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  • Advanced Hydra Acids

Under Skin’s Advanced Hydra Acids is a hydrating illuminator balm formulated with alpha and polyhydroxy acids for cellular renewal and an exclusive calming complex to minimize discomfort when used for seven consecutive days.

Advanced Hydra Acids can be used in the treatment of a variety of conditions such as dull skin, hyperpigmentation, post inflammatory pigmentation, dark spots, melasma, dry skin, irregular texture, aging, and acne.

Advanced Hydra Acids will soothe and desensitize your skin while providing a uniform skin texture and longer lasting moisture. Under Skin’s exclusive Pro-Skin Calming helps prevent irritation from alpha-hydroxy-acids without losing efficiency in cell renovation.


  • Promotes cellular renewal with 7 consecutive days of use
  • Decreases the thickness of hyperkeratotic layer providing smooth uniform skin texture
  • Provides lasting and prolonged moisture
  • Exclusive calming complex soothes and desensitizes the skin while maintaining the efficacy of the alpha and poly-hydroxy acid blend
  • Cellular renewal up to 3x faster than physiological
  • 88% improvement of texture and luminosity
  • 77% reduction in perception of wrinkles and expression lines



Apply once a day, preferably at night. The application should be made to the face and neck, massaging gently with circular movements.


  • AHA U.SK Blend™ | glycolic acid; lactobionic acid; malic acid; mandelic acid; lactic acid.
  • Low weight hyaluronic acid
  • Pro-SkinCalming™ decreases acid discomfort
  • Rhamnose rich polysaccharides

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Under Skin

Advanced Hydra Acids

  • $99.00