Betaine

Ingredient Type: Humectant, Osmolyte

Highlights

• Helps maintain the skin's natural moisture balance
• Supports skin during environmental stress
• Provides lightweight hydration

The Science

Betaine is a naturally occurring compound found in plants such as sugar beets. It belongs to a group of molecules known as osmolytes, which help protect cells from environmental stress by maintaining their water balance. In the skin, this means helping maintain hydration and support normal cell function when exposed to dry air, dehydration, and other environmental stressors.

As a humectant, betaine also helps attract and retain moisture in the skin. Unlike many moisturizing ingredients that primarily increase hydration, betaine helps skin adapt to changes in moisture levels by supporting its natural water balance. This helps keep skin hydrated, soft, and smooth while working well alongside other moisturizing ingredients in a skincare formulation.

Common Questions

Can betaine help sensitive skin?

Yes. Betaine is considered a gentle skincare ingredient and is commonly used in products formulated for sensitive skin. By helping maintain the skin's natural moisture balance, it can help reduce feelings of dryness and support a healthy skin barrier.

Is betaine the same as cocamidopropyl betaine?

No. Despite their similar names, they are completely different ingredients. Betaine is a humectant and osmolyte that helps maintain the skin's natural moisture balance. Cocamidopropyl betaine is a surfactant primarily used in cleansers to help remove dirt and oil while creating foam.

Did You Know?

Betaine helps plants survive drought, high salt levels, and other harsh environmental conditions by helping their cells maintain water balance. This same ability is what makes betaine a valuable ingredient in skincare.

Where You'll Find It

You'll find betaine in Dermaphilic's Daily Hydration Serum.

Last Updated: August 4, 2026

References

El Chami, C., O'Callaghan, Y. C., O'Brien, N. M., & O'Connor, T. P. (2004). The osmolyte strategy of normal human keratinocytes in maintaining cell homeostasis. Journal of Investigative Dermatology, 123(5), 990–997.

Fluhr, J. W., Darlenski, R., & Surber, C. (2020). Organic osmolytes increase expression of specific tight junction proteins in skin and alter barrier function in cultured keratinocytes. Skin Pharmacology and Physiology, 33(3), 151–159.

Mohamed, H., et al. (2025). Skin hydration and barrier-supporting ingredients in topical formulations: A review. Cosmetics, 12, 115.