--- title: "Green Clay: Benefits, Uses & Side Effects | Herbadex" description: "A clay used in face masks to absorb oil and dirt. Drinking it is not recommended: it can contain heavy metals such as lead and arsenic." language: en url: https://herbadex.com/en/herb/green-clay/ source: Herbadex (https://herbadex.com) --- [Clay, Soap & Other](https://herbadex.com/en/form/other/) # Green Clay Montmorillonite / Illite (mineral) C Laboratory / animal evidence A clay used in face masks to absorb oil and dirt. Drinking it is not recommended: it can contain heavy metals such as lead and arsenic. [Skin & Hair](https://herbadex.com/en/for/skin-hair/) Image: Herbadex Botanik Stüdyosu · Özel Üretim Pregnancy **Caution** Breastfeeding **Caution** Children **Caution** Drug interactions **Interaction reported** ## At a glance Green clay is a mineral mix of montmorillonite and illite, coloured by iron oxides. Its surface binds oil and dirt, so it is used as a mask for oily and acne-prone skin; this absorbing effect has been shown in the lab. Drinking it as a "cleanse" is not recommended: clay products can contain lead and arsenic and block the absorption of medicines and nutrients. **Parts used:** mineral **Key constituents:** Aluminosilicates (Montmorillonite, Illite), Iron Oxides, Magnesium & Calcium Updated: October 15, 2026 ℹ Compiled from standard pharmacognosy references and clinical literature summaries where no formal EMA monograph exists. ## What is it used for? - C Laboratory / animal evidence Used as a mask on oily skin because it absorbs oil and dirt; this effect has been shown in the lab. \[1\] ## How is it used? ### Topical Mix 1 tablespoon of clay with water into a paste, apply thinly to the face and rinse with warm water before it fully dries (10 minutes). **Amount:** 1–2 times a week \[1\] ## Safety & interactions **⚠ External use only** - Do not drink it: it may contain heavy metals (lead, arsenic) and block medicine absorption; lead poisoning from eating clay has been reported. - May dry dry or sensitive skin; do not let it dry completely. - Do not apply to open wounds or inflamed skin. - Do not inhale the powder. \[1\] ### Drug interactions | Medicine / substance | Effect | Severity | | --- | --- | --- | | All medicines, if swallowed | Clay binds medicines and blocks their absorption. [1] | Major | ### Side effects - Skin dryness and tightness - If swallowed: constipation, heavy-metal poisoning risk #### ⚕ When to see a doctor - If high fever, shortness of breath or purulent/bloody phlegm develops - If symptoms do not improve within 1–2 weeks or worsen - If severe abdominal pain, jaundice, rash or allergic reaction occurs ## Did you know? Eating clay (geophagy) is a tradition in some cultures, but today it is discouraged because of the lead poisoning risk. \[1\] ## Frequently asked questions Can green clay be drunk? Not recommended. It may contain heavy metals and blocks medicine absorption. Does green clay help acne? It absorbs oil, so it is used as a mask for oily skin; it does not replace acne treatment. How long should a clay mask stay on? About 10 minutes; rinse before it fully dries. ## Sources 1. [Trease and Evans Pharmacognosy (16th Edition)](https://www.sciencedirect.com/book/9780702029332/trease-and-evans-pharmacognosy) Elsevier Health Sciences · 2009 ### Cite This Page Green Clay (Montmorillonite / Illite (mineral)). Herbadex — Doğal Şifa Rehberi (2026). https://herbadex.com/en/herb/green-clay/ ## Related guides and comparisons - [How to Prepare Herbal Tea](https://herbadex.com/en/guide/how-to-prepare-herbal-tea/) - [How to Use Essential Oils Safely](https://herbadex.com/en/guide/essential-oil-safety/) - [Herbal Products and Drug Interactions](https://herbadex.com/en/guide/herb-drug-interactions/) ## On this page At a glance What is it used for? How is it used? Safety & interactions Did you know? Frequently asked questions Sources Related herbs ## Related herbs ### [Echinacea](https://herbadex.com/en/herb/echinacea/) A Strong clinical evidence Echinacea purpurea Juice pressed from fresh echinacea plants may help with short-term prevention and treatment of colds. 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