Shampoo Arena
Hair type
Dry, damaged hair
Porous, brittle hair from heat, bleach or mechanical damage.
| Ingredient | Score with vs without it | Effect | t | With | Without |
|---|---|---|---|---|---|
| Retinyl Palmitate | -806 | -24.0 | 3 | 293 | |
| Basic Blue 124 | +602 | +19.4 | 3 | 293 | |
| Methyl Benzoate | -347 | -16.8 | 3 | 293 | |
| Glyoxal | -794 | -16.6 | 5 | 291 | |
| Hydroxyethyl-2-Nitro-p-Toluidine | -338 | -16.2 | 3 | 293 | |
| Hydrolyzed Pea Protein | +662 | +12.7 | 3 | 293 | |
| Dipropylene Glycol | +613 | +12.5 | 7 | 289 | |
| Sodium Lauryl Sulfate | -551 | -12.1 | 19 | 277 | |
| Urtica Dioica Leaf Extract | -344 | -10.1 | 4 | 292 | |
| Equisetum Arvense Extract | -320 | -9.8 | 3 | 293 | |
| PEG-200 Hydrogenated Glyceryl Palmate | -313 | -9.2 | 7 | 289 | |
| Silicone Quaternium-22 | +640 | +8.9 | 3 | 293 | |
| Disodium 2-Sulfolaurate | +544 | +8.4 | 4 | 292 | |
| Hydrolyzed Keratin | +380 | +8.0 | 34 | 262 | |
| Prunus Armeniaca Kernel Oil | +367 | +7.7 | 12 | 284 | |
| Threonine | +472 | +7.7 | 11 | 285 | |
| Serine | +450 | +7.3 | 12 | 284 | |
| Prunus Amygdalus Dulcis Seed Extract | +399 | +7.3 | 6 | 290 | |
| Hydrolyzed Silk | +568 | +7.1 | 6 | 290 | |
| Alanine | +470 | +7.0 | 10 | 286 | |
| Arginine | +346 | +6.9 | 27 | 269 | |
| Sodium Xylenesulfonate | -360 | -6.8 | 40 | 256 | |
| Coconut Acid | +372 | +6.6 | 6 | 290 | |
| Glycine | +431 | +6.6 | 11 | 285 | |
| Caprylyl Glycol | +354 | +6.5 | 18 | 278 | |
| Aspartic Acid | +479 | +6.5 | 9 | 287 | |
| Valine | +479 | +6.5 | 9 | 287 | |
| Isoleucine | +479 | +6.5 | 9 | 287 | |
| Proline | +479 | +6.5 | 9 | 287 | |
| Phenylalanine | +479 | +6.5 | 9 | 287 |
Effect is the difference in mean score (Elo points) between ranked shampoos that contain the ingredient and those that do not; |t| above about 2 is unlikely to be chance alone.