++++
[ DemythSkin Verdict ]

Earth Rhythm Mineral Sun Serum
SunscreenSun Protection
Efficacy
Strong
4.0 / 5.0
Safety
Harsh
2.5 / 5.0
System Verdict
Messy sunscreen, decent idea, flawed execution. The formula gets some credit for combining zinc oxide with additional UVB filters and a humectant-rich base, but the efficacy score is dragged down by the lack of disclosed filter percentages, the presence of older-preservative irritants, and the fact that most of the soothing/moisturizing ingredients sit in a support role rather than making this a truly elegant, high-performance sunscreen. It also does not earn top marks for UV reliability because the formula details available here do not let us verify the concentration balance or photostability cleanly, so this lands in the mid-range rather than S Tier.
Active Ingredients Detected
S Tier: Gold StandardsHigh Clinical Proof | Skin-Transformative
Zinc Oxide
A Tier: Good BasicsProven Results
AquaGlycerinHomosalatePrunus Amygdalus Dulcis OilLecithinTocopheryl Acetate
B Tier: Supporting IngredientsPromising Ingredients
Cetearyl AlcoholCetearyl GlucosideCoco-Caprylate/CapratePolyglyceryl-3 PolyricinoleateIsostearic AcidSodium Acrylates CopolymerXanthan GumPhenoxyethanol
D Tier: Potential IrritantsBe Cautious
Ethylhexyl MethoxycinnamateCocos Nucifera OilDMDM HydantoinMethylchloroisothiazolinoneMethylisothiazolinoneAmygdalus Dulcis Oil
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DemythSkin is an independent ingredient analyzer. Scores are computed by a deterministic rubric from published clinical evidence — no brand pays for a score.