A SKINCARE fan has shared an affordable buy that helps them fill in their patchy brows.The beauty product doubled as a lash serum and proved to be cost-effective.2A beauty fan raved about a lash serum that filled in their bare patchesCredit: GettyMulti-Peptide Lash and Brow Serum, $14.90 from The OrdinaryRedditor Bitsandbobslol shared the beauty deal…