Six drugstore skincare products, each set next to a famous pricey one that does the same kind of job, judged on the one number the front of the jar hopes you skip: the price per ounce. Some cost about a dollar an ounce next to bottles running dollars, even tens of dollars, an ounce.

This is a buying guide, plain and simple. The whole video turns on one word. When I say a cheap jar BEATS an expensive bottle, I mean it beats it on the one thing I can actually prove, the price per ounce. What a product does on your skin is between you and your dermatologist. What it costs is math, and the math is printed on the back of the package.