Earth Rhythm Mineral Sunserum SPF 50
67/100 overall score
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About this sunscreen
Earth Rhythm Mineral Sunserum SPF 50 is a pure mineral sunscreen using Zinc Oxide as its single broad-spectrum filter. It has a balanced, lightweight feel and is generally non-stinging, but as a zinc formula it tends toward a medium, noticeable white cast and performs poorly as a makeup base. Protection is moderate. With a score of 66.6/100 it is an acceptable mineral pick for those who prefer zinc, but the cast and makeup compatibility hold it back.
Ingredient & SPF scores
☀️
UV protection
Moderate
37
- +38.9 Zinc Oxide at #5, UV filter (UVA1 +17.1)
- ×0.9 Limited long-UVA1 coverage
- +2 Label claims (SPF 50)
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Allergens
Low
70
- +100 Starting score
- −30 Sensitizing preservatives (Methylisothiazolinone, Methylchloroisothiazolinone, DMDM Hydantoin)
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White cast
Medium
55
- +100 Starting score
- −30 Zinc Oxide at #5
- −15 Pure mineral formula
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Heavy feel
Low
67
- +100 Starting score
- −22 Zinc Oxide at #5
- −3 Coconut Oil at #9, heavy oil
- −8 Cetearyl Alcohol at #3, rich gel-network thickener
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Comedogenic
Low
93
- +100 Starting score
- −7 Coconut Oil at #9, comedogenic oil/butter
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Fungal acne
High
24
- +100 Starting score
- −42 3 oils/butters that feed Malassezia (Prunus Amygdalus Dulcis Oil, Coconut Oil, Lecithin)
- −24 1 long-chain (C12+) esters that feed Malassezia (Polyglyceryl-3 Polyricinoleate)
- −10 1 ubiquitous fatty ingredients (Cetearyl Glucoside), weak Malassezia signal
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Fabric stains
Low
90
- +100 Starting score
- −10 Zinc Oxide at #5, white marks, worst on dark fabric (washable)
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Moisture
Nourishing
LightNourishing
- ← 2 Zinc Oxide at #5, mild sebum absorbent
- → 16 Glycerin at #2, the anchor humectant
- → 4 2 emollient lipids (Prunus Amygdalus Dulcis Oil, Coconut Oil)
- → 2 1 fatty-alcohol emollients (Cetearyl Alcohol)
✨
Finish
Balanced
MatteDewy
- ← 2 1 dry-touch emollients reduce greasy shine (Coco-Caprylate/Caprate)
- → 6 2 emollient lipids (Coconut Oil, Prunus Amygdalus Dulcis Oil)
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Makeup base
Poor
PillsPrimer
- → 2 Dry-touch esters, smooth fast-absorbing base
- ← 4 Gel polymers prone to pilling under friction (Sodium Acrylates Copolymer)
- ← 2 Occlusives/waxes float the foundation
- ← 7 Humectant syrup tackiness
- ← 6 High mineral load at #5 greys under foundation
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Water resistance
Not resistant
Non-water-resistantWater-resistant
Nothing flagged in the ingredient list.
How we rate water resistance →Full ingredient list (19)
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
-
Fatty alcohol, an emollient and thickener, not the drying kind
- ↑ 8 rich gel-network thickener
- 2 → nourishing fatty-alcohol emollient
-
Emulsifier, keeps oil and water blended
- ↑ 10 minor malassezia feeder
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Mineral UV filter (Zinc Oxide)
- ↑ 38.9 UV protection, incl. long-UVA (UVA1)
- ↑ 10 white marks, worst on dark fabric (washable)
- light ← 2 mild sebum absorbent
- pills ← 6 High mineral load greys under foundation
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Emollient, softens and smooths skin
- matte ← 2 dry-touch emollient, anti-shine
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Emulsifier, keeps oil and water blended
- ↑ 24 feeds malassezia
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Emollient, softens and smooths skin
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Plant oil, an emollient
- ↑ 3 heavy oil
- ↑ 7 comedogenic oil/butter
- 2 → nourishing emollient lipid
- 3 → dewy emollient lipid
- ↑ 14 feeds malassezia
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Plant oil, an emollient
- 2 → nourishing emollient lipid
- 3 → dewy emollient lipid
- ↑ 14 feeds malassezia
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Thickener and texture, structures the gel or cream
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12 Lecithin
Emulsifier, keeps oil and water blended
- ↑ 14 feeds malassezia
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13 Xanthan Gum
Thickener and texture, structures the gel or cream
-
Preservative, keeps the formula from spoiling
-
Supporting ingredient
-
Preservative, keeps the formula from spoiling
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Preservative, keeps the formula from spoiling
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Plant oil, an emollient
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Antioxidant, protects the formula and skin
Is the Earth Rhythm Mineral Sunserum mineral or chemical?
It is a pure mineral sunscreen. It uses Zinc Oxide alone as its single broad-spectrum UV filter.
Does the Earth Rhythm Mineral Sunserum SPF 50 leave a white cast?
Somewhat. White cast is rated medium, which is common for zinc sunscreens, so blend it in well, especially on deeper skin tones.
Can I wear it under makeup?
It is not ideal. Its makeup-base performance is rated poor, so it tends to work better worn on its own than layered beneath foundation.