Take Comfrey and Kava Together?

Use extra care with this pair

The short answer

Both Comfrey and Kava are hepatotoxic. Comfrey's pyrrolizidine alkaloids cause hepatic veno-occlusive disease, while kavalactones cause hepatocellular damage. Combined use targets the liver through distinct but cumulative pathways.

How to arrange timing

Avoid this combination. Comfrey is already restricted or banned for oral use in many countries due to hepatotoxicity.

Reference

Reference noted for this combination: Teschke R. et al., Ann Hepatol 2012; LiverTox (NIH/NLM)

Important context

Whether supplements suit you together also depends on dose, product formulation, health conditions, and medication use. Ask a doctor or pharmacist first if you take medication, are pregnant or breastfeeding, or have a chronic condition.