Everyday consumers (not a professional-only or clinical product) who are noticing early or mild thinning, or who simply want hair that looks and feels fuller and more voluminous. Any hair type can use it, and because it's sulfate- and paraben-free it's safe for color-treated hair. It's a cosmetic scalp-care shampoo, not a medicated anti-hair-loss treatment.

This shampoo is a good fit if your main concern is hair that feels thin, flat or fine rather than active, advanced hair loss — it's positioned as a gentle, everyday scalp-care cleanser rather than a medicated treatment. Its Regeniplex blend of Kakadu plum, pea peptides, clover flower, turmeric and ginseng is the brand's differentiator over a plain volumizing shampoo, and being sulfate- and paraben-free means it won't strip color or dry out the scalp with daily use. The clinical data behind it is real, but it's worth knowing it was measured using the whole 3-piece system, so pairing it with the matching conditioner and tonic is how Paul Mitchell says to get the reported results rather than expecting the shampoo alone to replicate them.

Apply a small amount to wet hair, lather, and rinse completely. Can be used daily. For the results reported in Paul Mitchell's clinical study, use together with the Regeniplex Conditioner and Regeniplex Tonic as a complete regimen rather than as a standalone shampoo.

Pros:

• Sulfate-, paraben- and gluten-free formula that's gentle enough for color-treated hair
• Built around a plant-derived Regeniplex blend aimed at scalp health, not just cleansing
• Backed by an 8-week independent clinical study (28 participants) showing improved reported volume and strength

Cons:

• The 85% result reflects the full 3-step regimen (shampoo + conditioner + tonic), not the shampoo used alone
• Contains no caffeine, biotin or saw palmetto, so it won't function like a DHT-blocking or follicle-stimulating treatment shampoo
• Benefits are cosmetic (hair looks/feels fuller) rather than a clinically positioned hair-loss treatment