Is Your Sunscreen Safe for the Environment?

The science of sunscreens: ingredients, environmental impact, and reef-safe alternatives

The development and widespread usage of sunscreen products have significantly helped prevent harmful ultraviolet (UV) radiation from the sun reaching our skin, decreasing the risk of skin cancer (Armstrong & Kricker, 2001). However, recent investigations have revealed that certain chemicals found in many sunscreen products might not be as harmless to the environment, particularly coral reefs, as they are to us. This article explores the common ingredients found in sunscreens, their environmental implications, and the safer alternatives for our skin and the ecosystem.

Common ingredients in sunscreens

Sunscreen products can generally be classified into two types: chemical and physical. Chemical sunscreens contain organic compounds such as oxybenzone, avobenzone, octinoxate, and octocrylene that absorb UV rays, convert them into heat, and release them from the skin (Antoniou et al., 2008). These ingredients are known for their high sun-protection efficacy.

Physical sunscreens, on the other hand, use inorganic particles such as titanium dioxide and zinc oxide that reflect, scatter, and absorb UV radiation, acting as a physical barrier between the sun and our skin (Latha et al., 2013).

Detrimental environmental effects

Several studies have highlighted the damaging effects of some common sunscreen ingredients on marine ecosystems. Oxybenzone and octinoxate are of particular concern. Oxybenzone has been found to cause coral bleaching, hinder coral reproduction, and damage coral DNA (Downs et al., 2016). Similarly, octinoxate also contributes to coral bleaching by enhancing viral infections in symbiotic algae living within corals (Danovaro et al., 2008).

Additionally, both oxybenzone and octinoxate are considered endocrine disruptors, potentially affecting the hormonal balance in marine organisms (Kunz et al., 2006). For these reasons, some regions, like Hawaii and Palau, have already started banning sunscreens containing these ingredients.

Environmental-friendly sunscreen ingredients

Recognizing the environmental implications of some sunscreen ingredients, researchers and manufacturers have turned their attention towards developing reef-safe sunscreens. Zinc oxide and titanium dioxide are currently the preferred alternatives due to their minimal impact on coral reefs (Copp et al., 2018). However, it’s crucial to use non-nano forms of these minerals. Nano-sized particles can be ingested by marine organisms, which might lead to harmful effects (Feder, 2012).

Apart from the active UV-blocking ingredients, attention must also be paid to the other ingredients found in sunscreen products. Some of these ingredients, including parabens, triclosan, and certain types of phthalates, have been linked to various environmental issues (Giokas et al., 2007).

Future prospects and conclusion

While advancements are being made in the development of environmentally friendly sunscreens, it’s crucial to highlight the role of consumers in choosing these products. Purchasing decisions can be guided by certain labels such as “Reef Safe” or “Reef Friendly”. However, these labels are not regulated, and sometimes products labelled as such may still contain harmful ingredients (González et al., 2021). Therefore, it’s always wise to check the ingredients list before purchase.

Moreover, sunscreen isn’t the only way to protect oneself from harmful UV radiation. Wearing protective clothing, seeking shade, and avoiding peak sun hours are equally effective measures that cause no harm to our marine ecosystems (Diffey, 2009).

The ongoing research into sunscreen ingredients and their environmental impacts is a clear sign that while protecting human health is essential, it must not come at the expense of our planet’s health. The challenge now is to develop products that can provide effective sun protection without adversely affecting our environment.

REFERENCES:

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