This pick is also a top recommendation from makeup artist Dominic who says it is the secret to full and incredible looking eyebrows. “The Nu-Cil Eyebrow Boosting Serum from Obagi truly works wonders,” she says. “It features proprietary technology to fortify the brows, improve the overall health of hair follicles, and promote the appearance of thicker, more defined eyebrows. I love it because it’s science-based from a medical-grade skincare brand”. It also comes with a specially-designed smaller brush to ensure a precise and accurate applicant.
9. Best for Thickening: Biologique Recherche Lash & Brow Fortifying & Densifying Double Serum
- What we love: Stimulates growth; dual-ended applicator
- What could improve: Not as widely available
- Key ingredients: Vegetable protein, glycerin, Pisum sativum extract, malus domestica fruit cell culture extract
- Application frequency: Once or twice daily
- Who it’s best for: Those looking to grow brows and lashes
Whether it’s from over-plucking or just aging, this luxurious pick is designed to improve both thinning eyebrows and lashes through a host of growth-stimulating properties. It comes highly recommended by salon director Collin Adams, who explains how the complex-sounding ingredients work: “It uses Pisum sativum extract to stimulate hair growth and prevent future thinning, along with malus domestica fruit cell culture extract to prolong the life cycle of the current hair fiber and restores its vitality.”
We also love that the dual-ended tube has separate applicators for lashes and brows, for a more hygienic application. If you’re looking for a serum that can help simultaneously grow thicker brows, plus longer and more voluminous lashes, then this is for you.
10. Best Budget: The Ordinary Multi-Peptide Lash & Brow Serum
- What we love: Inexpensive; contains four different peptides
- What could improve: Some users say it made their hair grow too much; needs to be applied twice
- Key ingredients: Acetyl tetrapeptide-3, trifolium pratense flower extract, biotinoyl tripeptide-1, panthenol, camellia sinensis leaf extract, larix europaea wood extract, zinc chloride
- Application frequency: Twice per day
- Who it’s best for: Budget-conscious people who don’t mind two applications
Dermatologists agree that #BeautyTok may be onto something with this product. Though it may be budget-friendly, this formula is effective for both long lashes and thicker brows, because it contains an array of four different peptides—including myristoyl pentapeptide-17—designed to support hair growth, says Dr. Portela.
Users say it works so well that they have to take a break after six weeks of consistent use. “The results from using this serum were nothing short of remarkable,” says Sarah Roberts, a licensed beauty and skin care consultant. “My lashes exhibited incredible growth and improved density. Plus, I liked the serum’s lightweight, nonsticky formula.” In tests, we found it was also one of the best options for those with sensitive skin.
11. Best on Amazon: RapidBrow Eyebrow Enhancing Serum
- What we love: Works quickly; relatively inexpensive
- What could improve: Some users say they experienced skin tint
- Key ingredients: Polypeptides, biotin, panthenol, keratin, apple fruit cell extract, sweet almond extract
- Application frequency: Twice per day
- Who it’s best for: Budget-conscious people seeking eyebrow density
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