Most of us think about what we put on our skin. Fewer of us think about where it goes after it washes off. The answer, more often than not, is the ocean.

Personal care products are one of the least discussed sources of microplastic pollution in our waterways. Exfoliating scrubs, face washes, shaving creams, and even everyday moisturizers can contain tiny plastic particles, many too small to see with the naked eye, that flow directly from your drain into rivers, coastal waters, and eventually open ocean.

What are microplastics, exactly?

Microplastics are plastic fragments smaller than 5 millimeters. In personal care products, they show up in two ways: as intentionally added plastic beads used to create that gritty, exfoliating texture in scrubs, and as particles shed from synthetic ingredients and plastic packaging over time.

Research published in 2024 found that a single face scrub can release as much as 36 grams of microplastic particles per product. These particles are too small for most wastewater treatment systems to catch, which means they pass through largely unfiltered and enter our waterways.

What happens when they reach the ocean?

Once microplastics enter the marine environment, they do not disappear. They accumulate. A 2025 meta-analysis found that microplastic concentrations in coastal sediments and open waters have already reached levels shown in laboratory studies to disrupt the biological functions of marine life, including their ability to feed, grow, reproduce, and survive.

Phytoplankton, the foundation of the ocean food chain and one of Earth's primary oxygen producers, are among those affected. When phytoplankton populations are disrupted, the effects ripple through every level of the marine ecosystem, from small fish to the largest whales.

And the cycle does not end at the shore. As microplastics accumulate in marine organisms, they re-enter the human food chain through the seafood we eat. The ocean and the dinner table are more connected than most people realize.

Why does this matter for your daily routine?

The average person uses several personal care products each day. Multiply that by millions of consumers, and the daily drain runoff becomes a significant and largely invisible pollution stream. Unlike plastic bottles on a beach, this kind of pollution is diffuse and hard to see, which is part of why it has taken so long to study and regulate.

The good news is that this is one of the most direct areas where consumer choice creates immediate impact. Every product swap toward formulas built on fewer, cleaner, naturally occurring ingredients is one less source of synthetic particles entering the water.

What can you do?

Read ingredient labels. The connection between what you choose at the shelf and what ends up in the ocean is more direct than most brands will tell you.

The reef does not care about marketing claims. It responds to what actually enters the water. Choosing products with simple, traceable ingredients is one of the most direct ways a daily habit becomes an act of environmental stewardship.