Biotherm Waterlover Sunmilk Spf 50
84/100 overall score
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About this sunscreen
Biotherm Waterlover Sunmilk SPF 50 is a hybrid chemical sunscreen built on Drometrizole Trisiloxane plus Tinosorb-class filters (Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine, Diethylamino Hydroxybenzoyl Hexyl Benzoate, Ethylhexyl Triazone). It is lightweight with a balanced finish, low white cast, and rarely stings, and it works well under makeup. Pore-clogging risk is low. With excellent protection it scores 84.0/100, a strong water-resistant pick.
Ingredient & SPF scores
☀️
UV protection
Excellent
100
- +12 Homosalate at #3, UV filter
- +38 Drometrizole Trisiloxane at #5, UV filter (UVA1 +13.3)
- +7.6 Ethylhexyl Salicylate at #7, UV filter
- +38.4 Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine at #8, UV filter (UVA1 +12.8)
- +28.8 Diethylamino Hydroxybenzoyl Hexyl Benzoate at #10, UV filter (UVA1 +17.6)
- +17.6 Ethylhexyl Triazone at #11, UV filter
- +16.8 Terephthalylidene Dicamphor Sulfonic Acid at #17, UV filter (UVA1 +6)
- −31 UVB coverage saturated
- −23.5 UVA2 coverage saturated
- −4.7 UVA1 coverage saturated
- +2 Label claims (SPF 50)
☢️
Health safety
Medium
60
- +100 Starting score
- −40 Homosalate at #3 (regulatory/evidence concern)
🤧
Allergens
Low
70
- +100 Starting score
- −18 Fragrance
- −12 Opaque "Fragrance", hidden allergens that can't be checked from the label
🔥
Eye sting
Low
67
- +100 Starting score
- −9 Homosalate at #3, migrates into eyes with sweat
- −6 Octisalate at #7, migrates into eyes with sweat
- −10 Volatile alcohol at #6
- −8 Fragrance
🔴
Comedogenic
Low
98
- +100 Starting score
- −1 Myristic Acid at #26, moderate comedogenic signal
- −1 Palmitic Acid at #19, moderate comedogenic signal
🍄
Fungal acne
Medium
57
- +100 Starting score
- −12 1 free fatty acids that feed Malassezia (Myristic Acid)
- −27 3 long-chain (C12+) esters that feed Malassezia (PEG-100 Stearate, Glyceryl Stearate, Sodium Stearoyl Glutamate)
- −4 2 ubiquitous fatty ingredients (Stearic Acid, Palmitic Acid), weak Malassezia signal
👕
Fabric stains
Low
75
- +100 Starting score
- −15 Uvinul A Plus (DHHB) at #10, oil-soluble UVA filter, fabric stains
- −10 Mexoryl XL at #5, oil-soluble UVA filter, fabric stains
💧
Moisture
Balanced
LightNourishing
- ← 13 Volatile alcohol at #6
- ← 3 1 sebum-absorbing powders (Zea Mays Starch)
- → 16 Glycerin at #2, the anchor humectant
✨
Finish
Balanced
MatteDewy
- ← 3 1 sebum-absorbing powders (Zea Mays Starch)
- ← 3 Volatile alcohol at #6
- → 6 1 emollient lipids (C12-15 Alkyl Benzoate)
💄
Makeup base
Good
PillsPrimer
- → 6 Quick-setting carrier (alcohol at #6), 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 (26)
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
-
2 Glycerin
Humectant, pulls water into the skin
- 16 → nourishing the anchor humectant
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Legacy UV filter (Homosalate), high in the list, a primary filter
- ↑ 12 UV protection
- ↑ 9 migrates into eyes with sweat
-
Emollient, softens and smooths skin
- 6 → dewy emollient lipid
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Modern UV filter, broad-spectrum and photostable (Mexoryl XL)
- ↑ 38 UV protection, incl. long-UVA (UVA1)
- ↑ 10 oil-soluble UVA filter, fabric stains
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Volatile alcohol, a drying solvent that can sting eyes
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Legacy UV filter (Octisalate)
- ↑ 7.6 UV protection
- ↑ 6 migrates into eyes with sweat
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Modern UV filter, broad-spectrum and photostable (Tinosorb S), low in the list, likely a minor contributor
- ↑ 38.4 UV protection, incl. long-UVA (UVA1)
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Mattifying powder, absorbs oil and blurs the finish
- light ← 3 sebum-absorbing powder
- matte ← 3 sebum-absorbing powder
-
Modern UV filter, broad-spectrum and photostable (Uvinul A Plus), low in the list, likely a minor contributor
- ↑ 28.8 UV protection, incl. long-UVA (UVA1)
- ↑ 15 oil-soluble UVA filter, fabric stains
-
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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Humectant, pulls water into the skin
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pH adjuster
-
14 Fragrance
Fragrance
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Emulsifier, keeps oil and water blended
- ↑ 9 feeds malassezia
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Occlusive, seals moisture into the skin
- ↑ 2 wax film
- ↑ 2 wax water lock
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Modern UV filter, broad-spectrum and photostable (Mexoryl SX), low in the list, likely a minor contributor
- ↑ 16.8 UV protection, incl. long-UVA (UVA1)
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18 Stearic Acid
Emollient, softens and smooths skin
- ↑ 2 minor malassezia feeder
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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
-
Emulsifier, keeps oil and water blended
- ↑ 9 feeds malassezia
-
Preservative, keeps the formula from spoiling
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Thickener and texture, structures the gel or cream
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24 Xanthan Gum
Thickener and texture, structures the gel or cream
-
Supporting ingredient
-
Emollient, softens and smooths skin
- ↑ 1 moderate comedogenic signal
- ↑ 12 feeds malassezia
Is the Biotherm Waterlover Sunmilk Spf 50 good?
It scores 84.0/100, a strong rating. It pairs excellent protection with a lightweight balanced finish and good makeup compatibility, and it is positioned as water-resistant.
Is the Biotherm Waterlover Sunmilk Spf 50 mineral or chemical?
It is a chemical sunscreen in a hybrid build, using Drometrizole Trisiloxane and Tinosorb-class filters rather than mineral Zinc Oxide or Titanium Dioxide.
Does it leave a white cast?
White cast is rated low, so it should blend in well across most skin tones.