Categories, compatibility, and the current evidence behind each

Haircare Knowledge Hub

Everything that used to live on one page, now organized so you can browse by category, check what plays well together, look up a specific ingredient, or find a vetted brand.

Click any cell to see the full explanation. Covers the 7 most common wash-day and styling steps.

Safe / recommended sequence

Caution — order or timing matters

Avoid combining this way

Click any cell in the matrix to see compatibility details.

Watch list

Approved

Layering order — wash day

Layering order — between washes

Golden rules

✕ Don't

✓ Do

When to pause and go back to basics

Black-owned & Latina-owned brand directory

This is the sourcing list for routine recommendations in the Hair Routine Quiz — Black-owned and Latina-owned only, no exceptions. Ownership gets rechecked periodically since acquisitions happen quietly (Mielle Organics is excluded here following its 2023 majority acquisition by Procter & Gamble).

Latina-owned additions verified via The Zoe Report and Mane Addicts Latinx-owned brand roundups.