Biotherm Lait Solaire Hydratant Spf 30
73/100 overall score
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Ingredient & SPF scores
☀️
UV protection
Good
77
- +15.2 Octocrylene at #4, UV filter
- +7.6 Ethylhexyl Salicylate at #5, UV filter
- +28.5 Butyl Methoxydibenzoylmethane at #6, UV filter (UVA1 +15.2)
- +17.6 Ethylhexyl Triazone at #11, UV filter
- +19.8 Titanium Dioxide at #17, UV filter (UVA1 +3)
- +8.4 Terephthalylidene Dicamphor Sulfonic Acid at #24, UV filter (UVA1 +3)
- −14.2 UVB coverage saturated
- −6.7 UVA2 coverage saturated
- +1 Label claims (SPF 30)
☢️
Health safety
High
67
- +100 Starting score
- −30 Octocrylene at #4 (regulatory/evidence concern)
- −3.5 Avobenzone at #6, stacked (regulatory/evidence concern)
🤧
Allergens
Low
67
- +100 Starting score
- −18 Fragrance
- −7 3 declared fragrance allergens
- −5 Opaque "Fragrance", hidden allergens that can't be checked from the label
- −3 Photoallergen-tail UV filters (Octocrylene)
👻
White cast
Low
97
- +100 Starting score
- −3 Titanium Dioxide at #17 (nano)
- +0.2 Coated minerals (Aluminum Hydroxide)
🔥
Eye sting
High
26
- +100 Starting score
- −16 Avobenzone at #6, migrates into eyes with sweat
- −15 Octocrylene at #4, migrates into eyes with sweat
- −6 Octisalate at #5, migrates into eyes with sweat
- −18 Volatile alcohol at #3
- −5 Alcohol high up speeds filter migration
- −8 Fragrance
- −6 3 declared fragrance allergens
🪨
Heavy feel
Low
98
- +100 Starting score
- −2 Titanium Dioxide at #17
- −2 Synthetic Wax at #15, wax film
- +1.6 Volatile alcohol at #3, evaporating texture
🔴
Comedogenic
Low
98
- +100 Starting score
- −1 Myristic Acid at #33, moderate comedogenic signal
- −1 Palmitic Acid at #18, moderate comedogenic signal
🍄
Fungal acne
Medium
66
- +100 Starting score
- −12 1 free fatty acids that feed Malassezia (Myristic Acid)
- −18 2 long-chain (C12+) esters that feed Malassezia (PEG-100 Stearate, Glyceryl Stearate)
- −4 2 ubiquitous fatty ingredients (Stearic Acid, Palmitic Acid), weak Malassezia signal
👕
Fabric stains
High
28
- +100 Starting score
- −45 Avobenzone at #6, reacts with iron in wash water into rust-yellow stains
- −15 Octocrylene at #4, co-stains alongside avobenzone
- −10 Avobenzone + Octocrylene, the classic staining pair
- −2 Titanium Dioxide at #17, white marks, worst on dark fabric (washable)
💧
Moisture
Light
LightNourishing
- ← 22 Volatile alcohol at #3
- ← 3 1 sebum-absorbing powders (Zea Mays Starch)
- → 16 Glycerin at #2, the anchor humectant
✨
Finish
Matte
MatteDewy
- ← 3 1 sebum-absorbing powders (Zea Mays Starch)
- ← 5 Volatile alcohol at #3
- ← 2 1 dry-touch emollients reduce greasy shine (Diisopropyl Sebacate)
💄
Makeup base
Good
PillsPrimer
- → 1 Primer-style base, volatile silicones and dimethicone slip
- → 10 Quick-setting carrier (alcohol at #3), fast, even canvas
- → 3 1 soft-focus powders in moderation
- → 2 Dry-touch esters, smooth fast-absorbing base
- ← 0.5 Gel polymers prone to pilling under friction (Acrylates/C10-30 Alkyl Acrylate Crosspolymer)
- ← 3.5 Humectant syrup tackiness (partly offset by the base)
🌊
Water resistance
Not resistant
Non-water-resistantWater-resistant
- +2 1 water-locking waxes
Full ingredient list (35)
What each ingredient does and how it moves each rating: green helps, red hurts, ↑ / ↓ give the direction, and ← / → shift a slider toward its ends (finish, moisture, makeup base). Auto-derived from our scoring rules and the ingredient's position.
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1 Water
Solvent base, the water phase
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2 Glycerin
Humectant, pulls water into the skin
- 16 → nourishing the anchor humectant
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Volatile alcohol, a drying solvent that can sting eyes
- ↑ 5 Alcohol high up speeds filter migration
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Legacy UV filter (Octocrylene)
- ↑ 15.2 UV protection
- ↑ 15 migrates into eyes with sweat
- ↑ 15 co-stains alongside avobenzone
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Legacy UV filter (Octisalate)
- ↑ 7.6 UV protection
- ↑ 6 migrates into eyes with sweat
-
Legacy UV filter (Avobenzone)
- ↑ 28.5 UV protection, incl. long-UVA (UVA1)
- ↓ 3.5 stacked (regulatory/evidence concern)
- ↑ 16 migrates into eyes with sweat
- ↑ 45 reacts with iron in wash water into rust-yellow stains
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Emollient, softens and smooths skin
- matte ← 2 dry-touch emollient, anti-shine
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Emollient, softens and smooths skin
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Mattifying powder, absorbs oil and blurs the finish
- light ← 3 sebum-absorbing powder
- matte ← 3 sebum-absorbing powder
-
Humectant, pulls water into the skin
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Modern UV filter, broad-spectrum and photostable (Uvinul T 150), low in the list, likely a minor contributor
- ↑ 17.6 UV protection
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pH adjuster
-
Emulsifier, keeps oil and water blended
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14 Fragrance
Fragrance
-
Occlusive, seals moisture into the skin
- ↑ 2 wax film
- ↑ 2 wax water lock
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16 Stearic Acid
Emollient, softens and smooths skin
- ↑ 2 minor malassezia feeder
-
Mineral UV filter (Titanium Dioxide), low in the list, likely a minor contributor
- ↑ 19.8 UV protection, incl. long-UVA (UVA1)
- ↑ 2 white marks, worst on dark fabric (washable)
-
Emollient, softens and smooths skin
- ↑ 1 moderate comedogenic signal
- ↑ 2 minor malassezia feeder
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Emulsifier, keeps oil and water blended
- ↑ 9 feeds malassezia
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Emulsifier, keeps oil and water blended
- ↑ 9 feeds malassezia
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21 Drometrizole
Supporting ingredient
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22 Trisiloxane
Emollient, softens and smooths skin
-
Preservative, keeps the formula from spoiling
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Modern UV filter, broad-spectrum and photostable (Mexoryl SX), low in the list, likely a minor contributor
- ↑ 8.4 UV protection, incl. long-UVA (UVA1)
-
Preservative, keeps the formula from spoiling
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Thickener and texture, structures the gel or cream
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27 Tocopherol
Antioxidant, protects the formula and skin
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28 Xanthan Gum
Thickener and texture, structures the gel or cream
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Chelator, binds stray metal ions to keep the formula stable
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Supporting ingredient
-
31 Linalool
Fragrance component, a declared allergen
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Supporting ingredient
-
Emollient, softens and smooths skin
- ↑ 1 moderate comedogenic signal
- ↑ 12 feeds malassezia
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34 Geraniol
Fragrance component, a declared allergen
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35 Citral
Fragrance component, a declared allergen