Mary Kay Lash & Brow Building Serum®

.15 fl. oz.


This product is not currently available online. Contact your Independent Beauty Consultant to check availability.

Improves the overall appearance of lashes, leaves brows looking healthier. See results in just 30 days.

  • Lashes seem more voluminous.
  • Lashes look maximized
  • Brows look healthier.

All prices are suggested retail.

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  • Overview
  • Application Tips
  • Key Ingredients
  • Claims and Benefits

Mary Kay Lash & Brow Building Serum®

Turn lash envy into lashes that look fuller, look thicker, look maximized. Turn problem brows into the healthy, natural-looking brows you want. All it takes is just seconds a night – and in just 30 days you’ll see the results that women everywhere are already talking about.

Mary Kay Lash & Brow Building Serum® is formulated to help lashes and brows live up to their fullest potential. Lashes appear more voluminous and look renewed, and brows look healthier. This gentle, fast-drying serum is powered by our Lash Response™ Complex, an essential nutrient boost of amino acids, a peptide and red clover extract. The appearance of lashes and brows is improved.

Application Tips

  • Apply at night after removing makeup and contact lenses.
  • Apply as you would a liquid eyeliner along the lashline.
  • Apply the formula to sparse or bare areas of the eyebrows in the direction of hair growth.

Key Ingredients

This gentle, safe, non-drug formula contains the revitalizing Lash Response™ Complex that contains:

Amino Acids help provide essential nourishment.
Red Clover extract. Red clover is a botanical known to contain antioxidants that help neutralize free radicals.

Claims and Benefits

7 out of 10 Women Said Lashes Appeared Fuller*.

Here’s what else women told us after using Mary Kay Lash & Brow Building Serum® once a day for one month during an independent study*:

77% said it reduced lash brittleness and breakage
76% said the look of lashes was improved
65% said the look of brows was improved

*Study conducted by an independent research company during which 196 lash panelists and 95 brow panelists applied the product once a night for one month.