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INOSITOL.

Valuable CAS 87-89-8 / ANTISTATIC, HAIR CONDITIONING, HUMECTANT

Inositol is a naturally occurring sugar alcohol pivotal in cellular communication and metabolic processes. In skincare, it precisely modulates sebum production and alleviates inflammation by influencing key hormonal and insulin signaling pathways. Additionally, it functions as an effective humectant, significantly enhancing skin hydration and fortifying the skin's protective barrier.

moisturizer/humectant antistatic acne reduction sebum regulation anti-inflammatory skin barrier support pigmentation reduction skin renewal hormonal regulation support tanning enhancement hair conditioning

Science

Inositol plays a crucial role in hormonal regulation and insulin signaling, which are fundamental to optimal skin health, particularly in managing conditions like acne. It indirectly supports acne reduction by decreasing hyperandrogenism and lowering serum testosterone levels. By improving insulin sensitivity and reducing cortisol, Inositol helps to mitigate skin inflammation and the overproduction of oil, both significant contributors to acne. It directly regulates sebum production, thereby preventing pore blockage. Furthermore, Inositol promotes healthy cell turnover and regeneration, aiding in skin healing and minimizing scarring. As a humectant, it effectively draws and retains moisture, boosting skin hydration and elasticity, while its anti-inflammatory properties soothe irritated skin. Inositol can also diminish pigmentation irregularities, fostering a more uniform skin tone, and supports the integrity of the skin's lipid barrier against environmental stressors.


Research

Medium confidence
Effective range N/A
Optimal

4%

Key findings

  1. 01 A targeted clinical study utilizing a 4% topical myo-inositol (MI) peel-off mask, applied every other night over a 2-month period, resulted in a significant 45-69% reduction in mean acne counts among women diagnosed with adult female acne.

Transparency

Not commonly dusted

The Formula

Solubility
Water
Optimal pH 4 – 7
0 7 14

Stability

Inositol exhibits excellent solubility in water and remains stable within an optimal pH range of 4 to 7. Its capacity to function as an antistatic agent further contributes to product stability by neutralizing electrical charges that can lead to formulation instability.


Safety

CIR Status
Safe as used
Max tested
4%
Sensitization risk Low

The Expert Panel for Cosmetic Ingredient Safety (CIR) has concluded that Inositol is safe for cosmetic use under current practices and concentrations, specifically documented at up to 4% in face and neck applications. It holds a Generally Recognized As Safe (GRAS) designation by the FDA for food use; however, it is not approved by the FDA for over-the-counter (OTC) drug applications. A direct SCCS opinion for Inositol was not identified in the provided research.


Your Skin

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Low
Comedogenicity Unknown

Our Assessment

Valuable

Inositol is a valuable ingredient, demonstrated to significantly reduce acne at 4%, while also offering broad benefits such as hydration, sebum regulation, and anti-inflammatory support for diverse skin types.


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