Dr. Barbara Stürm Sun Drops SPF 50 Us Formula
65/100 overall score
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Ingredient & SPF scores
☀️
UV protection
Moderate
43
- +12 Homosalate at #1, UV filter
- +18 Ethylhexyl Methoxycinnamate at #2, UV filter
- +8 Ethylhexyl Salicylate at #3, UV filter
- +28.5 Butyl Methoxydibenzoylmethane at #4, UV filter (UVA1 +15.2)
- −6 UVB coverage saturated
- ×0.9 Limited long-UVA1 coverage
- ×0.75 Avobenzone + octinoxate degrade each other in sunlight
- +2 Label claims (SPF 50)
☢️
Health safety
Medium
44
- +100 Starting score
- −40 Homosalate at #1 (regulatory/evidence concern)
- −12.6 Octinoxate at #2, stacked (regulatory/evidence concern)
- −3.5 Avobenzone at #4, stacked (regulatory/evidence concern)
- +0 2 endocrine-scrutinized filters together
🔥
Eye sting
Medium
50
- +100 Starting score
- −16 Avobenzone at #4, migrates into eyes with sweat
- −16 Octinoxate at #2, migrates into eyes with sweat
- −9 Homosalate at #1, migrates into eyes with sweat
- −9 Octisalate at #3, migrates into eyes with sweat
🍄
Fungal acne
Medium
60
- +100 Starting score
- −12 1 polysorbate/sorbitan emulsifiers that feed Malassezia (Polysorbate 20)
- −28 2 long-chain (C12+) esters that feed Malassezia (Glyceryl Stearate, PEG-100 Stearate)
👕
Fabric stains
Medium
55
- +100 Starting score
- −45 Avobenzone at #4, reacts with iron in wash water into rust-yellow stains
💧
Moisture
Hydrating
LightNourishing
- ← 1.5 1 sebum-absorbing powders (Aluminium Starch Octenylsuccinate)
- ← 2 Volatile carriers flash off, leaving a dry finish
- → 10 Glycerin at #7, the anchor humectant
- → 2 Sodium Hyaluronate at #23, hyaluronic family
- → 1 1 strong humectants (Panthenol)
✨
Finish
Balanced
MatteDewy
- ← 1 1 sebum-absorbing powders (Aluminium Starch Octenylsuccinate)
- ← 2 Volatile carriers flash off, leaving a dry finish
💄
Makeup base
Okay
PillsPrimer
- → 2 Primer-style base, volatile silicones and dimethicone slip
- ← 0.5 Gel polymers prone to pilling under friction (Polyacrylate-13)
- ← 3 Humectant syrup tackiness
🌊
Water resistance
Not resistant
Non-water-resistantWater-resistant
- +7 1 film-forming polymers that lock the formula on for water resistance
Skincare extras
Beneficial actives this formula contains. Informational only, not part of the rating: their effect depends on a concentration the label does not disclose.
- ✨ Vitamin E
Full ingredient list (31)
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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Legacy UV filter (Homosalate), high in the list, a primary filter
- ↑ 12 UV protection
- ↑ 9 migrates into eyes with sweat
-
Legacy UV filter (Octinoxate), high in the list, a primary filter
- ↑ 18 UV protection
- ↓ 12.6 stacked (regulatory/evidence concern)
- ↑ 16 migrates into eyes with sweat
-
Legacy UV filter (Octisalate), high in the list, a primary filter
- ↑ 8 UV protection
- ↑ 9 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
-
5 Water
Solvent base, the water phase
-
Emollient, softens and smooths skin
-
7 Glycerin
Humectant, pulls water into the skin
- 10 → nourishing the anchor humectant
-
Thickener and texture, structures the gel or cream
- ↑ 7 film former
-
Emulsifier, keeps oil and water blended
-
Volatile silicone, flashes off for a light finish
- light ← 2 volatile carrier, flashes off
- matte ← 2 volatile carrier, flashes off
-
Emulsifier, keeps oil and water blended
- ↑ 14 feeds malassezia
-
Emulsifier, keeps oil and water blended
- ↑ 14 feeds malassezia
-
Mattifying powder, absorbs oil and blurs the finish
- light ← 1.5 sebum-absorbing powder
- matte ← 1 sebum-absorbing powder
-
Botanical extract
-
Preservative, keeps the formula from spoiling
-
Antioxidant, protects the formula and skin
-
Thickener and texture, structures the gel or cream
-
18 Xanthan Gum
Thickener and texture, structures the gel or cream
-
Humectant, pulls water into the skin
-
20 Benzoic Acid
Preservative, keeps the formula from spoiling
-
Humectant, pulls water into the skin
-
Emulsifier, keeps oil and water blended
-
Humectant, pulls water into the skin
- 2 → nourishing hyaluronic family
-
Emollient, softens and smooths skin
-
Emulsifier, keeps oil and water blended
- ↑ 12 feeds malassezia
-
26 Panthenol
Soothing, skin-conditioning active
- 1 → nourishing humectant
-
27 Arginine
pH adjuster
-
Humectant, pulls water into the skin
-
Botanical extract
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Botanical extract
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Botanical extract