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Butter London Mellow The Yellow Nail Brightening Treatment, 0.2 fl oz

Nail Care

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What the ingredients say

Read from the label order, stated amounts and each ingredient’s clinical evidence

Dimethicone, a basic moisturising ingredient, is there in a good amount.

Glycolic Acid is in, but its place on the label keeps it at 4.5% or less, short of what studies used.

no fragrance

Best-supported ingredient per concern

Skin barrierDimethiconeevidence Blikely enough
Dark spotsGlycolic Acidevidence B+below study amount
DrynessDimethiconeevidence B-likely enough
BlemishesGlycolic Acidevidence B-below study amount
LinesGlycolic Acidevidence B-below study amount
PoresGlycolic Acidevidence B-below study amount

Evidence-graded ingredients and how much is in

Dimethiconelikely enough

No amount is stated. Judging by products that state an evidence-graded ingredient at this place on the label, the chance it reaches the amount studies used is about 61%.

Skin barrier B · Dryness B-

When morning and evening · low irritation

Glycolic Acidbelow study amount

It comes after a preservative the law caps at 4.5%, so it is at most 4.5% — short of what studies used (5–10%).

Dark spots B+ · Blemishes B- · Lines B- · Pores B-

When evening · high — start 2–3 times a week

Lactic Acidbelow study amount

It comes after a preservative the law caps at 4%, so it is at most 4% — short of what studies used (5–10%).

Lines B- · Dark spots B- · Dryness C

When evening · moderate — start every other day

Tocopherol23% chance of enough

No amount is stated. Judging by 16 products that state it at this place on the label, the chance it reaches the amount studies used is about 23%.

Lines D

When morning · low irritation

How this was read

Labels list ingredients above 1% from most to least, then those at 1% or less in any order. A product filed with Korea's MFDS as functional is read as holding the notified amount of its efficacy ingredient when the label carries only one for that effect, and anything listed before an ingredient of known amount as holding at least that much. Amounts in the product name or official description are used only where the label order allows them. Where no amount is stated, the chance of reaching the study amount comes from other products that state the same ingredient at the same place on their labels. Evidence grades were set by reading each ingredient's studies.

A: several randomised trials or a meta-analysis
B: one or two randomised trials
C: uncontrolled or multi-ingredient studies
D: lab work or a record only

A reading of ingredient evidence and the label, not a guarantee that this product works.

Ingredients

Full ingredient list as published on the official product page, in descending order of content.

All 34 ingredients at a glance

By concern

Colours follow each ingredient’s use (CosIng functions); the bar counts names. Not amounts, not a safety score.

Ingredients ETHYL ACETATE, Butyl Acetate, Collodion, Acetyl Tributyl Citrate, Adipic Acid/Neopentyl Glycol/Trimellitic Anhydride Copolymer, Isopropyl Alcohol, Acrylates Copolymer, Stearalkonium Bentonite, Propylene Glycol, SILICA, Diacetone Alcohol, Etocrylene, N-Butyl Alcohol, TOCOPHERYL ACETATE (VITAMIN E), Mica, Hexanal, AQUA/WATER/EAU, Phosphoric Acid, Lithothamnion Calcareum Extract, Dimethicone, Mannitol, Trimethylsiloxysilicate, Glycolic Acid, Malic Acid, Diatomaceous Earth, Lactic Acid, Tilia Platyphyllos Leaf, CITRUS MEDICA LIMONUM (LEMON) FRUIT EXTRACT, TIN Oxide, Zinc Sulfate, Citric Acid, Tocopherol, TITANIUM DIOXIDE (CI 77891), YELLOW 5 LAKE (CI 19140)

Tap a name to see what it does and the evidence

1Ingredients