7 things the data says are worth doing
and 3 that are a waste of money

335 claims · 51.6% at tier 3+ · £2,000–£5,500 · risk: low

The best-evidenced non-surgical route in the corpus: dental alignment and, in growing patients, arch expansion. Adult skeletal change is limited; the visible win is tooth position and smile.

236 claims · 36.0% at tier 3+ · £150–£600 per area · risk: medium

Fast, reversible with hyaluronidase, and the corpus's most common "instant result" claim. Migration and over-filling are the recurring regrets; the tier spread is wide because results are operator-dependent.

722 claims · 34.3% at tier 3+ · £0 · risk: low

Underrated and free: under-eye bags, skin tone and training recovery all move with sleep. The corpus mostly uses it as a mechanism for other claims rather than testing it.

226 claims · 33.6% at tier 3+ · £10–£25/mo · risk: low

Cheap, well-evidenced, and the corpus's most consistently positive hair claim. Works best on diffuse thinning and needs indefinite use; shedding in the first weeks is normal and is the #1 reason people quit.

215 claims · 30.2% at tier 3+ · £10–£200 · risk: medium

Well-evidenced, and the one skin category where prescription treatment clearly beats everything sold on the forum. Isotretinoin is effective and heavily regulated for good reason.

468 claims · 29.5% at tier 3+ · £10–£40/mo · risk: low

Creatine and vitamin D have real evidence; the rest is mostly expensive urine unless you have a deficiency. Iodine and selenium claims in the corpus come with thyroid-risk caveats.

208 claims · 28.4% at tier 3+ · £0 · risk: low

Real but small; the dramatic before/afters are lighting and sodium, not water.