The tested one
Food-grade calcium bentonite tested for heavy metals
Clay naturally has some lead and arsenic. Testing shows the levels are low.
What variations of bentonite clay exist?
A fine clay formed from volcanic ash that binds substances in the gut and absorbs oil on the skin. Like charcoal, it binds medicines and nutrients too. It comes in 3 forms, and they aren't all the same. Here's how they differ.
Medical Disclaimer
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
- Skin: the face mask (Clay face mask (skin only))
Every form, in plain words
The tested one
Food-grade calcium bentonite tested for heavy metals
Clay naturally has some lead and arsenic. Testing shows the levels are low.
The face mask
Clay face mask (skin only)
Soaks up oil on your skin. Not for swallowing.
Good for: Skin
Usually skip
- Not for swallowing (Untested or cosmetic-grade clay taken by mouth)May contain lead or other heavy metals. Cosmetic clay isn't made to be swallowed.
Spotting a good one on the shelf
Look for
- Look for 'Food-grade calcium bentonite tested for heavy metals' on the label (the tested one)
Watch out for
- No third-party testing for lead and other heavy metals
- Says 'for external use only' but also tells you how to drink it
- Sold for daily, long-term 'detox' use
Check with your provider first if…
- You take any medicine. Clay soaks up medicines and nutrients, so take them at least 2 hours apart, and ask your provider first.
- You're pregnant or breastfeeding: don't swallow it. Clay can contain lead.
- You get constipated or have had a bowel blockage. Drink plenty of water with it.
- Children: don't give clay by mouth without a provider's guidance
- Swallowing it for a long time may lower your iron and potassium
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.