NIOXIN Diamax Advanced Hair Thickening Serum — Daily Strand-Strengthening, Lightweight Volume

NIOXIN Diamax Advanced Hair Thickening Serum is a daily lightweight treatment that visibly increases individual hair strand diameter and helps protect against breakage for a fuller-looking mane.

Designed by a salon brand with decades of research in thinning hair, this serum uses NIOXIN’s HTX technology — a blend including caffeine, panthenol and niacinamide — to temporarily thicken each fiber and strengthen hair against the mechanical stresses that cause breakage. Use it after washing or on dry hair as part of a consistent routine to see thicker-looking results that last through the day and support healthier strand resilience over time.

How does this serum make hair appear thicker?

The formula builds measurable diameter around individual hairs, creating the optical and tactile impression of increased density. Ingredients in HTX deposit lightweight film and conditioning agents that sit on the hair surface without heavy residue, so volume is immediate and natural-looking.

• HTX technology forms a thin coating that enlarges each strand
• Panthenol adds body and smoothness for fuller texture
• Non-greasy finish preserves styling and natural movement
• Works on wet or dry hair for flexible application options

Will it help reduce breakage and support hair length?

Yes — by strengthening the hair shaft and improving elasticity, the serum reduces snap and split ends that shorten visible length. Regular use helps hair resist everyday damage from styling, brushing and environmental factors, contributing to longer-looking hair over time.

• Nourishing actives help reinforce fragile ends and roots
• Enhances strand resilience during combing and styling
• Protective benefits reduce the frequency of breakage-related shedding
• Compliments other NIOXIN care products for cumulative results

How do I use it in my daily hair routine?

Apply a few drops directly to targeted areas — roots, mid-lengths or ends — and distribute evenly with fingers or a comb. It can be layered under styling products and used after shampooing or on dry hair to refresh thickness and protect strands throughout the day.

• Use daily for consistent visual thickness and protection
• Apply sparingly; a little spreads across multiple sections
• Works well under leave-in conditioners or styling creams
• Suitable for all hair types and textures

What key ingredients are inside and what do they do?

HTX technology combines proven cosmetic actives that support thicker-looking hair and a healthier scalp environment. Each ingredient plays a targeted role — some boost strand diameter, others hydrate and soothe the scalp to create conditions favorable to stronger hair.

• Caffeine energizes the scalp area and supports a revitalized feeling
• Panthenol (pro-vitamin B5) improves shine, softness and flexibility
• Niacinamide helps maintain skin-barrier health on the scalp
• Lightweight conditioning agents add measurable diameter without weight

Who is this for? NIOXIN Diamax Advanced is aimed at anyone noticing finer strands, mild density loss, or frequent breakage who wants an easy, salon-grade step to thicken hair appearance and strengthen fragile fibers. It’s appropriate for all hair types and textures, and for users seeking a non-greasy, daily treatment to make hair look fuller while protecting it from everyday wear.

Ingredients

ALCOHOL DENAT., AQUA/WATER/EAU, NIACINAMIDE, PEG/PPG-20/23 DIMETHICONE, CAFFEINE, ACRYLATES/C10-30 ALKYL ACRYLATE CROSSPOLYMER, PARFUM/FRAGRANCE, GLYCERIN, TETRAHYDROXYPROPYL ETHYLENEDIAMINE, MENTHA PIPERITA (PEPPERMINT) OIL, MENTHA ARVENSIS LEAF OIL, MENTHOL, PEG-30 DIPOLYHYDROXYSTEARATE, BENZYL SALICYLATE, HEXYL CINNAMAL, TRIDECETH-6, ALPHA-ISOMETHYL IONONE, LINALOOL, LIMONENE, CITRONELLOL