Adults with fine or thinning hair that snaps and sheds from brushing, detangling or heat styling, and anyone who wants hair to look denser at the root. It is a salon-professional product, but it's used like any shampoo at home, so no special skill is needed.

It is a cosmetic shampoo: it targets breakage-related hair fall, not medical hair loss. Persistent or patchy shedding is worth discussing with a doctor or dermatologist.

Most thickening shampoos simply plump the hair shaft for a few hours. Full Rescue is built around a fixed dose of rosemary oil and niacinamide aimed at the breakage cycle that makes fine hair look thinner over time: rosemary oil to fortify at the root against brushing stress, niacinamide to keep the scalp balanced. You get the fuller look straight after washing, and the routine is designed to reduce the snapped strands you see in the brush.

Apply to wet hair and work into a lather, including at the scalp. Rinse thoroughly.

Follow with Full Rescue Conditioner. For the full routine Biolage recommends, add Full Rescue Invigorating Scalp Serum and the Densifying Leave-In Spray.

What it does well:

• Two named, measured actives (rosemary oil and niacinamide) rather than a vague botanical blend
• Leaves fine hair looking fuller at the root without a heavy conditioning feel
• Pairs directly with the Full Rescue conditioner, serum and densifying spray

Things to weigh up:

• Uses ammonium lauryl sulfate, so it lathers strongly and may feel drying on very dry or coarse hair
• The +74% breakage figure comes from the shampoo, conditioner and serum used together, not the shampoo alone
• Contains fragrance allergens such as limonene, linalool and coumarin