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Up to 25% off sitewide + FREE gifts.‡ Ends soon.
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25% off Scalp Care.‡

Visibly Thicker, Healthier
Hair in 90 Days.1

A physician-formulated and award winning serum. Reduce hair shedding while replenishing nutrients directly at the scalp for visibly fuller, thicker hair. 100% drug-free and microbiome friendly.1,2

Hair Serum

Save 25%

$36.75

A single 1 oz bottle, delivered once.

$49

Benefits

Week 1-4

  • Lightweight, fast-absorbing. Scalp feels nourished from day one.

Month 2–3

  • Hair feels stronger through the lengths and visibly less shedding.1

Month 3+

  • Visibly thicker, fuller hair. Areas that felt thin look more covered.1

Recommended Usage

Apply a full dropper directly to the scalp, section by section. Massage in gently. No rinsing needed. Use once daily for best results.

VEGANPARABEN-FREEPHTHALATE-FREESILICONE-FREESULFATE-FREEFREE OF SYNTHETIC FRAGRANCEDRUG-FREE

Reaches where other serums can’t.

Formulated with proprietary Ashwagandha Exosomes that are 1,500x smaller.

Strengthens the Scalp Barrier

Helps restore and reinforce the scalp’s natural barrier to lock in moisture and protect follicles.

Visibly Reduce Hair Breakage1

Helps strengthen, visibly improving hair shedding and hair fall in as little as 90 days.1

Lightweight, non-greasy formula

Delivers immediate scalp hydration and helps maintain it over time.

Purpose in every drop

By upcycling Ashwagandha from our Nutraceuticals, we make purposeful use of every part—so this formula is as thoughtful as it is effective.

Physician-formulated with 100% drug-free ingredients.

Ashwagandha Exosomes

Ashwagandha Exosomes

Filled with protein, RNA, and lipids for healthy-looking hair.

Irish Moss Peptides

Irish Moss Peptides

Supports more voluminous hair.

Pea Sprout Extract

Pea Sprout Extract

Promotes visibly thicker hair.

A 2-step routine for
visible results.

Most approaches address hair from one direction. This kit works from two, meaning nothing gets missed.

Fullest Hair Kit

Nutrafol's most complete approach to hair growth featuring the serum and nutraceutical, designed to work together.

Shop the Fullest Hair Kit

Not sure where to start?

Get a personalized recommendation from the brand dermatologists
trust most.

Nutrition

We’re serious about facts.
Ask away.

When will I see results from the hair serum?

With daily use, you can see a more nourished scalp and visibly thicker, stronger-feeling, healthier hair in 90 days. You may also see less breakage and more density.

Does the hair serum work faster than Nutrafol’s hair growth supplements?

No, our hair serum was formulated to provide direct scalp support for visibly thicker hair. It complements Nutrafol's Hair Growth Nutraceuticals that target key root causes of hair thinning from within.

How long does a bottle of the hair serum last?

This is a bit different for everyone. One bottle typically lasts 1-3 months. If you’re applying it to the entire scalp, it will last closer to one month. When using the serum just in specific areas of concern, the bottle will last an average of 3 months.

Can the hair serum be used on eyebrows and eyelashes?

No, our hair serum is formulated to be used on the scalp specifically. It has not been tested for safety or efficacy on eyebrows or eyelashes and should not be used in those areas.

Can the hair serum be used while pregnant or breastfeeding?

All of our scalp microbiome products, including Hair Serum, Shampoo, Conditioner, and Scalp Mask are suitable for use by pregnant and breastfeeding individuals when used as intended. If you have any questions if these products are right for you, we recommend consulting with a trusted healthcare provider before adding Nutrafol products to your hair wellness routine.

Was the hair serum tested on animals?

Our hair serum is vegan. It contains no animal product and was not tested on animals. Our tests are performed only on human volunteers!

When should I apply the hair serum and should my hair be wet or dry?

It should be applied once a day, every day directly to the scalp or areas of concern. Since you’re focusing application on the scalp, it can be used when hair is dry or when hair is damp and towel-dried after a shower.

Have questions?

Chat with our customer support team. Monday - Friday 8am to 7pm (Eastern).

We’re here for you.

More than a supplement subscription, we’re committed to supporting you as you grow.

You can also text or call us at:

Or reach us via email at:

‡Sitewide offer; gifts are available only with qualifying subscription purchases of a new Nutraceutical subscription, including duos. Limited time only for purchases made on nutrafol.com by September 7, 2026 at 11:59 p.m. PST, for new customers only, age 18 or older. Monthly subscriptions receive 20% off the first subscription payment only; 3-month and 6-month subscriptions receive 25% off the first subscription payment only. One-time purchase Scalp Care products receive 25% off; no gift is included with a Scalp Care purchase. Women’s monthly subscriptions receive a complimentary 2 oz Shampoo and 2 oz Conditioner (est. value $26); Women’s 3-month and 6-month subscriptions receive a complimentary 2 oz Shampoo, 2 oz Conditioner, and 1 oz Mask (est. value $41). Men’s monthly subscriptions receive a complimentary 2 oz Active Cleanse (est. value $13); Men’s 3-month and 6-month subscriptions receive a complimentary 2 oz Active Cleanse and 5 ml Hair Serum (est. value $28). Gifts are one-time deliveries only, non-refundable, and not exchangeable for cash or product. Canceling or deferring your subscription will cause you to forfeit the gift. While supplies last. Discount automatically applied at checkout. Max one offer per customer; cannot be combined with other offers or sales. Valid only on orders shipped within the United States. Void where prohibited. By participating, you agree to Nutrafol’s Terms of Use.

1. Nutrafol, Data on File, 2023. 2. Certified microbiome-friendly by MyMicrobiome. 3. Townsend et al., J Clin Aesth Dermatol, 2023. 4. Based on a clinical study with a total of 34 women aged 34-55.