Earth Rhythm Mineral Sun Serum SPF 50 — Efficacy 3.7/5.0, Safety 2.4/5.0 | DemythSkin
++++
[ DemythSkin Verdict ]
Earth Rhythm Mineral Sun Serum SPF 50
Earth Rhythm

Earth Rhythm Mineral Sun Serum SPF 50

SunscreenSun Protection
Efficacy
Basic
3.7 / 5.0
Safety
Harsh
2.4 / 5.0
System Verdict
This is a flawed sunscreen formula: the UV filters are there, but the preservative system and overall skin feel undercut the product hard. I’m giving it a middling efficacy score because it does contain real sun filters (zinc oxide plus two chemical UVB filters), but the formula is not especially elegant, uses a heavy emollient base, and the listed preservative package includes multiple sensitizing preservatives that weaken the safety profile. The sunscreen performance may be acceptable on paper, but this is not a clean or notably optimized formula.
Active Ingredients Detected
S Tier: Gold StandardsHigh Clinical Proof | Skin-Transformative
Zinc Oxide
A Tier: Good BasicsProven Results
GlycerinHomosalatePrunus Amygdalus Dulcis OilTocopheryl Acetate
D Tier: Potential IrritantsBe Cautious
Ethylhexyl MethoxycinnamateCocos Nucifera OilDMDM HydantoinMethylchloroisothiazolinoneMethylisothiazolinoneAmygdalus Dulcis Oil
What Each Ingredient Does
Aqua
solvent base
Glycerin
humectant
Cetearyl Alcohol
emollient thickener
Cetearyl Glucoside
emulsifier
Zinc Oxide
mineral UV filter
Coco-Caprylate/Caprate
light emollient
Polyglyceryl-3 Polyricinoleate
emulsifier
Isostearic Acid
emulsifier
Ethylhexyl Methoxycinnamate
UVB filter
Homosalate
UVB filter
Cocos Nucifera Oil
emollient
Prunus Amygdalus Dulcis Oil
emollient
Sodium Acrylates Copolymer
thickener
Lecithin
emulsifier
Xanthan Gum
thickener
DMDM Hydantoin
preservative
Methylchloroisothiazolinone
preservative
Methylisothiazolinone
preservative
Phenoxyethanol
preservative
Amygdalus Dulcis Oil
emollient
Tocopheryl Acetate
antioxidant
Full Ingredient List (INCI)

Aqua, Glycerin, Cetearyl Alcohol, Cetearyl Glucoside, Zinc Oxide, Coco-Caprylate/Caprate, Polyglyceryl-3 Polyricinoleate, Isostearic Acid, Ethylhexyl Methoxycinnamate, Homosalate, Cocos Nucifera Oil, Prunus Amygdalus Dulcis Oil, Sodium Acrylates Copolymer, Lecithin, Xanthan Gum, DMDM Hydantoin, Methylchloroisothiazolinone, Methylisothiazolinone, Phenoxyethanol, Amygdalus Dulcis Oil, Tocopheryl Acetate

Frequently Asked

Is Earth Rhythm Mineral Sun Serum SPF 50 worth it?

Earth Rhythm Mineral Sun Serum SPF 50 scores 3.7 out of 5.0 for efficacy (Basic) and 2.4 out of 5.0 for safety (Harsh) on DemythSkin's independent ingredient analysis. This is a flawed sunscreen formula: the UV filters are there, but the preservative system and overall skin feel undercut the product hard. I’m giving it a middling efficacy score because it does contain real sun filters

What are the key active ingredients in Earth Rhythm Mineral Sun Serum SPF 50?

Earth Rhythm Mineral Sun Serum SPF 50 contains these gold-standard actives with strong clinical evidence: Zinc Oxide.

Does Earth Rhythm Mineral Sun Serum SPF 50 contain fragrance or known irritants?

DemythSkin flags these ingredients in Earth Rhythm Mineral Sun Serum SPF 50 as potential irritants: Ethylhexyl Methoxycinnamate, Cocos Nucifera Oil, DMDM Hydantoin, Methylchloroisothiazolinone, Methylisothiazolinone, Amygdalus Dulcis Oil.

How is Earth Rhythm Mineral Sun Serum SPF 50 scored?

DemythSkin grades every product on two independent axes: efficacy (whether the ingredients have clinical evidence of working) and safety (irritation and sensitisation risk). Ingredients are classified S through D against a database of over 3,000 compounds. No brand pays for a score.

Analyze on DemythSkin →

Analysis last updated: 2026-08-23. DemythSkin is an independent ingredient analyzer. Scores are computed by a deterministic rubric from published clinical evidence — no brand pays for a score.