Dr. Groot Hair Thickening Shampoo — Biotin & Rosemary Oil for Thinning, Hydrating Scalp (Sulfate-Free)

Designed by hair scientists and recognized by editors and stylists, this scalp-focused shampoo aims to clear buildup, boost moisture balance, and create the appearance of fuller hair without silicones, sulfates, parabens, or gluten. Clinical testing cited improved scalp moisture and reduced residue in two weeks, and the formula is dermatologically tested and safe for color-treated hair. Below are concise answers to common shopper questions to help you decide if this product fits your routine.

How does this shampoo make hair look thicker?

The formula combines volumizing actives and a scalp-clearing approach to lift hair at the root and reduce surface buildup that can weigh strands down. Biotin and capsulated prebiotics support hair-fiber texture while rosemary oil and caffeine help invigorate the scalp environment for an instant fuller look.

• Biotin to strengthen and thicken hair fibers visually.
• Capsulated prebiotics to balance scalp microbiome and texture.
• Rosemary oil and caffeine to boost scalp vitality and root lift.
• No silicones or heavy residues to maintain natural volume.

Will it work on damaged or color-treated hair?

Yes — the shampoo is formulated to be gentle on chemically treated hair while cleansing and moisturizing. It avoids harsh sulfates and parabens, which helps protect color and reduces further drying of damaged strands.

• Safe for color-treated hair — dermatologically tested.
• Sulfate- and paraben-free to preserve hair treatments.
• Moisturizing ingredients to soften and reduce frizz.
• Helps remove residue that hides natural shine and body.

How should I use it for best results?

Use as your regular cleansing step: wet hair, massage a small amount into the scalp until it foams, then rinse well. Repeat if hair is especially oily or product-heavy; follow with a conditioner if desired to smooth lengths while keeping roots light.

• Apply directly to wet scalp and massage for 30–60 seconds.
• Rinse thoroughly to avoid build-up and preserve volume.
• Use 2–3 times weekly or as needed depending on oiliness.
• Pair with a lightweight conditioner on mid-lengths and ends.

What are the key ingredients and what do they do?

The shampoo blends targeted botanical and active ingredients chosen to clarify, hydrate, and improve hair texture. Each component plays a role in visible thickness, scalp condition, or overall manageability without leaving heavy residues.

• Biotin — supports visibly thicker, fuller-looking strands.
• Capsulated prebiotics — help rebalance scalp environment and reduce buildup.
• Rosemary oil — adds shine and helps invigorate the scalp.
• Caffeine — stimulates the scalp for a lifted root appearance.

Who is this for? Dr. Groot Hair Thickening Shampoo is suited for anyone seeking more volume and cleaner, hydrated scalp conditions — including people with thin, damaged, or dry hair and those who color-treat their hair. It fits daily or intermittent use depending on hair type and pairs well with lightweight conditioners and styling products that won’t weigh hair down. If you want a science-forward, salon-recognized option that focuses on both scalp and strand, this Korean-formulated shampoo offers a balanced approach to fuller-looking hair.

Ingredients

Salicylic Acid