Back to Serums

HA Hydrating Serum

Three weights of hyaluronic acid combined with niacinamide and lactic acid to infuse moisture deep in the layers of the skin while balancing oil production.


  • Dryness
  • Aging
  • Oily Skin
  • Pregnancy Safe

  • Provides essential moisture for all skin types
  • Balances and regulates oil production
  • Visibly plumps fine lines and softens skin

Ideal for all skin types, this non-greasy serum is rich in hyaluronic acid, one of the world’s lightest and most effective hydrators. Capable of holding nearly 1,000 times its weight in water, our fast-absorbing form of hyaluronic acid delivers its moisturizing benefits deep within the skin’s vital layers where it quenches dehydration, controls oil, and visibly plumps fine lines. HA Hydrating Serum also contains conditioning trehalose, brightening lactic acid, and oil-balancing niacinamide to improve skin health on multiple levels.


Apply about a dropper full of the HA Hydrating Serum after cleansing each morning and night. When using in a stack, apply after peels and before and after micro-rolling. When using with other serums, apply in order from thinnest to thickest, and wait for each layer to absorb before applying the next.


A smaller molecular weight of Hyaluronic Acid that penetrates into the skin more effectively for longer lasting moisturizing benefits


A form of vitamin B3 that balances, improves elasticity, and prevents water loss


An alpha hydroxy acid that exfoliates, brightens and hydrates

all ingredients

Aqua, Hyaluronic Acid, Niacinamide, Pyrus Malus (Apple) Fruit Extract, Trehalose, Propaendiol, Lactic Acid, Glycerin, Hydroxyethylcellulose, Michelia Champaca Flower Oil, Allantoin, Dipotassium Glycyrrhizate, Capryl Glycol, Polysorbate 20, Hexylene Glycol, Ethylhexylglycerin, Phenoxyethanol, Tetrasodium Glutamate Diacetate

Sunburn Alert: This product contains an alpha hydroxy acid (AHA) that may increase your skin's sensitivity to the sun and particularly the possibility of sunburn. Use a sunscreen, wear protective clothing, and limit sun exposure while using this product and for a week afterwards.

watch the video
All About Actives

Only As Effective As Their Ability To Absorb

Scientists have discovered thousands of active ingredients with proven skin benefits. But your skin can only experience those benefits if it can actually absorb the actives. Take hyaluronic acid: it can hydrate skin with up to 1000 times its weight in water. But because of its large molecular size, HA can’t penetrate thick layers of dead skin build-up. The result? Most HA just sits on the surface and dry skin stays dry. Stacking drives actives deeper. Stacking is Kerry's professional technique of combining facial tools and topical treatments to drive glow-boosting actives deeper into the skin.