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Product shot of arey Good Night, Grey scalp serum tube on a white background. Label reads: arey® GOOD NIGHT, GREY. "A nighttime scalp serum to support hair health and pigment." 100 ml | 3.38 fl oz.
A green bottle labeled Good Night, Grey® by Arey, featuring a dropper tip, rests on a light surface with clear liquid drops nearby. This overnight scalp treatment is specially formulated to support hair health and pigment, featuring hair growth peptides designed to promote fuller, more vibrant hair.
Side-by-side comparison of a scalp before and after 4 months, showing less visible scalp and thicker hair growth in the after image—thanks to powerful hair growth peptides in Good Night, Grey® by Arey. Text reads Unretouched. No AI.
An upright tube of Arey’s Good Night, Grey® sits between pieces of driftwood on a green backdrop. Text highlights the formula’s key benefits: slowing greys, supporting growth with hair growth peptides, targeting stress-related aging, and featuring a weightless, oil-free texture.
Good Night, Grey® Study Results: 92% reported quick absorption, 87% who experience shedding reported this worked effectively at 12 weeks, and 83% stated fewer or no increase in grey hairs. Results based on a 24-week consumer perception study of 117 participants ages 25-65 across diverse ethnicities and all hair types, no adverse reactions were reported.
A graphic highlighting the benefits of Arey’s Mela-9 Complex in The Deep Treatment Duo: strengthens hair strands, slows greys, and protects the scalp, with molecule illustrations and descriptive text on a light background—perfect to pair with your favorite deep conditioner or as part of Arey’s Deep Treatment Duo for optimal results.
Diagram of a hair strand with labeled causes of greying, shedding, and scalp aging—including lifestyle, UV damage, chemical services, air pollution, bleach, stress, diet, nutrient deficiencies, and hormonal changes. The illustration also highlights potential solutions such as grey hair reversal techniques or using Arey’s Good Night, Grey® overnight scalp treatment enriched with hair growth peptides for healthier hair.
A person applies Arey’s Good Night, Grey®—a green tube of overnight scalp treatment—to their hairline. Text highlights key ingredients, including the Mela-9® Complex, spirulina, and lavender, all enhanced with hair growth peptides to nourish and care for the hair and scalp.
Close-up of scalp showing grey and white hairs, labeled to demonstrate that grey hair retains some pigment while white hair has lost all pigment—making reversing greying with targeted solutions like Arey’s Good Night, Grey® hair growth peptides especially challenging. The text emphasizes the importance of timely overnight scalp treatment for optimal results.
Three Arey haircare products are displayed with descriptions: Not Today, Grey capsules; To The Root serum—formulated with hair growth peptides; and Good Night, Grey® by Arey, a targeted overnight scalp treatment. Each product highlights benefits for hair health and grey hair reversal listed below.
Lavender, sage, eucalyptus, and bergamot are highlighted as key notes in Arey’s Good Night, Grey®, with upper text emphasizing clean, natural ingredients including hair growth peptides for healthy strands. A circular badge states Synthetic Fragrance Free.
A green tube labeled Arey Good Night, Grey® lies on fabric, surrounded by labels highlighting its benefits: Oil-Free, Nighttime-Activated, Color-Safe, Dermatologist-Tested, Vegan, Non-Greasy, Residue-Free, and a Calming Scent. This overnight scalp treatment from Arey features hair growth peptides to nourish your scalp while you sleep.
A person applies Arey’s Good Night, Grey® serum to their scalp using a precision nozzle. Step-by-step usage instructions appear beside them. A Pro Tip box suggests pairing it with a daily supplement or integrating it into an overnight scalp treatment for best results.
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Product shot of arey Good Night, Grey scalp serum tube on a white background. Label reads: arey® GOOD NIGHT, GREY. "A nighttime scalp serum to support hair health and pigment." 100 ml | 3.38 fl oz.

Good Night, Grey® — Overnight Hair Serum

4.6
Rated 4.6 out of 5 stars
36 Reviews

Slows Greys | Improves Density | Oil-Free

A lightweight overnight scalp serum powered by clinically effective peptides designed to slow the signs of aging hair. It reduces greys, helps preserve natural hair color, improves density and supports the scalp microbiome. Oil-free. Includes an all natural eucalyptus + lavender scent for a calming nighttime ritual.

$52.70
$52.70/month

A 1-month supply delivered every month.
Free shipping. Pause or cancel anytime.

Most Popular

$124
$41.33/month

A 3-month supply delivered every 3 months.
Free shipping. Pause or cancel anytime.

Best Value

$232.50
$38.75/month

A 6-month supply delivered every 6 months.
Free shipping. Pause or cancel anytime.

We recommend 3-6 months of consistent use to see results.

FREE Gifts with Subscription

Enhance and elevate your routine.

$100
valueArey Scalp Brush on cream background showing the bristle side. The dark wood brush has metal nickel-plated bristles on a natural rubber cushion base, with the arey brand name on the handle. Product shot of Arey Mend hair treatment tube on a white/cream background. Label reads: arey® Mend. "A nourishing cream to moisturize and seal the cuticle with heat protection". All hair types. 60ml/2 fl oz. Gray cap with 'NOT TODAY' text on a white background

WHAT IS IT?

 

Good Night, Grey® is an overnight scalp serum designed for aging hair and pigment support. It works by supporting the scalp, addressing stress-related damage, improve pigment production, and strengthen follicles, all while you sleep. Think of it as night cream for your scalp.

Powered by clinically studied ingredients, it helps:

  • Support the anagen (growth) phase so hair has more time to grow stronger and fuller
  • Defend against oxidative stress that can contribute to thinning and greying
  • Support melanin activity at the root to help preserve natural color

And because it’s oil-free and residue-free, it won’t weigh hair down, disrupt your style, or require a morning rinse. Apply at night. Wake up and go.

HOW TO USE

 

Before bed:

  1. Shake well.
  2. Apply directly to the scalp using the precision nozzle, focusing on areas of concern.
  3. Massage gently with fingertips or the Arey Scalp Brush to distribute evenly.
  4. Do not rinse. Apply before bed and allow the formula to work on your hair while you sleep.

Pro Tips:

  1. Keep the bottle visible on your counter. Habits form faster when they’re easy to see.
  2. Breathe in calming lavender + eucalyptus as part of your nighttime ritual.

STUDIES

 

98% said it's gentle on the scalp*
92% said the product absorbs quickly*
83% reported fewer or no new grey hairs*
80% said their hair looked healthier*
68% said their hair looked fuller*

**In a 24-week consumer perception study of 117 participants ages 25–65 across diverse ethnicities and all hair types, no adverse reactions were reported.

THE SCIENCE

 

Spirulina Maxima + Chlorella Emersonii Extracts

  • Improves anagen density and total hair density.

Arey's Patented Mela-9® Complex

  • Supports melanin synthesis and antioxidant pathways associated with pigment.

Red Clover Flower Extract + Biomimetic Peptide

  • Helps support stronger follicle anchoring for healthier hair growth.

Scent with a Purpose

  • A natural blend of lavender and eucalyptus designed to create a calming nighttime experience.

INGREDIENTS

 

Water (Aqua), Trifolium Pratense (Clover) Flower Extract, Acetyl Tetrapeptide-3, Ononis Spinosa Root Extract, Avena Strigosa Seed Extract, Palmitoyl Tetrapeptide-20 Amide, Propanediol, Chlorella Emersonii Extract, Lecithin, Spirulina Maxima Extract, Citrus Reticulata (Tangerine) Fruit Extract, Acetyl Tyrosine, Pentylene Glycol, Gluconolactone, Glycerin, Butylene Glycol, Dextran, Hydroxyethylcellulose, Zanthoxylum Bungeanum Fruit Extract, Humulus Lupulus (Hops) Extract, Sesamum Indicum (Sesame) Seed Extract, Glycine Soja (Soybean) Germ Extract, Wasabia Japonica Leaf Extract, Panax Ginseng Root Extract, Rosmarinus Officinalis (Rosemary) Leaf Extract, Serenoa Serrulata Fruit Extract, Polygonum Multiflorum Root Extract, Arginine, Biotin, Caffeine, Coffea Arabica (Coffee) Seed Extract, Fragrance (Parfum* Lavandula Angustifolia (Lavender) Oil, Eucalyptus Globulus Leaf Oil, Linalyl Acetate and Linalool), Sodium Benzoate, 1,2-Hexanediol, Caprylyl Glycol

Made with 100% natural fragrance from Eucalyptus and Lavender*

*Fragrance derived from raw materials meeting ISO 9235

SHIPPING + RETURNS

 

Shipping
Free shipping on subscriptions and orders $100+ (US only). Orders ship within 7-10 business days, with tracking sent via email. Questions? Email hey@arey.com.

30-Day Money Back Guarantee (first orders)
Not right for you? You have 30 days from delivery to request a refund on your first order, no returns necessary. We'll refund each product, up to $113/order, less a $5 processing fee, to your original payment method. See full refund policy →

Returns + Refunds (all other orders)
For orders beyond your first, unopened, unused items can be returned within 15 days for a refund, less a $5 handling fee. We'll email you a prepaid label for US orders. Refunds process 5-7 business days after we receive your return. Contact hey@arey.com to start a return.

Arey works best on those who have 0-30% grey hair. Not sure what percentage you are?
DERMATOLOGIST TESTED
TRICHOLOGIST FORMULATED
COLOR SAFE
SYNTHETIC FRAGRANCE FREE
CLEAN INGREDIENTS
VEGAN + CRUELTY FREE
4.6
Rated 4.6 out of 5 stars
36 Reviews

Proven Results

BEFORE
AFTER
Close-up of a persons hairline, showing a before-and-after comparison. The left side displays thinner hair, while the right side shows thicker, fuller hair growth.
Unretouched. No AI.

"This is working. My hair is thicker, and my stylist is noticing that I have less grey. Arey is a miracle!"

- Adam S.
4 Months Good Night, Grey®
BEFORE
AFTER
Side-by-side close-ups of a persons scalp, showing thinning hair on the left and fuller, healthier hair on the right, highlighting a visible improvement in hair volume and coverage.
Unretouched. No AI.

"This sh*t is amazing! Wow. What a difference. I'd noticed my hair started feeling a little thinner, started looking a little ashy, and this has totally revived my hair!"

- Katie R.
4 Months Good Night, Grey®
BEFORE
AFTER
Side-by-side comparison of a persons hairline before and after treatment, showing less hair thinning and improved hair density in the after photo.
Unretouched. No AI.

"I started using a GLP-1 eight months ago. While I had already been seeing greying, I now had shedding. Arey slowed the shedding and made an impact on the color"

- Amanda C.
3 Months Good Night, Grey®
BEFORE
AFTER
Side-by-side close-up photos of a persons hair: the left side shows gray strands, while the right side shows the same hair with a darker, more uniform color and minimal gray.
Unretouched. No AI.

"I spent a lot of time in the sun and didn't realize till recently what an impact that has had on my hair and my skin. Arey has brought so much color back to my hair, it feels years younger."

- Tyler F.
5 Months Good Night, Grey®
Results may vary

How It Works

GOOD NIGHT, GREY

  • Slow Greys

    Slow Greys

    The Mela-9® Complex stimulates melanin synthesis and preserves pigment pathways at the follicle, helping hair keep its natural color.
  • De-Stress

    De-Stress

    Spirulina Maxima + Chlorella Emersonii Extracts address scalp stress, supporting anagen density and total hair density in subjects with stress-related telogen effluvium.
  • Strengthen & Grow

    Strengthen & Grow

    Red Clover Flower Extract and a biomimetic peptide supports the anagen (growth) phase, follicle anchoring, leading to fuller-looking hair.
  • Absorb Overnight

    Absorb Overnight

    This oil-free and residue-free overnight serum fully absorbs while you sleep. No rinse, no weigh-down. Wake up and go.
  • Scent with a Purpose

    Scent with a Purpose

    A 100% natural lavender and eucalyptus blend to signal calm to your nervous system as part of a sleep ritual. Lower cortisol at night means healthier hair over time.
GOOD NIGHT, GREY

How to Apply

How to apply Good Night, Grey® overnight scalp serum
HOW TO USE:
  • Shake well before each use.
  • Apply directly to the scalp using the precision nozzle. Start from the front of the hairline to the back of your head, focusing on areas of concern like your hairline, natural part, crown, and any visible greying or thinning.
  • Massage gently with your fingertips or the Arey Scalp Brush to distribute the formula evenly and support absorption.
  • Do not rinse. Apply before bed and allow the formula to work overnight. Wake up and style as usual — no morning wash required.

PRO TIPS:
  • Keep the bottle on your nightstand or bathroom counter. Visible reminders build lasting habits.
  • Use the Arey Scalp Brush before applying to gently part hair and prep the scalp, then again after to stimulate blood circulation.
  • Take a moment to breathe in the lavender and eucalyptus scent as part of your nighttime wind-down.
4.6
Rated 4.6 out of 5 stars
Based on 36 reviews
Write a Review (Opens in a new window)
36 reviews
  • Isabelle R.
    Verified Reviewer
    4 days ago
    Reviewing
    Good Night, Grey®
    Rated 5 out of 5 stars
    Fabulous

    I love Arey and have been using their other scalp serum. This is a relaxing nighttime ritual. It’s fabulous!

    Was this helpful?
    Arey
    3 days ago

    Thank you for your wonderful review, Isabelle! We're so thrilled to hear that Good Night, Grey® has become such a fabulous part of your nighttime ritual and that you're loving it along with To The Root. We really appreciate you being such a valued part of our community and for sharing your experience with us!

  • Pamela F.
    Verified Buyer
    3 weeks ago
    Reviewing
    Good Night, Grey®
    Rated 5 out of 5 stars
    Great product

    My hair stylist can’t believe how my gray hair hasn’t become any worse since using this product

    Was this helpful?
    Arey
    3 weeks ago

    Thank you for your wonderful review, Pamela! We're so thrilled to hear that your hair stylist has noticed such positive results with Good Night, Grey®. That's fantastic feedback, and we're so glad the product is working so well for you. We appreciate you being such a valued part of our community and for sharing your experience with us!

  • Lauren W.
    Verified Buyer
    4 weeks ago
    Reviewing
    Good Night, Grey®
    Rated 5 out of 5 stars
    Staple in my routine!

    I’ve been taking Not Today, Grey for over 3 years and love having this product for extra support! Both have really helped slow progression of and reverse greys. I’m 34 and have only had a few scattered grey hairs on my temples. So happy with my results!

    Was this helpful?
    Arey
    3 weeks ago

    Thank you for your wonderful review, Lauren! We're so thrilled to hear that you've been such a loyal member of our community for over 3 years and that you're loving the combination of Not Today, Grey™ and Good Night, Grey® for extra support. Your dedication to your routine means the world to us, we appreciate you being such a valued part of our community and for sharing your experience with us!

  • Sarah
    Verified Reviewer
    4 weeks ago
    Reviewing
    Good Night, Grey®
    Rated 5 out of 5 stars
    A Noticeable Difference

    I have been battling grays in my mid twenties. By my early thirties I stopped dying my hair because it would grow back within a week. Recently for my birthday I decided to dye it with a demi-permanent dye one more time and purchase Arey products to use. I have seen a notable difference after a month of use. I have less grey make appearances than I have before. The serum is smooth, doesn't leave my hair oily, and is easily absorbed. Coupled with the wash/condition set, I believe this product is reducing gray hair.

    Was this helpful?
    Arey
    4 weeks ago

    Thank you for your incredible review, Sarah! We're absolutely thrilled to hear that you're seeing such a noticeable difference after a month of using Good Night, Grey® alongside Wash and Smooth. It's wonderful that you're experiencing less grey, especially after your journey with dyeing. We're so glad that the serum is working perfectly for your hair - smooth, non-oily, and easily absorbed is exactly what we aim for! Your dedication to giving our products a real chance means the world to us, and we're confident that with continued use you'll keep seeing these amazing benefits. We appreciate you being such a valued part of our community and for sharing your experience with us!

  • Mikelle H.
    Verified Buyer
    1 month ago
    Reviewing
    Good Night, Grey®
    Rated 5 out of 5 stars
    Great new product

    I love this new edition to my hair care routine. Non greasy formula that absorbs well. Excited to focus on sleep and see results.

    Was this helpful?
    Arey
    1 month ago

    Thank you for your wonderful review, Mikelle! We're so happy to hear that you love this new addition to your hair care routine! It's fantastic that you're enjoying the non-greasy formula and how well it absorbs. We're excited for you to continue focusing on your sleep and see the results with consistent use. We appreciate you being such a valued part of our community and for sharing your experience with us!

Overnight Hair Serum FAQs

Good Night, Grey® is an overnight scalp serum designed for aging hair and pigment support. It works by supporting the scalp, addressing stress-related damage, improve pigment production, and strengthen follicles, all while you sleep. Think of it as night cream for your scalp.

Good Night, Grey® is designed to work overnight to nourish the hair, maintain natural hair pigmentation and reduce oxidative stress.

Good Night, Grey® uses a blend of peptides, antioxidants, and plant extracts to support antioxidant defenses and pigment pathways associated with greying.

Both products target greying at the scalp, but at different times and through different mechanisms.  

  • To The Root® is a daily, daytime serum focused on reducing oxidative stress and supporting pigment at the follicle during waking hours.
  • Good Night, Grey® is a nighttime-only treatment designed to support pigment pathways and fuller-looking hair.

Good Night, Grey® is powered by clinically studied actives, including:

  • Spirulina Maxima & Chlorella Emersonii Extracts – Helps block cortisol receptors, reduce stress-related hair loss, and support overnight cellular repair.
  • Mela-9® Complex (Patented) – Stimulates melanin synthesis, neutralizes free radicals, and helps preserve pigment at the follicle.
  • Red Clover Flower Extract + Biomimetic Peptide – Rich in biochanin A which reduces follicle inflammation and improves anchoring and growth.

Yes. Independent clinical studies on key ingredients in Good Night, Grey® demonstrated measurable improvements in pigment, density, and follicle health:

  • 88% improvement in the ratio of active growth to shedding phase with Red Clover Flower Extract + Acetyl Tetrapeptide-3*
  • 25.9% increase in anagen density and 11% improvement in density with Spirulina & Chlorella Extract Complex
  • 47% of participants saw fewer white hairs in 3 months with Palmitoyl Tetrapeptide-20 Amide**
  • 41% increase in melanin levels in grey hair after 4 months with Ononis Spinosa & Avena Strigosa Extracts
*Based on Capixyl rinse-off data
**Consumer self-assessment

With consistent nightly use, visible results may take 3–6 months. Studies on key ingredients showed improvements in pigment- and density-related measures over this timeframe, though individual results vary based on consistency of use and where you are in the greying process.

At night, shake well and apply the nozzle directly to the scalp, gently squeezing to distribute product on areas of concern from the hairline to the back of the head. Massage with your fingertips or the Arey Scalp Brush to distribute evenly.

Do not rinse. This is a leave-in treatment. Apply on hair before bed and let it work while you sleep.

No. Good Night, Grey® is oil-free, fast-absorbing, and residue-free once dry. It won’t weigh hair down or leave buildup on your scalp, pillowcase, or sheets.

Yes. Studies on key ingredients show support for anagen-phase parameters, follicle anchoring, and hair-density measures, which may help hair look thicker and fuller over time.

Yes. Good Night, Grey® is color-safe and does not contain dyes or pigments. It supports your hair’s natural color rather than altering it.

Yes. The formula is lightweight and suitable for all hair types and textures, including fine, wavy, curly, and chemically treated hair.

Absolutely. Good Night, Grey® fits seamlessly into your routine and pairs well with Not Today, Grey™, To The Root®, and the Shower Duo for a comprehensive approach to aging hair. For additional support from within, Not Today, Grey is a daily grey hair supplement with vitamins, minerals, and antioxidants to help with healthier-looking hair and support.

Good Night, Grey® is formulated to support the appearance of natural hair color. If you use oral or topical minoxidil, consult your healthcare professional before adding Good Night, Grey™ to your routine, and follow the directions for each product.

Yes. Good Night, Grey® is vegan, cruelty-free, dermatologist-tested, and scented with 100% natural lavender and eucalyptus for a calming nighttime ritual.

Have other questions or need help?
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