Houston Heat: Sunscreen Lies Burning Baby Biomes?

By Franklin Everett Shaw

January 21, 2026

The Texas sun beats down relentlessly, especially here in Houston. We slather on sunscreen, thinking we’re doing our skin a favor. But what if that very sunscreen is harming the delicate ecosystem of Galveston Bay, the playground for our kids and a vital habitat for countless species? It’s time for a serious conversation about reef-safe sunscreen, and how to navigate the murky waters of greenwashing to protect both ourselves and our precious bay.

The problem isn’t just about faraway coral reefs. Galveston Bay is our backyard, and it’s suffering. Chemicals in many common sunscreens, like oxybenzone and octinoxate, are toxic to marine life. They disrupt coral’s reproduction and growth, and they can even harm fish and other aquatic organisms. When we swim, shower, or even just sweat, these chemicals wash into the water, contributing to the bay’s degradation.

So, what can a conscientious Houstonian do? The first step is understanding what to avoid. Oxybenzone and octinoxate are the biggest offenders. These chemicals are UV filters that absorb sunlight, but they’re also endocrine disruptors and can cause coral bleaching. Other ingredients to watch out for include:

Octocrylene
Homosalate
Avobenzone (while less harmful than oxybenzone, it can still contribute to environmental problems)
Parabens (propylparaben, butylparaben, etc.)
Phthalates
Microplastics (often listed as polyethylene or polypropylene)

Now, here’s where it gets tricky: greenwashing. Many brands slap a “reef-friendly” or “eco-friendly” label on their products, even if they contain some of these harmful ingredients. Don’t be fooled by vague claims or pretty packaging. Read the ingredient list carefully. If you see any of the chemicals listed above, steer clear.

A common tactic is to label a sunscreen “reef-friendly” because it’s free of oxybenzone and octinoxate, while still containing other harmful chemicals. This is technically true, but misleading. It’s like saying a burger is healthy because it doesn’t have trans fats, while ignoring the saturated fat and sodium content.

So, how do you find truly reef-safe sunscreen in Houston? Look for mineral-based sunscreens that use zinc oxide or titanium dioxide as the active ingredients. These minerals create a physical barrier that reflects sunlight, rather than absorbing it. They are generally considered safer for marine life and for human health.

But even mineral sunscreens aren’t created equal. Some contain nanoparticles, which are tiny particles that can potentially penetrate the skin and may have unknown environmental effects. Look for non-nano zinc oxide or titanium dioxide. This means the particles are larger and less likely to be absorbed.

Where can you find these elusive, truly reef-safe sunscreens in Houston? Here are a few local options:

Whole Foods Market: They typically carry a selection of mineral-based sunscreens, including brands like Badger Balm and Thinkbaby/Thinksport. Check the ingredient lists carefully to ensure they are non-nano and free of other harmful chemicals. The Whole Foods on Waugh Drive is a good place to start.
Central Market: Similar to Whole Foods, Central Market offers a variety of natural and organic products, including mineral sunscreens. Look for brands like Raw Elements and Goddess Garden. The Central Market on Westheimer is a popular choice.
Local Health Food Stores: Smaller health food stores in neighborhoods like The Heights and Montrose often carry niche brands that prioritize sustainability and reef safety. Ask the staff for recommendations.
Online Retailers: Websites like Amazon and Thrive Market offer a wider selection of reef-safe sunscreens. However, be extra vigilant about reading ingredient lists and checking reviews to avoid greenwashing.

Don’t just take the store’s word for it. Double-check the Environmental Working Group’s (EWG) Skin Deep database. This website rates sunscreens based on their safety and environmental impact. It’s a valuable resource for making informed choices.

Now, for the truly dedicated: let’s talk DIY sunscreen. Making your own sunscreen allows you to control exactly what goes on your skin and into the environment. Here’s a basic recipe for a mineral-based sunscreen suitable for Houston’s climate:

Ingredients:

1/4 cup non-nano zinc oxide powder
1/4 cup shea butter (for moisturizing)
1/4 cup coconut oil (for moisturizing and water resistance)
2 tablespoons beeswax (for thickening and water resistance)
Optional: a few drops of essential oil for scent (lavender, chamomile, or carrot seed oil are good choices)

Instructions:

Melt the shea butter, coconut oil, and beeswax in a double boiler or a heat-safe bowl set over a pot of simmering water.
Once melted, remove from heat and let cool slightly.
Slowly whisk in the zinc oxide powder, making sure to break up any clumps.
Add essential oils, if desired.
Pour into a jar or container and let cool completely.

Important Considerations:

SPF Testing: This recipe provides an estimated SPF of around 20-30, but it’s difficult to know the exact SPF without professional testing. Reapply frequently, especially after swimming or sweating.
Zinc Oxide Quality: Use high-quality, non-nano zinc oxide powder from a reputable source.
Water Resistance: This recipe is somewhat water-resistant, but it’s not waterproof. Reapply after swimming or sweating heavily.
Storage: Store your homemade sunscreen in a cool, dark place. It should last for several months.

Making your own sunscreen can be a fun and rewarding way to protect your skin and the environment. However, it’s important to do your research and follow the instructions carefully.

One common mistake people make when switching to mineral sunscreen is not applying enough. Mineral sunscreens work by creating a physical barrier, so you need to apply a generous layer to ensure adequate coverage. Don’t skimp!

Another challenge is the “white cast” that some mineral sunscreens can leave on the skin. This is especially noticeable on darker skin tones. To minimize the white cast, try these tips:

Choose a tinted mineral sunscreen.
Apply the sunscreen in thin layers, rubbing it in thoroughly.
Mix the sunscreen with a small amount of moisturizer or oil.

Protecting Galveston Bay is a collective effort. By choosing reef-safe sunscreen, we can all make a difference. It’s not just about protecting coral reefs in faraway places; it’s about preserving the health and beauty of our own backyard for generations to come. So, next time you’re heading to the beach or the pool, remember to choose wisely and protect our bay.