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The Inside-Out Set

4.3
Rated 4.3 out of 5 stars
939 Reviews

Slows Greys | Supports Repigmentation | Cleanses & Softens

Your inside-out routine for aging hair. A clinically backed supplement pairs with a pigment-preserving, color-safe shampoo and hydrating conditioner to slow grey hair growth, support repigmentation, and promote thicker, fuller hair in as little as 3–6 months with daily, consistent use in the early stages of greying.

WHAT IS IT?

 

A three-piece routine that pairs our foundational daily supplement with a pigment-preserving, color-safe shampoo and lightweight conditioner. Not Today, Grey feeds follicles from within with a physician-formulated blend of vitamins, minerals, and antioxidants that help defend natural pigment. Wash Shampoo delivers our patented Mela-9® Complex (antioxidants + a clinically proven peptide) to the scalp in a sulfate-free, creamy lather that lifts buildup without stripping. Smooth Conditioner finishes with lightweight, strand-strengthening hydration that reduces breakage and locks in moisture for slip, shine, and an air-dry that doesn’t fall flat. Use daily and consistently. Most see visible improvements in 3–6 months, especially in the early stages of greying. Color-safe, dermatologist-tested, and hypoallergenic.

WHAT'S INCLUDED?

 

1-Month Supply of Not Today, Grey Daily Supplement (60 Capsules)
Full-Size Wash Shampoo (8.45 fl. oz. / 250mL)
Full Size Smooth Conditioner (8.45 fl. oz / 250mL)

Please note: This set does not come pre-kitted in a box. All items are packaged separately.

HOW TO USE

 

1. Take two tablets of Not Today, Grey daily, preferably with food.
2. Cleanse with Wash Shampoo. Massage into scalp; rinse thoroughly. Use 3–5× per week.
3. Hydrate with Smooth Conditioner. Apply mid-lengths to ends; rinse.

Most see visible improvements in 3–6 months with consistent use, especially in early-stage greying.

STUDY RESULTS

 

After 6 months using Not Today, Grey with To The Root®:
88% saw a decrease in new grey hair growth
13% decrease in grey growth vs +10% on placebo
more participants reported thicker, fuller hair with enhanced shine

Based on a 6-month, randomized, double-blind, placebo-controlled, study of the effects of The System on the appearance of grey hair on 173 subjects, ages 28–65, all less than 25% grey. Results determined by blinded clinical counting.

After using Wash Shampoo and Smooth Conditioner:
94% reported improved hair
83% said hair felt softer
77% reported fewer new greys

Based on a 24-Week Consumer Perception Study to assess the efficacy of Arey Wash & Smooth on hair health and greying on 35 participants by an independent research team.

QUALITY + CERTIFICATIONS

 

The Inside-Out Set’s supplement component, Not Today, Grey, is made in the USA in an NSF-certified, GMP-certified, and FDA-registered facility to ensure quality, safety, and consistency. Every batch is produced to meet the highest manufacturing standards and tested for purity and potency.

These certifications ensure the supplement you take daily meets strict safety and quality standards—so you can trust it to deliver the results you expect.

INGREDIENTS

 

Wash Shampoo
Water (Aqua), Cocamidopropyl Betaine, Sodium Lauroyl Methyl Isethionate, Sodium Cocoyl Isethionate, Glycerin, Butylene Glycol, Avena Strigosa Seed Extract, Ononis Spinosa Root Extract, Palmitoyl Tetrapeptide 20 Amide, Citrus Reticulata (Tangerine) Extract, Panthenol, Fragrance (Parfum)*, Amodimethicone, Hydrolyzed Barley Protein, Coffea Arabica (Coffee) Seed Extract, Panax Ginseng Root Extract, Zanthoxylum Bungeanum Fruit Extract, Humulus Lupulus (Hops) Flower Extract, Sesamum Indicum (Sesame) Seed Extract, Wasabia Japonica Leaf Extract, Polygonum Multiflorum (Fo-Ti) Root Extract, Biotin, Caffeine, Glycine Soja (Soybean) Germ Extract, Sodium Benzoate, Potassium Sorbate, Ethylhexylglycerin, Guar Hydroxypropyltrimonium Chloride, Citric Acid, Acetyl Tyrosine, Pentylene Glycol, Gluconolactone, Sodium Benzoate

Contains: Sesame
Free of: Sulfates, Parabens, Phthalates, Synthetic Fragrance, Polyethylene Glycol, Formaldehyde and Dyes

Smooth Conditioner
Water (Aqua), Cetyl Esters, Cetyl Alcohol, Stearyl Alcohol, Sorbitol, Caprylic/Capric Triglyceride, Cetrimonium Chloride, Panthenol, Helianthus Annuus (Sunflower) Seed Extract, Squalane, Argania Spinosa Kernel Oil, Citrullus Lanatus (Watermelon) Seed Oil, Coco-Caprylate/Caprate, C9-12 Alkane, Fragrance (Parfum)*, Butyrospermum Parkii (Shea) Butter, Amodimethicone, Simmondsia Chinensis (Jojoba) Seed Oil, Hydrolyzed Barley Protein, Coffea Arabica (Coffee) Seed Extract, Glycerin, Panax Ginseng Root Extract, Zanthoxylum Bungeanum Fruit Extract, Humulus Lupulus (Hops) Flower Extract, Sesamum Indicum (Sesame) Seed Extract, Glycine Soja (Soybean) Germ Extract, Butylene Glycol, Wasabia Japonica Leaf Extract, Polygonum Multiflorum (Fo-Ti) Root Extract, Biotin, Caffeine, Isopropyl Myristate, Sodium PCA, Stearamidopropyl Dimethylamine, Behentrimonium Methosulfate, Potassium Sorbate, Sodium Benzoate, Tocopherol, Ethylhexylglycerin, Citric Acid

Contains: Sesame
Free of: Sulfates, Parabens, Phthalates, Synthetic Fragrance, Polyethylene Glycol, Formaldehyde and Dyes

Not Today, Grey Daily Supplement
Vitamin D (D3 Cholecalciferol), Vitamin B6 (Pyridoxine HCI), Folate, Vitamin B12 (Methylcobalmin), Biotin, Pantothenic Acid (D-Calcium Pantothenate), Calcium (Calcium Carbonate), Iron (Ferrous Fumarate), Selenium (Selenomethionine), Copper (Copper Gluconate)
Proprietary Blend: PABA (Para-Aminobenzoic Acid), Black Sesame Seed Extract, Fo-Ti Root.
Other Ingredients: Hypromellose, Rice Flour, Magnesium Stearate, Silica

Contains: Sesame
Free of: Sulfates, Parabens, Phthalates, Synthetic Fragrance, Polyethylene Glycol, Formaldehyde and Dyes

4.3
Rated 4.3 out of 5 stars
939 Reviews

Proven Results

Results may vary

How it Works

Wash Shampoo

  • Stimulate

    A clinically efficacious peptide helps with repigmentation by stimulating the MC1-R (melanocortin 1 receptor).
  • Prepare

    Wasabi extract, sesame seed extract and zanthoxylum bungeanum fruit extract work to help the active ingredients penetrate the scalp and access the follicle
  • Nourish

    Ginseng, fo-ti and caffeine provide nourishment to the root to promote cell turnover and promote healthier hair growth
  • Volumize

    Panthenol plays a role in activating the proliferation of cells in the skin barrier, and also helps bind water to the skin and hair, balancing and adding volume

Smooth Conditioner

  • Nourish

    Hydrolyzed barley protein and coffee extract work together to build internal strength in the hair strand
  • Protect

    Jojoba and shea butter work to seal the cuticle and protect the hair from heat and environmental stress
  • Volumize

    Panthenol actively attracts and retains moisture in the hair strand, helping it look and feel more volumized

Not Today, Grey

  • Absorb

    Vitamins B6 and B9 optimize body function, setting a foundation for Arey's other ingredients to take effect.
  • Create

    Vitamin B5 promotes cell turnover and Selenium builds a defense against free radicals.
  • Energize

    Vitamin B12 and the Chinese herb Fo Ti fuel Melanin production, while Iron supports the production of red blood cells.
  • Protect

    Paba, Vitamin D & Copper help to protect hair from premature grey, while Vitamin B7 improves the protein structure of hair.
4.3
Rated 4.3 out of 5 stars
Based on 939 reviews
939 reviews
  • JULIE K.
    Verified Buyer
    2 days ago
    Reviewing
    The Shower Duo
    Rated 5 out of 5 stars
    So far so good

    I have been using The Shower Duo for a couple of months now and my hair feels smoother and looks fuller. At first, thought the products felt a little thick/sticky but I’m used to it now and it feels like there is a layer of protection on hair strands which makes me think my hair strands are getting thicker…? I’m going to try the supplements for even better results and attack the grey hair starting to appear.

    Arey
    10 minutes ago

    Thank you for your wonderful review, Julie! We're so thrilled to hear that The Shower Duo is making your hair feel smoother and look fuller - that's exactly what we love to hear! The Duo should not feel too sticky, make sure you aren't overusing the product (a little goes a long way as it is a very concentrated formula). We appreciate you being a valued member of our community and look forward to continuing to provide you with exceptional haircare solutions tailored to your needs.

  • Carol W.
    Verified Buyer
    3 days ago
    Reviewing
    The Shower Duo
    Rated 5 out of 5 stars
    The shower duo

    The shampoo and conditioner works wonders on my hair. My hair is 100% its natural color - dark blond with grey highlights. Since using the duo it is so healthy and shiny. I highly recommend this product.

    Arey
    9 minutes ago

    Thank you for your wonderful review, Carol! We're so thrilled to hear that The Shower Duo is giving you such healthy and shiny hair! We love that you're embracing your natural dark blond with grey highlights. We appreciate you being a valued member of our community and look forward to continuing to provide you with exceptional haircare solutions tailored to your needs.

  • Karmen J.
    Verified Buyer
    Age Range 47 - 56
    Percentage Grey 0%-10%
    What improvements have you noticed? (Optional) Improved texture, volume, shine, Less new grey hair, Feeling more confident
    How consistent are you with your usage? Daily
    How long have you been using the product? 6-11 months
    4 days ago
    Age Range 47 - 56
    Percentage Grey 0%-10%
    What improvements have you noticed? (Optional) Improved texture, volume, shine, Less new grey hair, Feeling more confident
    How consistent are you with your usage? Daily
    How long have you been using the product? 6-11 months
    Reviewing
    Not Today, Grey
    Rated 5 out of 5 stars
    It works

    It has been more than six months of taking these supplements and I see fewer gray hairs. Love this and will keep using it.

    Arey
    7 minutes ago

    Thank you for your wonderful review, Karmen! We're so thrilled to hear that Not Today, Grey is giving you fewer gray hairs after six months - that's exactly what we love to hear! It's fantastic that you're seeing such great results and planning to keep using it. We appreciate you being a valued member of our community and look forward to continuing to provide you with exceptional haircare solutions tailored to your needs.

  • Brigitte i.
    Verified Buyer
    Age Range 35 - 46
    Percentage Grey 10%-20%
    What improvements have you noticed? (Optional) Feeling more confident
    How consistent are you with your usage? Daily
    How long have you been using the product? 4-5 months
    1 week ago
    Age Range 35 - 46
    Percentage Grey 10%-20%
    What improvements have you noticed? (Optional) Feeling more confident
    How consistent are you with your usage? Daily
    How long have you been using the product? 4-5 months
    Reviewing
    Not Today, Grey
    Rated 5 out of 5 stars
    Great product

    Not sure if its helped with grey hair yet but I have a lot of new hair growth

    Arey
    5 days ago

    Thank you for your review, Brigitte. We're so glad to hear that Not Today, Grey is promoting such great new hair growth - that's exactly what we love to hear! For the greying results, it typically takes 3-6 months to see those changes, so you're on the right track. It's fantastic that you're already seeing positive results with your hair growth. We appreciate you being a valued member of our community and look forward to continuing to provide you with exceptional haircare solutions tailored to your needs.

  • Julie G.
    Verified Buyer
    1 week ago
    Reviewing
    The Shower Duo
    Rated 5 out of 5 stars
    'Gray shampoo'

    This pairs beautifully with aging hair!

    Arey
    5 days ago

    Thank you for your wonderful review, Julie! We're so thrilled to hear that The Shower Duo pairs beautifully with your aging hair - that's exactly what we love to hear! It's fantastic that you're getting such great results from the shampoo and conditioner working together. We appreciate you being a valued member of our community and look forward to continuing to provide you with exceptional haircare solutions tailored to your needs.