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Tarte Knockout 10% Acid Complex Serum #1
Tarte Knockout 10% Acid Complex Serum #1

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TarteKnockout 10% Acid Complex Serum

Item 2578622

4.3 out of 5 stars. 4 reviews
Size:1.0 oz


Conscious Beauty at Ulta Beauty™

  • Vegan
  • Clean Ingredients
  • Cruelty Free

Tarte's Knockout 10% Acid Complex Serum is a 5-in-1 AHA serum with 10% glycolic & lactic acid blend for more youthful-looking skin!



  • Retexturizes, brightens, hydrates, helps improve appearance of firmness & minimizes the look of pores
  • Formulated at the ideal acid pH level of 3.7, so it's gentle on all skin types
  • No synthetic fragrances & dermatologist tested
  • IN A CONSUMER PANEL STUDY (of 32 Subjects After 2 Weeks of Use):
  • 100% said their skin looks more radiant
  • 96% said:
  • Pores appear noticeably smaller
  • Their skin looks more youthful
  • Their skin's tone & texture look improved
  • Their skin looks hydrated
  • It doesn't strip skin of moisture

Key Ingredients

  • Glycolic acid: deeply exfoliates & repairs look of dull, congested skin for a visibly radiant, healthier-looking complexion
  • Lactic acid: hydrates & gently exfoliates, promoting cellular renewal for younger, plumper-looking skin
  • Vegan squalane: known for hydrating, retaining moisture & enhancing elasticity
  • Coenzyme 10: helps promote collagen production & skin firmness while hydrating & soothing
  • Aloe: antioxidant & vitamin-rich to help soothe

Research Results

  • Vegan
  • Dermatologist tested

How To Use

  • Use once daily, day or night after cleansing.
  • Apply 2-4 drops on dry face, neck & chest.
  • Follow with your favorite moisturizer.

Warning: Keep out of reach of children. For external use only. Use only as directed. Avoid contact with eyes. If contact occurs, rinse well with water. If irritation develops, discontinue use and consult a physician.

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.


Water/Aqua/Eau, Glycolic Acid, Lactic Acid, Aloe Barbadensis Leaf Juice, Sodium Hydroxide, Propanediol, 1,2-Hexanediol, Hydroxyacetophenone, Polysorbate 20, Hydroxyethylcellulose, Caprylhydroxamic Acid, Sclerotium Gum, Squalane, Limonene, Sodium Carbonate, Citrus Grandis (Grapefruit) Peel Oil, Citric Acid, Potassium Sorbate, Sodium Benzoate, Ubiquinone, Disodium Phosphate, Polysorbate 60, Sodium Phosphate.

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