The Gap List
The shopping list to use after you’ve sorted your shelf. It gives you categories and a spending ceiling, not brand names, so you buy only the jobs your routine is actually missing.
Four rules before you shop
None of these are about which product to pick. All of them are about how many.
Where the ceilings come from. Curl Centric’s own price study: . The ceiling is the median price per ounce for that category, at a common bottle size. The top-quartile figure is where you cross into paying more than three-quarters of the market. Full breakdown: how much hair products should cost.
No brand names, deliberately. Formulas change, prices move, and what's on the shelf where you live isn't what's on the shelf where we are. A spec you can read against any bottle outlasts a list that goes stale in a season. If you want to check a particular bottle, paste its ingredients into The Label Key.
Free, and it stays free
Know someone with a full cabinet?
She’ll read her first label in about a minute, on her phone, standing in the store. There’s nothing to sign up for, and it reads her hair the same way it reads yours.
https://www.curlcentric.com/what-hair-products-do-i-need/