For dry, flaking scalps and hair, as the pack puts it, and for anyone who wants a salon-brand shampoo that keeps visible flakes under control while leaving hair soft and shiny. It is suitable for all hair types and gentle enough to use every day, so it can replace a regular shampoo.

Many flake-control shampoos leave hair dry and dull. Scalp Relief pairs zinc pyrithione with glycerin, dimethicone and soy protein, and a cooling agent (menthoxypropanediol), so the scalp feels clean and refreshed while hair stays soft and shiny. It can be used every day and fits into a regular Redken routine.

1. Shake well before each use.
2. Apply to wet or dry hair and massage into the scalp.
3. Leave on for 5 minutes.
4. Wet hair, lather and rinse.
5. Use at least twice a week; it can be used daily. Avoid contact with the eyes and follow the directions on the pack.

Pros

• Zinc pyrithione at 1%, a well-established ingredient for keeping flakes in check
• Leaves hair soft, light and shiny rather than stripped
• Dermatologist tested and mild enough for daily use

Cons

• Not sulfate-free
• Works best when left on the scalp for about 5 minutes, which lengthens the wash
• Fragrance components (limonene, eugenol) and methylisothiazolinone can irritate sensitive skin