Klorane Strengthening Serum for Thinning Hair with Quinine, 3.3 fl. oz — Leave-In, Non-Greasy

Klorane Intense Strengthening Serum with Quinine is a plant-based, leave-in serum formulated to target hereditary and reactional hair thinning and help support visibly thicker, stronger hair.

This serum blends medicinal quinine with caffeine, camu-camu and biotin to address signs of thinning through a lightweight, non-greasy formula designed for both men and women. Clinically evaluated in a controlled study, the treatment showed an average reduction in the number of thinning hairs after regular use over three months. The product is delivered in a 3.3 fl. oz. pump bottle for targeted scalp application and daily convenience.

How does this serum work to support hair density?

The formula combines botanical and active ingredients to fortify hair at the root and on the scalp without weighing hair down. While individual results vary, key actives are chosen for scalp-stimulating and strengthening properties rather than cosmetic masking.

• Medicinal quinine: supports a healthier scalp environment.
• Caffeine: energizes the scalp area where applied.
• Camu-camu: a natural source of antioxidants to help protect hair fiber.
• Biotin: contributes to stronger hair structure.

How should I apply the serum for best results?

Use the pump bottle to dispense a few drops directly onto the scalp in thinning areas and gently massage until absorbed. The leave-in formula is lightweight and designed for routine use without rinsing, allowing active ingredients to work between washes.

• Apply 2–3 times per week or as directed on the package.
• Part hair to expose scalp, place drops on roots, and massage lightly.
• No rinsing required; style as usual after application.
• Consistency over weeks yields more noticeable change.

When can I expect to see a difference, and what does the evidence say?

In a clinical study referenced by the brand, participants using the serum three times weekly reported an average reduction in thinning hairs after three months. Time to visible improvement varies by individual depending on genetics, scalp condition, and regimen consistency.

• Clinical study: showed average thinning-hair reduction at three months.
• Best effects typically appear after consistent use over several months.
• Complementary care—gentle cleansing and reduced chemical stress—can help outcomes.

Is the formula suitable for both men and women, and does it feel heavy?

The serum is formulated for all genders and designed to be non-greasy so it won’t weigh hair down or leave visible residue. It’s suitable for use on most hair types, but avoid contact with eyes and consult ingredients if you have known sensitivities.

• Non-greasy, leave-in texture suitable for everyday styling.
• Formulated for hereditary and reactional thinning in men and women.
• Works on short and long hair; minimal impact on styling routine.

Who is this for: Klorane Intense Strengthening Serum with Quinine is aimed at adults experiencing hereditary or reactional hair thinning who prefer a plant-derived, cosmetic leave-in treatment. It suits those looking for a targeted scalp serum to use alongside their regular haircare routine and who want a lightweight product compatible with daily styling. If you have scalp conditions, are pregnant, or are under medical treatment for hair loss, consider consulting a healthcare professional before beginning any new regimen.