All things SPF

July 17, 2026

Micro-Tint: How Japanese and Korean Sunscreen Cracked the Code for (Almost) Every Skin Tone

The white cast is a Western mineral problem. Japanese and Korean formulators solved it with micro-tint, a low level of iron oxides...

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July 11, 2026

Sunscreen Ingredients to Avoid During Pregnancy

Some chemical UV filters absorb into the bloodstream, and the FDA has asked for more safety data on them. Here are the...

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July 06, 2026

Types of Hyperpigmentation: Dark Spots, Melasma, and How Sun Protection Fits

Melasma, post-acne marks, and sun spots are different problems with one shared trigger: light. Here are the types of hyperpigmentation and the...

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July 02, 2026

No Fragrance. No Chemical Filters. No Smell.

Most sunscreen smells because of chemical filters, added fragrance, and oils going rancid. Swellies has none of them. Five ingredients. No smell.

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July 01, 2026

Five Ingredients, None of Them Comedogenic.

The wrong sunscreen can make breakouts worse. Here is what makes the best sunscreen for acne-prone skin, the ingredients to avoid, and...

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June 29, 2026

Melasma Responds to Visible Light. Iron Oxides Filter It.

Melasma is triggered by visible light, not just UV, and most sunscreens only block UV. Here is what makes the best sunscreen...

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June 27, 2026

Vegan, Seed Oil-Free Sunscreen

Vegan and seed oil-free in one bottle. Five ingredients, a plant ester carrier, no tallow, no beeswax, no seed oils.

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June 21, 2026

Mineral Sunscreen Without Silicones: How to Find One

Swellies is a mineral sunscreen with no silicones anywhere in the formula, including the coating on the zinc. It is five ingredients:...

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June 19, 2026

Seed Oil-Free Sunscreen Without the Tallow

Most sunscreens are built on seed oils. Sunflower, rosehip, jojoba, raspberry. They show up across the ingredient list as carriers, emollients, and...

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