Borax (boron supplement form)

Tier 4 — risky / avoid · Joint · Hormone claims

Sometimes promoted online as a cheap boron supplement for joint health and hormone balance. Borax is a cleaning product, not a dietary supplement, and is banned as a food additive in the US, EU, and Australia. The boron content is poorly controlled and high doses cause reproductive and kidney toxicity. Use boron glycinate instead if supplementing boron.

Dose: AVOID borax as a supplement; use boron glycinate (3–6 mg/day) for boron supplementation