Double Check exists because most beauty marketing claims sound scientific without being checked. We check them.
Skincare and makeup packaging is full of confident language — "clinically proven," "10x stronger," "cellular regeneration" — that most shoppers have no easy way to verify. The gap between what a label implies and what the actual ingredient list supports is often wide, and it's rarely in the brand's interest to close that gap for you.
Double Check reads the full ingredient list on every product we cover, checks each headline claim against what's actually formulated and what independent evidence exists, and publishes a plain verdict. Not a takedown, not an endorsement — just what holds up and what doesn't.
We pull the complete INCI ingredient list for the product, not just the two or three actives the brand highlights on the front of the bottle.
We note the specific marketing claim being made — a percentage, a named "complex," a comparative statement like "10x stronger."
Every notable ingredient gets checked against what's independently published about it — not just what the brand or its own commissioned studies say.
Each case closes with one of three verdicts, explained below, plus the specific reasoning behind it.
The core claim holds up reasonably well against the ingredient list and available evidence.
Some claims check out, others are plausible but not independently proven at the scale marketed.
The claim runs meaningfully ahead of what the ingredient list or evidence actually supports.
A "verified" stamp means the core claim holds up — not that every word on the label is literally true down to the last adjective. Each case file explains the specific reasoning.
Our Makeup section uses a lighter screen than our full skincare case files — checking for common allergens, comedogenic red flags, and formulation transparency rather than a full ingredient-by-ingredient breakdown. It's built for browsing safe picks quickly, not as a substitute for checking your own sensitivities.
Spot something inaccurate in a case file, or think we got a verdict wrong? We want to know. Ingredient science and product formulations change, and we'd rather correct a case file than leave it wrong.
We're open to brand partnerships, but on the same terms as every other case file: no paid-for verdicts, ever. If that sounds like a fit, see how we work with brands on our Partner With Us page.