Would you let a sea sponge microneedle your face?

This week: the sea-sponge needles prickling their way into skincare, whether Venn's probiotic serum and a French pharmacist's do-it-all balm earn their price tags, and Vichy's £17 answer to hair loss anxiety. Purifide teams up with a Soho bagel shop to argue your breakfast didn't cause your breakout, K18 rolls a car-sized ball of hair through Manhattan, and Cotton Incorporated bets your underwear matters as much as your SPF. Then: glass skin's calmer, less demanding cousin is having a moment, and we get into what's actually behind it.