What chemicals should you look out for in sunblocks – and why are they harmful?

Protecting your skin from the sun is essential, but not all sunscreens are created equal. Many conventional sunblocks contain chemical UV filters that have raised concerns among health-conscious consumers, researchers, and environmental groups.

Understanding what ingredients to avoid can help you make more informed choices for yourself and your family.

Common chemical sunscreen ingredients to watch out for

Oxybenzone (Benzophenone-3)

Oxybenzone is one of the most widely used chemical UV filters. It works by absorbing UV radiation and converting it into heat.

Concerns surrounding oxybenzone include:

• Potential hormone disruption (endocrine disruption)

• Skin irritation and allergic reactions

• Absorption into the bloodstream after application

• Harm to marine ecosystems and coral reefs

Several destinations, including Hawaii, have restricted the use of sunscreens containing oxybenzone due to environmental concerns.

Octinoxate (Ethylhexyl Methoxycinnamate)

Octinoxate is commonly used to absorb UVB rays.

Potential concerns include:

• Possible disruption of hormone function

• Skin sensitivity and irritation

• Environmental toxicity, particularly to coral reefs and aquatic life

Octocrylene

Octocrylene helps stabilize other sunscreen ingredients and absorb UV rays.

Why some people avoid it:

• It may degrade over time into benzophenone, a compound linked to serious health concerns

• Can trigger allergic skin reactions

• Often detected in human tissues after repeated use

Homosalate

Homosalate is another UV filter found in many conventional sunscreens.

Research has raised concerns about:

• Potential hormone-disrupting effects

• Accumulation in the body with repeated use

• Environmental persistence

Avobenzone

Avobenzone is often used for UVA protection and is generally considered safer than some other chemical filters. However:

• It can become unstable when exposed to sunlight unless combined with stabilizing chemical ingredients

• It may cause irritation in sensitive individuals

Why are chemical sunscreens controversial?

Unlike mineral sunblocks that sit on the skin and reflect UV rays, chemical sunscreens are designed to be absorbed into the skin where they absorb UV radiation.

Studies have shown that several chemical sunscreen ingredients can be detected in the bloodstream after application. While this doesn't automatically mean they are harmful, many consumers prefer to minimise unnecessary exposure, especially for children, pregnant women, and those with sensitive skin.

Additionally, some chemical UV filters have been linked to environmental damage, particularly coral reef bleaching and toxicity to marine life.

A safer alternative: mineral sunblocks

Mineral sunblocks use ingredients such as:

• Non-nano Zinc Oxide

• Titanium Dioxide (though zinc oxide is often preferred)

Non-nano zinc oxide is considered one of the safest and most effective broad-spectrum sun protection ingredients available. It provides protection against both UVA and UVB rays by sitting on top of the skin and reflecting sunlight.

Benefits of mineral sunblocks include:

✓ Broad-spectrum protection

✓ Less likely to irritate sensitive skin

✓ Suitable for babies and children

✓ Suitable during pregnancy

✓ Reef-friendly when responsibly formulated

✓ No known hormone-disrupting effects

The bottom line

Sunscreen is important, but the ingredients matter. If you're aiming to reduce your exposure to potentially harmful chemicals while still protecting your skin from sun damage, consider choosing a mineral-based sunblock made with non-nano zinc oxide.

When shopping for sun protection, take a moment to read the ingredient list. Avoiding ingredients such as oxybenzone, octinoxate, octocrylene, and homosalate can help you make a more informed choice for both your health and the environment.

Your skin is your largest organ - what you put on it matters just as much as what you put in your body.

Written with love,

Nikki 🌿
Founder, Not Toxic

 @nottoxic.mt
🌐 www.nottoxic.mt

Disclaimer: This article is for educational purposes only and is not intended as medical advice. Always consult a healthcare professional for personalised recommendations regarding sun protection and skin health.