Biolage Color Last Shampoo
Top PickWhat We Like
- Low-pH formula helps keep the cuticle flat
- Rich lather from a small amount
- Leaves hair soft without weighing it down
- Scent is soft and fades after drying
Worth Noting
- Costs more per ounce than the budget picks
- pH
- Low pH
- Size
- 14.11 fl oz
- Color Claim
- Up to 40 washes with Color Last system
- Key Ingredient
- Soybean oil
A low pH is the least glamorous selling point a shampoo can lead with, and it's the reason Biolage Color Last sits at the top of this list. Color-treated hair has had its cuticle lifted so dye could get in; a formula on the acidic side helps that cuticle lie flat again, which is what keeps tone from rinsing away. We washed with it for several weeks and the color held while the hair stayed soft — no squeaky, stripped feeling at the rinse.
It also behaves like a shampoo rather than a treatment. A quarter-size amount lathers richly, it rinses clean in one pass, and fine hair comes out with body instead of being pressed flat against the scalp. The scent is a soft, salon-ish floral that is essentially gone once hair dries, which we prefer to formulas that keep announcing themselves at your desk all afternoon.
Thicker or heat-styled hair will want the matching conditioner; on its own this is a gentle cleanser more than a conditioner, and that's also how you approach the brand's forty-wash figure, which assumes the whole Color Last system. The bottle is 14 ounces, smaller than the liter sizes here, and it costs more per ounce than the drugstore picks.
Pair it with the Color Last conditioner and the forty-wash ceiling becomes realistic; use it alone and you get the gentler wash without quite the same staying power. We'd buy it either way — the conditioner stretches the result, it doesn't rescue it.
Bottom line: Biolage Color Last is the shampoo we recommend first: the low-pH formula keeps color looking fresh, the lather is rich from a small amount, and hair comes out soft rather than stripped.