Mineral vs. Chemical Sunscreens – What You Need to Know

The Chemicals in Your Sunscreen Aren’t Good for Your Health or the Planet – Here’s What to Look For Instead

Not all sunscreens are created equal. Some contain chemical ingredients that may disrupt hormones, irritate sensitive skin, and harm marine ecosystems. Others use mineral-based filters that are safer for human health and less damaging to the environment.

Understanding what’s in your sunscreen is essential if you want effective UV protection without compromising your well-being or the planet. This article breaks down exactly what to look for in a sunscreen that supports your health and protects the environment.

Chemical vs. Mineral Sunscreens – Understanding The Difference

There are two main types of sunscreens:

1. Chemical Sunscreens

These absorb UV rays and convert them into heat. Common ingredients:

• Homosalate
• Octocrylene
• Octisalate
• Oxybenzone
• Avobenzone

Some of these chemicals can absorb into your bloodstream and act as hormone disruptors. And, many of these chemicals are toxic to coral reefs and marine life, causing bleaching and DNA damage.

2. Mineral Sunscreens

These sit on top of your skin and physically block UV rays.
Main ingredients:

• Zinc oxide
• Titanium dioxide

It’s best for: Sensitive skin, kids, and reef-safe choices.
Tip: Choose non-nano zinc oxide – it’s less likely to harm marine life.

Ingredients to Avoid for Health and Environmental Safety

If the label has any of the following, consider putting it back:

• Homosalate – May disrupt estrogen and androgen balance.
• Octocrylene – Linked to cell damage and marine toxicity.
• Oxybenzone – Known coral toxin and potential endocrine disruptor.
• Avobenzone – Often unstable and needs stabilizers like octocrylene.
• Parabens and Fragrance – Can irritate skin and pollute waterways.

*Watch out for terms like “broad spectrum” that don’t list ingredients clearly.

What to Look for When Shopping for Sunscreen

Choose sunscreens that are:

• Mineral-based: Look for non-nano zinc oxide or titanium dioxide.
• Fragrance-free: Less likely to irritate or contain hidden chemicals.
• Reef-safe labeled: But double-check the ingredients – the label isn’t always regulated.
• Certified organic or EWG verified: Extra peace of mind.
• Water-resistant: So you use less and it stays on longer.

Long story short: Chemical filters like homosalate and octocrylene can penetrate the skin, enter the bloodstream, and disrupt hormone function over time. For people with sensitive skin, conditions like eczema or rosacea, these ingredients can also trigger irritation and inflammation.

From an environmental perspective, the impact is just as significant. Studies have shown that common chemical sunscreens contribute to coral reef bleaching, damage marine wildlife, and persist in ocean ecosystems long after they’re washed off our skin. Even small amounts can be toxic to marine life. The cumulative effect of millions of people using harmful sunscreens is a growing concern for coastal ecosystems worldwide.

By switching to a mineral-based, reef-safe sunscreen – especially one with non-nano zinc oxide – you reduce your exposure to potentially harmful chemicals and help protect marine biodiversity. It’s a simple yet powerful step toward more conscious living.