Earth Rhythm Sun Serum SPF 50 UVA & UVB
81/100 overall score
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About this sunscreen
Earth Rhythm Sun Serum SPF 50 UVA & UVB is a hybrid sunscreen that pairs zinc oxide with modern chemical filters like Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine and Diethylamino Hydroxybenzoyl Hexyl Benzoate. It wears with a balanced finish and low pore-clogging potential, but white cast is commonly medium and it has a medium weight, so it is less ideal under makeup. With excellent protection and a score of 80.5 out of 100, it is a strong choice for high-SPF daily defense.
Ingredient & SPF scores
☀️
UV protection
Excellent
100
- +41 Zinc Oxide at #2, UV filter (UVA1 +18)
- +12 Homosalate at #3, UV filter
- +45.6 Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine at #4, UV filter (UVA1 +15.2)
- +34.2 Diethylamino Hydroxybenzoyl Hexyl Benzoate at #5, UV filter (UVA1 +20.9)
- −8.1 UVB coverage saturated
- −15.6 UVA2 coverage saturated
- −9.1 UVA1 coverage saturated
- +2 Label claims (SPF 50)
☢️
Health safety
Medium
60
- +100 Starting score
- −40 Homosalate at #3 (regulatory/evidence concern)
🔥
Eye sting
Low
91
- +100 Starting score
- −9 Homosalate at #3, migrates into eyes with sweat
🍄
Fungal acne
Low
79
- +100 Starting score
- −12 1 polysorbate/sorbitan emulsifiers that feed Malassezia (Polysorbate 20)
- −9 1 long-chain (C12+) esters that feed Malassezia (Glyceryl Stearate Citrate)
👕
Fabric stains
Low
70
- +100 Starting score
- −15 Uvinul A Plus (DHHB) at #5, oil-soluble UVA filter, fabric stains
- −15 Zinc Oxide at #2, white marks, worst on dark fabric (washable)
💧
Moisture
Balanced
LightNourishing
- ← 5 Zinc Oxide at #2, mild sebum absorbent
- → 4 Glycerin at #12, the anchor humectant
- → 2 Hyaluronic Acid at #14, hyaluronic family
- → 1 Humectant polyols
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Makeup base
Poor
PillsPrimer
- ← 4 Gel polymers prone to pilling under friction (Carbomer)
- ← 15 High mineral load at #2 greys under foundation
🌊
Water resistance
Not resistant
Non-water-resistantWater-resistant
Nothing flagged in the ingredient list.
How we rate 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.
- ✨ Aloe vera
- ✨ Green tea
- ✨ Ferulic acid
Full ingredient list (24)
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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Mineral UV filter (Zinc Oxide), high in the list, a primary filter
- ↑ 41 UV protection, incl. long-UVA (UVA1)
- ↑ 15 white marks, worst on dark fabric (washable)
- light ← 5 mild sebum absorbent
- pills ← 15 High mineral load greys under foundation
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Legacy UV filter (Homosalate), high in the list, a primary filter
- ↑ 12 UV protection
- ↑ 9 migrates into eyes with sweat
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Modern UV filter, broad-spectrum and photostable (Tinosorb S)
- ↑ 45.6 UV protection, incl. long-UVA (UVA1)
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Modern UV filter, broad-spectrum and photostable (Uvinul A Plus)
- ↑ 34.2 UV protection, incl. long-UVA (UVA1)
- ↑ 15 oil-soluble UVA filter, fabric stains
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Humectant, pulls water into the skin
- 1 → nourishing humectant polyol
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Soothing, skin-conditioning active
-
Emollient, softens and smooths skin
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9 Carbomer
Thickener and texture, structures the gel or cream
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Botanical extract
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11 Citric Acid
pH adjuster
-
12 Glycerin
Humectant, pulls water into the skin
- 4 → nourishing the anchor humectant
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Soothing, skin-conditioning active
-
Humectant, pulls water into the skin
- 2 → nourishing hyaluronic family
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Botanical extract
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16 Ferulic Acid
Antioxidant, protects the formula and skin
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17 Niacinamide
Soothing, skin-conditioning active
-
Emulsifier, keeps oil and water blended
- ↑ 9 feeds malassezia
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Humectant, pulls water into the skin
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20 Tea Tree Oil
Plant oil, an emollient
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Emollient, softens and smooths skin
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Emulsifier, keeps oil and water blended
- ↑ 12 feeds malassezia
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Botanical extract
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Preservative, keeps the formula from spoiling
Does Earth Rhythm Sun Serum SPF 50 leave a white cast?
White cast is commonly medium with this serum, since it includes zinc oxide alongside chemical filters. It also has a medium weight on the skin. That makes it less ideal under makeup.
Is the Earth Rhythm Sun Serum SPF 50 UVA & UVB good for oily or acne-prone skin?
It has a balanced finish and low pore-clogging potential, which is generally agreeable for acne-prone skin. It is not specifically matte, so very oily skin may prefer a different finish. Results vary by person.
Is it a good high-SPF sunscreen?
Yes, it offers excellent protection at SPF 50 and scores 80.5 out of 100. The hybrid filter blend covers UVA and UVB. The medium white cast is its main trade-off.