Caffeine

What it is

Weak clinical evidence — not a hair-loss treatment

How it affects the score

Some studies or notifications exist, but evidence is limited. Scores +6 top/mid, +3 tail.

How to read it on the label

Don't choose a product on this ingredient alone — look for evidence-backed actives alongside it.

Ingredients are listed by descending concentration. Anything after the ~1% anchors (EDTA, hexanediol, preservatives) is effectively trace.

Check your own shampoo

Paste your full ingredient list to see this ingredient's position and the overall score.