Just for Men Shampoo-In Color Darkest Brown (H-50) Pack of 3 — Ammonia-Free, 5-Minute Gray Coverage with Keratin

Just For Men Shampoo-In Color in Darkest Brown (H-50) is a five-minute, ammonia-free shampoo-in hair color that reliably covers gray and restores a natural-looking darker tone while conditioning with keratin, olive oil, and vitamin E.

This shampoo-in system is designed for men who want fast, at-home gray coverage without a complex routine. The product focuses color on gray strands to blend seamlessly with remaining pigment, preserving natural highlights and lowlights. One box provides up to three treatments, and the formula is made to be long-lasting until new gray growth appears.

How quickly will I see results with this shampoo-in color?

Results are visible in just five minutes from application — the formula works during a short processing time so you can complete coloring in a single bathroom session. That makes it a practical option for quick touch-ups or regular maintenance between haircuts.

• Processing time: approximately 5 minutes
• Application: pour, shake, apply with included bottle
• Gloves provided to prevent staining

Will this formula damage my hair or change my natural texture?

The Shampoo-In Color is ammonia-free and includes keratin, olive oil, and vitamin E to help support hair strength and surface condition. It’s formulated to target gray hairs while leaving non-gray strands’ natural variation intact, rather than creating a flat, uniform color.

• Ammonia-free: gentler on hair cuticle compared with some permanent dyes
• Conditioning additives: help maintain smoother, fuller-looking hair
• Targets gray only: preserves natural shading and highlights

How long does the color last and how often should I reapply?

The color is permanent on the treated hairs and remains until the natural gray grows back at the roots. Many users find touch-ups needed every 6–8 weeks depending on the rate and amount of new gray growth; full repeat applications depend on coverage needs and hair length.

• Longevity: lasts until the gray regrows
• Typical touch-up interval: around 6–8 weeks
• Box yield: up to three applications per pack for most coverage needs

Which shade should I choose if I'm unsure between two colors?

If you’re deciding between two shades, selecting the lighter option first is recommended because you can always go darker later. The shampoo-in approach blends with your existing color, which helps avoid an abrupt change and makes gradual adjustment easier.

• Start lighter to minimize contrast
• Blends with natural tones to avoid a flat result
• Available in a wide range of shades for closer matches

Who is this for: This product is made for men wanting fast, at-home gray coverage with a low-effort routine — ideal if you prefer a natural-looking result without harsh chemicals. It suits those who want conditioning benefits during coloring, need occasional root touch-ups, or prefer controlling shade intensity by starting lighter and deepening later. Always perform the included allergy test 48 hours before use and follow the enclosed instructions for best results.

Ingredients

Water, Toluene-2,5-Diamine, m-Aminophenol, Ethanolamine, Keratin, Hydrolyzed Keratin, Olea Europaea (Olive) Fruit Oil, Tocopheryl Acetate, Resorcinol, Cetearyl Alcohol, Carbomer, Sodium Sulfite, p-Aminophenol, Coco-Glucoside, Erythorbic Acid, N,N-Bis(2-Hydroxyethyl)-p-Phenylenediamine Sulfate, Cetearyl Glucoside, Ceteth-10 Phosphate, Dicetyl Phosphate, 2,4-Diaminophenoxyethanol HCI, Etidronic Acid, Fragrance. Color Developer: Water, Hydrogen Peroxide, Cetearyl Alcohol, Laureth-23, Ceteareth-20, Acrylates/Steareth-20 Itaconate Copolymer, Steareth-2, Etidronic Acid, Disodium EDTA, Sodium Stannate.