Leaderboard/Hair loss and shedding/ingredient effects
Hair type

Hair loss and shedding

Increased shedding or thinning density, where scalp condition and follicle support matter more than how the hair feels.

Ingredient Score with vs without it Effect t With Without
Sodium Lauroyl Glutamate
+507 +20.7 9 276
Hydroxyethyl-2-Nitro-p-Toluidine
-441 -18.8 3 282
Zinc Chloride
+420 +18.5 4 281
Vegetable Oil
+465 +17.1 9 276
Phosphoric Acid
+462 +17.0 5 280
Caffeine
+448 +16.5 34 251
HC Blue No. 2
+450 +16.1 6 279
Zinc PCA
+481 +14.4 18 267
Calcium Gluconate
+426 +14.3 3 282
CI 10316
-406 -13.4 3 282
Niacinamide
+376 +12.7 56 229
Menthol
+402 +11.7 28 257
CI 45100
-377 -10.3 4 281
Sophora Flavescens Root Extract
+149 +8.7 3 282
Polygonum Multiflorum Root Extract
+149 +8.7 3 282
Morus Alba Bark Extract
+149 +8.7 3 282
Swertia Japonica Extract
+149 +8.7 3 282
Plantago Asiatica Extract
+149 +8.7 3 282
Opuntia Ficus-Indica Fruit Extract
+149 +8.7 3 282
Phellodendron Amurense Bark Extract
+149 +8.7 3 282
Portulaca Oleracea Extract
+147 +8.6 4 281
Panthenol
+252 +8.4 113 172
Hydrogenated Vegetable Oil
-150 -8.2 4 281
Zingiber Officinale Root Extract
+332 +7.8 3 282
Sodium Cocoamphoacetate
+396 +7.3 13 272
Piroctone Olamine
+269 +7.3 30 255
Retinyl Palmitate
-431 -6.6 3 282
Magnesium Chloride
-400 -6.5 12 273
Laureth-23
-316 -6.3 14 271
Magnesium Nitrate
-463 -6.2 8 277

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.