Finding a hair-growth serum that actually works requires the right blend of active ingredients, scalp benefits, and ease of use. Dermatologists recommend these six serums for their proven formulations and noticeable results. Here’s why we love each of them:
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TOP PICKS
Nutrafol Hair Serum – Best for Fine Hair
Why we love it: Nutrafol’s Hair Serum is packed with adaptogens, peptides, and botanical extracts that work together to strengthen hair from the root. Its lightweight formula absorbs quickly without leaving a greasy residue, making it perfect for fine hair. To use, apply a few drops directly to the scalp and massage gently, letting the serum work overnight or before styling. Added perk: the serum leaves hair feeling soft, bouncy, and fuller without weighing it down.
How to use: Apply a few drops directly to the scalp, massage gently, and let it work overnight or before styling.
Ranavat Fortifying Hair Serum – Best Pre-Shampoo
Why we love it: Ranavat’s Fortifying Hair Serum draws from Ayurvedic botanicals like amla, jasmine, and sunflower oil to nourish both the scalp and hair strands. Used before shampooing, it strengthens hair and boosts natural shine. To use, massage a generous amount into the scalp and hair 10–15 minutes before washing. The serum’s luxurious texture and subtle floral scent turn a simple pre-shampoo routine into a spa-like experience, leaving hair feeling revitalized.
How to use: Massage into scalp 10–15 minutes before shampooing for maximum effect.
ISDIN Lambdapil Hair-Density Leave-In Lotion
Why we love it: ISDIN’s Lambdapil Lotion targets thinning hair with a specialized blend that strengthens follicles and improves scalp health. Lightweight and non-greasy, it can be applied daily. Simply part your hair in sections and spray directly onto the scalp, then massage gently. Over time, the serum helps reduce shedding while supporting hair density. Bonus: it dries quickly and is invisible, so you can style your hair right afterward without any residue.
How to use: Spray onto parted sections of scalp daily, massage gently, and style as usual.
The Ordinary Multi-Peptide Treatment for Hair Density
Why we love it: The Ordinary combines peptides, caffeine, and plant extracts to stimulate follicles and promote thicker-looking hair. Apply a few drops to clean, dry, or damp scalp and massage evenly. Its fast-absorbing texture makes it simple to incorporate into any routine. Added perk: the formula is lightweight, fragrance-free, and budget-friendly, yet it delivers professional-grade results.
How to use: Apply a few drops to clean, dry, or damp scalp and massage evenly.
Vegamour GRO Hair Serum
Why we love it: Vegamour’s GRO Serum harnesses the power of plant-based stem cells, mung bean, and turmeric extracts to promote a healthier scalp environment. Apply daily by lifting hair in sections and massaging a few pumps into the scalp. Over time, hair appears fuller, stronger, and more resilient. Bonus: it’s completely vegan and free from harsh chemicals, making it perfect for clean-beauty enthusiasts.
How to use: Lift hair in sections and massage a few pumps into the scalp daily.
Aveda Invati Ultra Advanced Revitalizing Scalp Serum
Why we love it: Aveda’s serum is 94% naturally derived and features the Follicle Vitality Complex, a blend of antioxidant-rich botanicals like eclipta prostrata, alpina, and ginger. Antioxidants help protect the scalp from oxidative damage, which is critical for long-term hair health. The serum comes in a spray bottle with an extended tip for targeting hard-to-reach areas. Lift your hair in sections, spray evenly across the scalp, and go about your day. Added perk: it has Aveda’s signature Pure-Fume scent, a calming mix of lavender, sage, sandalwood, and vanilla, turning your hair routine into a sensory experience.
How to use: Spray evenly across the scalp in sections with the extended tip. Massage lightly and go about your day.
FAQ
1. Do hair-growth serums really work?
Yes! While results vary depending on hair type and scalp health, many serums contain clinically studied ingredients like peptides, minoxidil, botanical extracts, and adaptogens that strengthen follicles, reduce breakage, and improve density over time. Consistent use is key for visible results.
2. How long does it take to see results?
Most users notice improvements in thickness, shine, or reduced shedding within 2–3 months of regular use. For optimal results, follow the recommended frequency and application instructions for each serum.
3. Can I use a hair-growth serum on all hair types?
Yes! Serums like Nutrafol, The Ordinary, and Vegamour are lightweight and suitable for fine, thick, curly, or straight hair. Some formulas, like Ranavat or Aveda, may be better suited for specific concerns, such as scalp nourishment or pre-shampoo treatments.
4. Can I use multiple serums together?
It’s generally best to stick with one serum at a time to track results. However, some people alternate a pre-shampoo serum like Ranavat with a daily leave-in serum like ISDIN Lambdapil. Always check ingredient compatibility to avoid irritation.
5. Are these serums safe for sensitive scalps?
Most dermatologist-recommended serums are formulated to be gentle, but if you have a sensitive scalp, look for fragrance-free or plant-based options like Vegamour GRO or The Ordinary Multi-Peptide Serum. Always patch-test first.