Vanicream tops every answer it appears in
Vanicream has a small UK presence, yet both models put it first for sensitive-skin moisturiser, rosacea and gentle cleanser questions. When AI reads dermatologist roundups, the brand those experts name first takes the top spot, whatever its UK shelf presence.
Vanicream appears in 7 answers with 7 first places and an average position of 1.0. CeraVe appears in 13 answers but comes first in only 5.
UK shoppers get answers built on American sources
The most-cited sources are US news sites and a US dermatology body. UK titles and retailers barely feature, so being well known in Boots does not mean AI will recommend you.
nbcnews.com has 12 citations across 7 answers, aad.org 7 across 6, and today.com and aol.com 3 to 4 answers each. stylist.co.uk is cited in only 2 answers and boots.com in 1.
'According to dermatologists' is the headline that gets quoted
Most of the editorial pages AI cites present themselves as expert-backed. The brands named in those pages make up the shortlist.
Cited titles include 'The best drugstore moisturizers… according to dermatologists' (nbcnews), 'Best Rosacea Skin Care Products 2026, According to Dermatologists' (today.com) and 'If You Have Rosacea, Doctors Say…' (aol.com).
ChatGPT and Claude often disagree on the top pick
Claude names a longer list and gives mid-sized challengers room. ChatGPT sticks closer to a few names, so a brand's visibility depends heavily on which assistant a shopper uses.
The two models picked a different brand first on 7 of 12 questions. Cetaphil, Good Molecules, EltaMD, Paula's Choice, BYOMA and Naturium each appear in 3 Claude answers and no ChatGPT answers. CeraVe appears in 8 Claude answers against 5 ChatGPT answers.
K-beauty answers come from small niche blogs
Korean sunscreen and 'brands like Beauty of Joseon' answers cite small K-beauty review sites rather than big publications. A challenger can get onto these sites far more easily than into NBC.
gulfnews.com (3 answers), kptown.com, aesteticadvice.com (2 each), and kwaveinsider, thebaerry, curlynikki, k-touch.us and powersof10 (1 each) all list the same set: Beauty of Joseon, Anua, Round Lab, medicube, TOCOBO, Krave Beauty.