The best eyebrow growth serums can give you back what years of overplucking, stress, or just getting older have taken away-no painful microblading necessary. As someone who’s dealt with thinning brows over the past few years, finding serums that actually encouraged real regrowth was a game changer. Similar to eyelash serums, over-the-counter brow products can encourage longer, thicker eyebrow hair, says Dustin Portela, DO, a board-certified dermatologist in Idaho. To find formulas that actually deliver, Glamour editors put a variety of dermatologist-recommended serums to the test, prioritizing ingredients with proven effectiveness like peptides, prostaglandin analogues, and hydrating conditioners.
Our best overall pick is RevitaBrow Advanced Eyebrow Conditioner, which consistently produced visible growth for testers, including those with sensitive skin, in four to six weeks. If you want something more budget-friendly, The Ordinary Multi-Peptide Lash and Brow Serum offers solid results with a low price point. Below, we review the eyebrow growth serums that made the biggest difference in fullness, shape, and density-no pencils required.
Top picks and what makes them effective
- RevitaBrow Advanced Eyebrow Conditioner - Best Overall. A physician-developed conditioning serum featuring peptides, biotin, green tea extract, and panthenol; typically results seen in up to 8 weeks. It’s gentle, vegan, and cruelty-free. Application is nightly, with noticeable fullness over time.
- GrandeBrow Brow-Enhancing Serum - Best for Thickening. Contains prostaglandin analogue along with hyaluronic acid and L-proline to boost density and fullness; keratin-supporting ingredients help fortify hairs. Apply nightly; results usually appear in 6-8 weeks, with potential skin-darkening considerations for those sensitive to prostaglandins.
- The Ordinary Multi-Peptide Lash and Brow Serum - Best Budget. Prostoglandin-free option enriched with multiple peptides, plant extracts, and peptides to signal follicles and support keratin infrastructure. Lightweight, easy to apply twice daily, and often lasting several months.
- Obagi Nu-Cil Eyebrow Boosting Serum - Best Multitasking. Uses dehydrolatanoprost as a prostaglandin analogue alongside biotin and panthenol; designed to condition while promoting growth, with hydration from sodium hyaluronate and antioxidant support from phenethyl caffeate.
- NeuLash NeuBrow Brow Enhancing Serum - Best Fast-Acting. Combines isopropyl cloprostenate with peptide-rich complexes to deliver noticeable results within 4-6 weeks; includes conditioning ingredients and biotin for strengthening hairs.
- Nulastin Eyebrow Serum - Best Lightweight. Peptide- and keratin-centered formula that absorbs quickly, making it easy to layer with makeup; best for daily use and subtle fullness gains over 6-12 weeks.
- Latisse - Best for Fast Hair Growth (Lashes and Brows). FDA-approved prostaglandin analogue (bimatoprost) that can extend growth cycles, but requires a prescription and has a higher risk of side effects.
In addition to these, many testers highlighted a clean, plant-based, or hormone-free option, such as Vegamour GRO and The Ordinary’s serum, for those seeking prostaglandin-free formulas. Notably, prostaglandin-containing serums can deliver quicker growth but may cause skin darkening or irritation in some users, so patch testing and dermatologist guidance are advised for sensitive skin.
Key ingredients to know
- Peptides - Signal follicles to produce keratin; strengthen hair and support the growth cycle.
- Biotin - Boosts keratin production and hair strength, supporting thicker appearance.
- Panthenol (Pro-Vitamin B5) - Conditions and moisturizes to reduce breakage and improve elasticity.
- Prostaglandin analogues - Prolong the anagen (growth) phase and can drive faster results, but carry risks like skin darkening and irritation.
- Hyaluronic acid - Hydrates and conditions brows for a healthier look.
- Botanical extracts - Green tea extract, magnolia bark, red clover, and others support follicle health and provide antioxidant protection.
How to choose based on your goals
- If you want fast results and are okay with Hormonal actives, consider prostaglandin-based serums like GrandeBrow or Latisse (with medical supervision for Latisse).
- If you prefer hormone-free formulas, look for peptide-dense serums from RevitaBrow, Vegamour GRO, The Ordinary, or SOWN Root 2 alternatives, which emphasize peptides, biotin, and plant extracts.
- For sensitive skin, select fragrance-free formulas with calming hydrators and avoid harsh adhesives or irritants; patch testing is recommended before full use.
How long to see results and how to use
Most brow serums require consistent nightly use for 8-12 weeks before noticeable fullness appears. With prostaglandin-free serums, results tend to be gradual, often appearing strongest at about 12 weeks. Begin with dry brows, apply a thin layer directly to the skin beneath the brow hairs along the natural arch, and brush through the hairs to ensure even distribution. Let the product dry completely before applying other products to avoid interference with absorption. Patience and consistency are the most important factors; skipping applications can reset progress.
For dual-use serums designed for both brows and lashes, apply along the lash line and brow line to maximize coverage, and, if guided by a dermatologist, pair with a separate lash-focused routine for comprehensive enhancement.
Common questions
- Do eyebrow serums really work? Yes, when formulated with clinically supported actives and used consistently for 8-12 weeks or longer depending on the formula.
- Can you regrow sparse eyebrows? Yes, with the right peptides, biotin, panthenol, and conditioning agents, though results vary by individual.
- Are hormone-containing brow serums the most powerful? They can deliver faster growth but carry higher risks; many users prefer prostaglandin-free options for safer long-term use.
- How long before results show? Typically 4-12 weeks, depending on the product and whether it uses prostaglandin analogues.
- What should you avoid when aiming for thicker brows? Over-plucking, harsh removers, and inconsistent application that disrupts the growth cycle.
- How long can you use a brow growth serum? Most serums are intended for long-term use with periodic breaks advised by dermatologists.
Practical notes from testers
Testers noted RevitaBrow’s strong track record across skin types, praising its gentle, conditioning formula that supported visible brow fullness in about 4-8 weeks. The Ordinary’s serum impressed with value and tolerability, especially for those seeking a prostaglandin-free option. GrandeBrow’s prostaglandin-based action delivered noticeable fullness but required careful application to avoid uneven results. Latisse remains the fastest option for dramatic growth under medical supervision, with results seen after several months and potential side effects worth discussing with a clinician. For a balance of safety, cost, and effectiveness, many users gravitate toward peptide-forward serums like The Ordinary or Vegamour GRO, supplemented by proper brow care and patience.
| Product | Best For | Typical Time to Noticeable Results | Notes |
|---|---|---|---|
| RevitaBrow Advanced | Overall, growth and conditioning | 4-8 weeks | Gentle, vegan, no strong prostaglandins |
| GrandeBrow | Thickening | 6-8 weeks | Prostaglandin analogue; watch for skin darkening |
| The Ordinary Multi-Peptide | Budget-friendly, prostaglandin-free | 8-16 weeks | Peptides + plant extracts |
| Vegamour GRO | Healthy growth without prostaglandins | 8-12 weeks | Plant-based actives |
| Latisse | Fastest growth (lashes and brows) | 4 months | Prescription required; prostaglandin analogue |
Why I Don't Use Lash Growth Serums as a Dermatologist
Whether you’re restoring brows damaged by over-plucking or simply enhancing natural fullness, choosing a serum that aligns with your skin sensitivity, price point, and desired speed of results is key. Consistency in nightly application remains the most reliable predictor of success, and setting realistic expectations helps you stay motivated through the 2-3 month journey to fuller brows.