The FDA Just Approved Bemotrizinol. Here's Why Swellies Is Still Mineral-Only.

In June 2026 the FDA authorized bemotrizinol, the first new sunscreen filter approved in the US in roughly two decades. It is genuinely good news for sunscreen. So here is a fair question for a brand built on a single mineral active: does this change anything for Swellies? The honest answer is no, and it is worth explaining why.

What bemotrizinol is

Bemotrizinol is a broad-spectrum organic filter, meaning it absorbs UV rather than reflecting it like a mineral does. The FDA classified it as Generally Recognized as Safe and Effective, the same high bar that currently applies to only zinc oxide and titanium dioxide. It is photostable, so it does not break down quickly in sunlight, and studies showed low absorption into the bloodstream. Companies can begin using it in products starting in August 2026.

This matters because for years the US had a thin, dated list of filters compared with much of the world. A new, well-studied, GRASE-confirmed option is a real step forward for the category. We are not here to talk you out of it.

One filter is rarely the whole formula

Here is a practical detail the headlines skip. The FDA cleared bemotrizinol at a maximum of 6 percent. At that ceiling, on its own, it lands in the low-to-mid range, roughly SPF 15 to 20 by typical formulation math. That is not a knock on it. It is how the filter is designed to be used: as one player on a team. To reach an SPF 30 or 50, a formula has to pair bemotrizinol with other actives, most often other organic filters. So in practice the new filter usually means more filters, not fewer.

That is the quiet contrast with a mineral formula. Zinc oxide at 21 percent covers the full UVA and UVB range and carries the SPF on its own. One active, one job. A sunscreen built on absorbing filters is almost always a stack of them.

Why it does not change our formula

Swellies is mineral-only, but not because we think every chemical filter is a problem. We have always said the honest thing: the FDA asked for more data on many older filters, which is a reason for caution, not a verdict of harm. Bemotrizinol clearing the GRASE bar is exactly the kind of progress that answers those open questions.

Our reason for staying mineral is simpler, and it predates this approval. Zinc oxide already covers the full UVA and UVB range on its own. One ingredient, the whole spectrum. When a single active does the job, adding a second filter is not an upgrade for us. It is a fourth, fifth, or sixth ingredient that our formula does not need. Our whole thesis is minimum necessary, and a new filter, however good, does not change that math.

Different tools, same goal

Bemotrizinol is a good option for formulas built around absorbing filters. Zinc oxide is the tool for a formula built around one mineral that sits on the skin and covers everything. Both can make a strong sunscreen. We chose the one that lets us keep the ingredient list to five and the active to one, the two things that make Swellies what it is. More on why we hold that line here: the two actives the FDA has confirmed.

Frequently asked questions

What is bemotrizinol?

Bemotrizinol is a broad-spectrum organic (chemical) UV filter that the FDA authorized in June 2026, the first new sunscreen active approved in the US in about twenty years. It is photostable, showed low skin absorption, and was classified as Generally Recognized as Safe and Effective.

Is bemotrizinol safe?

The FDA classified bemotrizinol as Generally Recognized as Safe and Effective for adults and children six months and older, based on data including low absorption into the bloodstream. That is the same standard that applies to zinc oxide and titanium dioxide.

Is bemotrizinol better than mineral sunscreen?

It is a different tool, not a replacement. Bemotrizinol is a strong option for formulas built around absorbing filters. Mineral zinc oxide covers the full spectrum on its own and sits on the skin rather than absorbing. Which is better depends on the formula and what you want from it.

How much bemotrizinol can a sunscreen contain?

The FDA cleared bemotrizinol at a maximum of 6 percent. On its own at that ceiling it reaches a low-to-mid SPF, in the range of roughly 15 to 20 by typical formulation estimates, so it is generally combined with other filters to reach an SPF 30 or 50. It is built to work as part of a blend rather than as a formula's only active.

Will Swellies add bemotrizinol?

No. Zinc oxide already covers the full UVA and UVB range with one ingredient, so adding a second filter would only lengthen a formula built to stay at five ingredients. Our choice to stay mineral-only is about restraint, not about avoiding a specific filter.

One active. Full spectrum. Five ingredients. See Swellies →

Sources: FDA authorization of bemotrizinol reported by Scientific American, MD Anderson, and AJMC.