https://heavymetalcertified.com/standards/deep-conditioning-treatments-rinse-offPublished revisions of this Heavy Metal Certified page.https://heavymetalcertified.com/standards/deep-conditioning-treatments-rinse-offhttps://heavymetalcertified.com/standards/deep-conditioning-treatments-rinse-off#revision-76dc9d7539ec37f6Mon, 21 Sep 2026 04:04:58 GMTThe Heavy Metal Tested & Certified heavy-metal-safety standard for deep conditioning treatments/hair masks (rinse-off) in Cosmetics and Personal Care — Rinse-off, evaluated on finished cosmetic as placed on market — total element content per unit mass of undiluted product as sold (µg/kg). Not a dietary basis, not a migration or leachate basis, and no use-pattern dilution credit.. 5 of 11 panel analytes publish a numeric limit taken from the strictest applicable government maximum; the remainder are held under mandatory control or a substantiated not-material determination.