BeautyAct Skin Protecting Primer SPF30 Versus Paula's Choice Smoothing Primer Serum SPF 30

BeautyAct Skin Protecting Primer SPF30 Versus Paula's Choice Smoothing Primer Serum SPF 30

What's inside

Key Ingredients

Benefits

Concerns

Ingredients Side-by-side

Water

Homosalate

Octocrylene

Butyloctyl Salicylate

Dimethicone

Neopentyl Glycol Diheptanoate

Ethylhexyl Salicylate

Butyl Methoxydibenzoylmethane

Trihydroxystearin

Butylene Glycol

Cetyl PEG/PPG-10/1 Dimethicone

Hexyl Laurate

Polyglyceryl-4 Isostearate

Pentylene Glycol

Honokiol

Xanthan Gum

Water, Homosalate, Octocrylene, Butyloctyl Salicylate, Dimethicone, Neopentyl Glycol Diheptanoate, Ethylhexyl Salicylate, Butyl Methoxydibenzoylmethane, Trihydroxystearin, Butylene Glycol, Cetyl PEG/PPG-10/1 Dimethicone, Hexyl Laurate, Polyglyceryl-4 Isostearate, Pentylene Glycol, Honokiol, Xanthan Gum

Isododecane

Ethylhexyl Methoxycinnamate 6%

Dimethicone/Vinyl Dimethicone Crosspolymer

Homosalate 4%

Ethylhexyl Salicylate 4%

Butyl Methoxydibenzoylmethane 2%

Polysilicone-11

Bisabolol

Coffea Arabica Seed Extract

Glycyrrhiza Glabra Root Extract

Chamomilla Recutita Flower Extract

Retinyl Palmitate

Aloe Barbadensis Leaf Extract

Calluna Vulgaris Flower Extract

Camellia Sinensis Leaf Extract

Chlorella Vulgaris Extract

Caprylic/Capric Triglyceride

Physalis Angulata Extract

Pyrus Malus Fruit Extract

Diethylhexyl Syringylidenemalonate

Isododecane, Ethylhexyl Methoxycinnamate 6%, Dimethicone/Vinyl Dimethicone Crosspolymer, Butyloctyl Salicylate, Homosalate 4%, Ethylhexyl Salicylate 4%, Butyl Methoxydibenzoylmethane 2%, Polysilicone-11, Bisabolol, Coffea Arabica Seed Extract, Glycyrrhiza Glabra Root Extract, Chamomilla Recutita Flower Extract, Retinyl Palmitate, Aloe Barbadensis Leaf Extract, Calluna Vulgaris Flower Extract, Camellia Sinensis Leaf Extract, Chlorella Vulgaris Extract, Caprylic/Capric Triglyceride, Physalis Angulata Extract, Pyrus Malus Fruit Extract, Diethylhexyl Syringylidenemalonate

Alternatives

Ingredients Explained

These ingredients are found in both products.

Ingredients higher up in an ingredient list are typically present in a larger amount.

Also known as Avobenzone, this ingredient is an oil-soluble used to absorb the full spectrum of UVA rays (peak 357 nm).

It's one of the most effective UVA filters available but has a major caveat of photostability: avobenzone is susceptible to photodegradation.

This means it can lose efficacy when exposed to sunlight without the help of a stabilizing agent.

Studies show antioxidants (like vitamin E or vitamin C) and some UV filters (like octocrylene and Tinosorb S) can meaningfully improve its stability in a formulation.

The maximum allowable concentration according to regulation is 3% in the US + Canada, and 5% in the EU, Australia, China, Korea, and ASEAN countries.

It has a well-support safety profile: a comprehensive 2025 review found minimal toxicity with no evidence of carcinogenicity.

Overall, avobenzone is a safe and regulated ingredient used in sunscreen for over 40 years.

Butyloctyl Salicylate is a chemical UV filter structurally similar to octisalate. It is a photostabilizer, SPF booster, emollient and solvent. This ingredient helps evenly spread out ingredients.

According to a manufacturer, it is suitable for pairing with micro Titanium Dioxide, Zinc Oxide, and pigments.

Photostabilizers help stabilize UV-filters and prevents them from degrading quickly.

Ethylhexyl Salicylate (also called Octisalate or Octyl Salicylate) is an oil-soluble organic UV filter that's been used in sunscreen since the 1950's.

It absorbs UVB light in the 280-320 nm range with a peak absorbance around 306 nm.

You'll often see it paired with other UV filters to boost overall SPF because octisalate is a fairly week filter on its own.

The reason you'll see it so often is because it can help solubilize and stabilize the trickier filters like oxybenzone and avobenzone.

Unlike these filters, octisalate has pretty good photostability and doesn't create skin-damaging free radicals when exposed to sunlight.

The fatty-alcohol part of the molecule also gives it a light, emollient feel so it doubles as a nice texture enhancer.

Usage levels vary around the world:

Safety-wise, this ingredient has a pretty reassuring track record. The EU's Scientific Committee on Consumer Products (SCCP) found very low skin penetration in human skin tests and negative results for irritation, phototoxicity, and photoallergy.

The real-world allergy risk is pretty low too; a 2012 European study of 1,031 people recorded only 2 reactions to it (a rate of 0.19%).

You might have seen scary headlines about sunscreen getting into your blood.

In 2019, the FDA found that several chemical filters can absorb through the skin and show up in the bloodstream at small but measurable levels.

Here's the important part: these tiny levels are just a cutoff the FDA uses to decide which ingredients need more testing and doesn't mean anything harmful was found.

The researchers were clear that the results are no reason to stop wearing sunscreen.

Homosalate is an oil-soluble organic UVB filter that has been a sunscreen staple for decades. Its job is to absorb UVB rays (~295-315 nm) and protect your skin against sunburn,

This is one of the more photostable organic UV filters; it holds up pretty well under UV and a 2022 quantum-chemistry study found it stays stable in sunlight.

It's actually so reliable that formulators often pair it with shakier ingredients like oxybenzone and avobenzone. Formulators also use it to help dissolve the other UV filters into the oil phase.

One thing to keep in mind: "stable" isn't the same as "strong". On its own, homosalate is actually a pretty weak UV filter so it's better off as a helpful team player that helps boost overall SPF protection.

The safety picture is a bit nuanced but not scary.

This ingredient has a long track record of being gentle and regulators agree it isn't an irritant; EU's Scientific Committee on Consumer Safety found that homosalate is not considered a skin irritant and doesn't raise eye-irritation flags either.

There's talk about homosalate because your skin absorbs a little bit of it into your bloodstream. A 2020 FDA-backed study found homosalate showed up in people's blood levels at the level where the FDA decides to double check.

The EU's Scientific Committee on Consumer Safety (SCCS) also found small amounts in blood and breast milk. They estimated that about 5% of what you apply gets absorbed through the skin.

Due to the debate about whether it might mess with hormones, the SCCS recommended a maximum limit of 0.5% in most products of 7.3% in face creams/pump sprays.

One important thing to keep in mind: in the US, Homosalate is currently labeled "non-GRASE" by the FDA. This sounds alarming but really just means the FDA wants more data to confirm it's safe. It's not confidently saying this ingredient is harmful.

As of now, homosalate is still completely legal and widely used while that research gets done.

The current maximum limits are:

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