Phytic Acid
INCI · Phytic Acid · also Inositol Hexaphosphate, IP6, Rice Bran Extract Acid
How it works
Phytic acid is a naturally occurring compound found in rice bran, wheat bran, and legume seeds, technically classed as an organic acid rather than a classic AHA. Its exfoliating action is milder and slower than glycolic or lactic acid, working more through gentle loosening of surface cell adhesion than aggressive bond-breaking. Its more distinctive job is chelation — phytic acid binds free iron and copper ions on the skin's surface, ions that otherwise catalyze oxidative damage and worsen post-inflammatory pigmentation. That dual identity, mild exfoliant plus metal chelator, is what sets it apart from other acids on an ingredient list.
The evidence
Phytic acid has a much thinner clinical trial record than its AHA cousins; most of what we know comes from its long history as a food-grade antioxidant and chelator plus dermatology formulations that pair it with brighteners like kojic or tranexamic acid. I treat it as a gentle support player rather than a headline exfoliant — useful, but don't expect glycolic-acid-level resurfacing or dramatic before-and-afters from phytic acid alone.
Suitability
Its mildness makes it a sensible choice for people who react to stronger acids, and its chelating action is particularly relevant for melasma-prone skin, where iron-catalyzed oxidation contributes to pigment relapse. Oily and combination skin tolerate it well as a low-grade daily exfoliant, and sensitive skin generally fares better with it than with glycolic acid.
Concentration
Most formulations sit between 1–2%, often blended with other mild acids; standalone products rarely exceed 5%. There's little benefit to pushing concentration higher given its gentle mechanism, and doing so mainly raises irritation risk without proportional payoff.
Conflicts & combinations
Stacking it with stronger AHAs or BHA in the same routine adds exfoliation load without much extra benefit and raises irritation risk, so I'd stagger them on alternate days. It pairs logically with brightening actives like tranexamic acid and alpha-arbutin, where its chelating role complements their pigment-blocking mechanisms for more consistent tone-evening results.
- hyperpigmentation
- uneven texture
- dullness
- redness
- Effective from
- 2%
- Max safe
- 5%
Is phytic acid the same as glycolic acid?
No — phytic acid is a milder organic acid with a distinct chelating action, not a classic AHA, and it exfoliates far less aggressively than glycolic acid.
Can phytic acid help with melasma?
It may help indirectly by chelating iron and copper ions that fuel oxidative pigment production, though it works best alongside dedicated brighteners.
Is phytic acid safe during pregnancy?
Data is limited; most formulators consider it low-risk at typical low percentages, but treat it with the same caution as other mild acids and check with your provider.
Can I use phytic acid with vitamin C?
Yes, and its chelating property can actually help stabilize vitamin C by binding trace metals that accelerate its oxidation.
Does phytic acid help acne?
It offers mild exfoliation that can help keep pores clear, but it isn't a primary acne treatment the way salicylic acid is.