Ingredient review
Magnesium Aluminum Zinc Carbonate Hydroxide
INCI: MAGNESIUM/ALUMINUM/ZINC/HYDROXIDE/CARBONATE
A safe, multi-mineral powder that helps control shine and improve product texture without common irritation concerns.
In plain English
This ingredient is a fine, white powder made from a blend of magnesium, aluminum, zinc, hydroxide, and carbonate. In cosmetics, it works like a sponge to soak up excess oil and give products a smooth, matte finish. You'll often find it in powders, foundations, and deodorants to help them feel silky and stay put on your skin. It's generally considered gentle and non-irritating, making it a good choice for sensitive skin types.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is useful, but some claims depend heavily on the formula.
Risk flags are low for most users, though the finished product can still irritate.
- Source
- synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Magnesium Aluminum Zinc Carbonate Hydroxide is generally a lower-concern ingredient when the full formula suits your skin.
Plain-English read
Treat this as a practical screening step before you compare products that contain this ingredient.
- Step 1Start with the score, then check the irritation and clogging risk before judging Magnesium Aluminum Zinc Carbonate Hydroxide.
- Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
- Step 3If a product stings, breaks you out, or worsens irritation, judge the finished formula and stop using it even if the ingredient scores well.
Score terms in plain English
Irritation risk
lowLess likely to sting, burn, or bother most users, though sensitive skin can still react.
Clogging risk
lowLess likely to feel heavy or contribute to clogged pores for most skin types.
Evidence level
moderateThere is useful support, but formula details and claim strength still matter.
What it is
A synthetic, multi-mineral compound that forms a fine, absorbent powder. It is created by combining magnesium, aluminum, and zinc salts with hydroxide and carbonate groups, resulting in a stable, non-reactive particle.
How it works
When applied to the skin, the powder particles physically absorb excess sebum and moisture, reducing shine and helping other ingredients adhere better. It also scatters light, which can blur the appearance of fine lines and pores, and it helps thicken or stabilize the texture of creams and lotions.
Pros
Excellent oil control
Effectively absorbs sebum, helping to keep skin matte and shine-free throughout the day.
Gentle on sensitive skin
Low irritation and comedogenic risk make it suitable for most skin types, including reactive skin.
Cons and cautions
Can be drying
In high concentrations, it may strip natural oils, leaving dry or dehydrated skin feeling tight.
Limited inhalation data
There is limited independent research on the long-term safety of inhaling fine mineral powders, though typical cosmetic use is considered safe.
Best for
- People with oily or combination skin looking for a matte finish
- Anyone who prefers mineral-based, non-irritating powders
Use caution if
- Those with extremely dry or dehydrated skin may find it too absorbent
Usage tips
Safety summary
Magnesium Aluminum Zinc Carbonate Hydroxide is considered safe for topical cosmetic use. It has low irritation and comedogenic potential, and no significant safety concerns have been raised by regulatory bodies. As with any fine powder, avoid inhalation during application.
Research notes
Safety assessments by the Cosmetic Ingredient Review (CIR) and EU SCCS have not identified significant risks for similar mineral compounds. Most evidence comes from general mineral powder safety data rather than specific studies on this exact blend.
Common label clues
- Typical concentration
- 1–10% in powder formulations; lower in creams and lotions
- Regulatory status
- Approved for use in cosmetics globally, including by the U.S. FDA and EU CosIng database, with no known restrictions at typical use levels.
- Common uses
- Foundations, Powders, Concealers, Sunscreens, Deodorants
- Environmental note
- Synthetic mineral powders are generally not biodegradable, but they are not known to bioaccumulate or cause significant environmental harm when rinsed off in small amounts.
Good to know
- This ingredient is often used as a talc alternative in 'clean' beauty products.
- It is not water-soluble, so it works best in powder or anhydrous formulas.
Common questions
What is Magnesium Aluminum Zinc Carbonate Hydroxide in beauty products?
This ingredient is a fine, white powder made from a blend of magnesium, aluminum, zinc, hydroxide, and carbonate. In cosmetics, it works like a sponge to soak up excess oil and give products a smooth, matte finish. You'll often find it in powders, foundations, and deodorants to help them feel silky and stay put on your skin. It's generally considered gentle and non-irritating, making it a good choice for sensitive skin types.
What does Magnesium Aluminum Zinc Carbonate Hydroxide do in a beauty product?
When applied to the skin, the powder particles physically absorb excess sebum and moisture, reducing shine and helping other ingredients adhere better. It also scatters light, which can blur the appearance of fine lines and pores, and it helps thicken or stabilize the texture of creams and lotions.
Is Magnesium Aluminum Zinc Carbonate Hydroxide safe for most people?
Magnesium Aluminum Zinc Carbonate Hydroxide is considered safe for topical cosmetic use. It has low irritation and comedogenic potential, and no significant safety concerns have been raised by regulatory bodies. As with any fine powder, avoid inhalation during application.
Who should be careful with Magnesium Aluminum Zinc Carbonate Hydroxide?
Those with extremely dry or dehydrated skin may find it too absorbent
Research sources
Ingredient reviews are educational and are not medical advice. Patch test new products and ask a licensed clinician about persistent irritation, allergies, pregnancy-specific questions, or diagnosed skin conditions.