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While lengthening mascaras and boosting primers can help bulk up sparse or fragile eyelashes, sometimes you need to call in additional reinforcement. That's where lash serums come in, as these pack ingredients — like biotin and panthenol — you'll probably recognise from hair (on your head) growth products. Not only do they work to condition and strengthen lashes, many of these products also help over-plucked or otherwise thinning brows look their best, too.
There are several of these non-prescription lash-growth options sold right at Sephora, so we looked through the reviews to see which ones helped other shoppers in this very same situation. See the top-rated picks with the best reviews ahead.