Every product on Jawline is scored from 0–100 on four weighted axes. The rubric is fixed before any affiliate link is added — we rank, then we monetize, never the other way around.
We're an independent research desk, not a lab. Scores are built from the published evidence on what affects jaw definition, manufacturer specifications, and large samples of verified owner reviews — then sense-checked against the mechanism. We don't take payment for placement or ranking.
Does the mechanism hold up? Masseter loading and lymphatic drainage have real support; most 'face-slimming' claims do not. We weight what the literature actually shows.
What owners actually report after weeks of real use, read across large samples of verified reviews — not a single cherry-picked anecdote.
A tool you dread is a tool you abandon. Bite feel, weight, noise, and skin friction all count here.
The single best predictor of results: are people still using it in week four? Most products fail here, and we weight it heavily.