Every serum on the list, scored the same way.

The clear winner — QUA-X Complex formula, gentlest wear, fastest visible density.

Britain's best-known serum — most of QUALASH's early gains for less money.

A dermatologist favourite with the glossiest finish in the field. Pricey but proven.

Best-seller that earns it: among the strongest length gains by week twelve.

The dependable high-street pick — steady, tolerable, widely available.

The budget hero — same hero peptide as pricier serums, you just wait longer.

Gentle, prostaglandin-free and glossy — conditioning-led rather than a growth powerhouse.

The Boots-counter bestseller — respectable thickness gains at a mascara price.

A Superdrug favourite — solid conditioning, modest and less consistent length gains.

The cheapest way in — conditioning more than growth, weakest grower in the ten.