Miami Mangos: Is Sunscreen Ruining Your Fruit?

By Franklin Everett Shaw

July 31, 2025

Imagine biting into a juicy, sun-ripened Miami mango, only to wonder if the very sunscreen protecting you at South Beach might have tainted its flavor and, more importantly, its safety. It’s a bizarre thought, but in a city where sun protection is practically a religion and tropical fruit thrives, the potential for interaction is real. Let’s dive into the sticky science of sunscreen, mangoes, and the Magic City.

Miami’s vibrant culture and sun-drenched beaches draw millions, all slathering on sunscreen to ward off harmful UV rays. But what happens to those chemicals after a dip in the ocean or a day of sweating in the Florida heat? They wash off, and some inevitably end up in the soil and water.

Now, consider Miami’s mango groves, both commercial and residential. These trees are often irrigated, drawing water from various sources, including potentially contaminated groundwater. Could sunscreen chemicals be absorbed by the trees and end up in the fruit? It’s a question worth exploring.

The primary concern revolves around the active ingredients in sunscreen, particularly chemicals like oxybenzone, octinoxate, octisalate, and octocrylene. These are UV filters designed to absorb or reflect sunlight. Studies have shown that these chemicals can disrupt hormone function in aquatic life and may have other adverse health effects.

While research on the direct impact of sunscreen chemicals on fruit crops is limited, we can extrapolate from existing studies on plant uptake of other pollutants. Plants can absorb chemicals from the soil and water through their roots and leaves. The extent of absorption depends on several factors, including the chemical’s properties, the plant species, and the soil composition.

For example, a study on the uptake of pharmaceuticals by lettuce showed that certain compounds could be absorbed and accumulated in the leaves. While mangoes are obviously different from lettuce, the principle remains the same: plants can and do absorb chemicals from their environment.

The challenge lies in determining the concentration of sunscreen chemicals in Miami’s water and soil, and then assessing the mango tree’s ability to absorb and accumulate these chemicals in its fruit. This requires rigorous testing and analysis.

Let’s consider a hypothetical scenario: A homeowner in Coconut Grove diligently applies sunscreen before tending to their mango tree. Rain washes the sunscreen off their skin and into the soil around the tree. The tree’s roots absorb the contaminated water, and over time, the sunscreen chemicals accumulate in the mangoes.

While this is a simplified example, it highlights the potential for exposure. The concentration of sunscreen chemicals in the mangoes would likely be low, but the long-term effects of repeated exposure are unknown.

One common mistake developers make is assuming that chemicals will simply break down and disappear in the environment. While some degradation does occur, many sunscreen chemicals are persistent and can persist in the environment for extended periods.

Another pitfall is neglecting the cumulative effect of multiple sources of contamination. Sunscreen isn’t the only source of pollution in Miami’s waterways. Other sources, such as agricultural runoff and industrial discharge, can also contribute to the overall chemical burden.

So, what can Miami residents and tourists do to minimize the risk of sunscreen contamination in mangoes? Here are some practical tips:

• Choose mineral sunscreens: Opt for sunscreens containing zinc oxide or titanium dioxide as the active ingredients. These minerals are considered safer for the environment and human health. Look for “reef-safe” or “reef-friendly” labels, but be aware that these terms are not always strictly regulated.
• Apply sunscreen responsibly: Apply sunscreen indoors or away from gardens and waterways. Allow the sunscreen to dry completely before going outside.
• Wash mangoes thoroughly: Wash mangoes thoroughly with soap and water before eating them. This can help remove any surface contaminants. A simple solution of water and baking soda can also be effective.
• Support local farmers: Buy mangoes from local farmers who use sustainable farming practices. Ask them about their irrigation methods and pesticide use.
• Advocate for stricter regulations: Support policies that regulate the use of harmful chemicals in sunscreens and other products.

Here’s a step-by-step guide to washing mangoes effectively:

1. Rinse the mango under running water to remove any loose dirt or debris.
2. Fill a clean bowl or sink with cool water and add a few drops of dish soap.
3. Gently scrub the mango with a soft brush or sponge. Pay attention to the stem end, where dirt and contaminants can accumulate.
4. Rinse the mango thoroughly under running water to remove all traces of soap.
5. Dry the mango with a clean towel.

For an extra layer of protection, consider using a fruit and vegetable wash. These washes are specifically designed to remove pesticides and other contaminants from produce.

The challenge of sunscreen contamination in mangoes is a complex one, requiring a multi-faceted approach. It’s not just about individual choices; it’s also about collective action and responsible environmental stewardship.

Miami, with its unique blend of urban life and tropical agriculture, serves as a microcosm for the broader challenges of balancing human activity with environmental protection. By raising awareness and promoting responsible practices, we can help ensure that Miami’s mangoes remain a safe and delicious treat for generations to come.

Ultimately, the question of whether sunscreen chemicals are contaminating Miami’s mangoes requires further investigation. However, the potential for exposure is real, and it’s important to take steps to minimize the risk. By choosing safer sunscreens, washing mangoes thoroughly, and supporting sustainable farming practices, we can help protect our health and the environment.