From Ocean to Bloodstream: The 50-Year Journey of a Mascara Tube

In 1998, somewhere in suburban New Jersey, someone finished a tube of mascara and threw it in the trash. This is roughly where that tube is now.

Year 1: Landfill

The tube — a hollow black PP cylinder with a wand of nylon bristles — was hauled by truck to a landfill outside Trenton. It was buried under a meter of compacted municipal solid waste. Cool, dark, anaerobic. Nothing degraded it.

Years 2–8: First exposure

A new cell of the landfill opened on top. Rainwater seeped through, picking up trace metals and additives. The tube cracked into three large pieces from compaction. Surface area: tripled.

Year 12: Wind, then water

The landfill closed and was capped with clay. A storm in 2010 eroded the cap. Some surface debris — including our tube fragments — washed into a tributary of the Delaware River.

Years 13–20: Downstream

The fragments traveled. They snagged in mangroves, broke loose, snagged again. UV light from sunlight broke long polymer chains into shorter ones. The pieces became brittle and shed flakes. Each flake was a microplastic now.

By 2018, fragments had reached the Atlantic. Currents carried them into the North Atlantic Gyre — a slow-rotating accumulation zone the size of Texas.

Year 23: Plankton

In 2021, a juvenile copepod ate a flake mistaking it for an algae cell. The copepod was eaten by an anchovy. The anchovy was eaten by a mackerel. The mackerel was caught off the coast of Spain, processed, and sold in a can in a London supermarket.

Year 25: Bloodstream

In 2023, a person ate that mackerel for lunch. Lab tests on similar canned fish that year showed an average of 112 microplastic particles per 100g of flesh. Most passed through. Some — the smallest, sub-1-micron — crossed the intestinal wall into the bloodstream.

A 2024 Italian study found microplastics in the carotid arteries of 58% of patients undergoing surgery. Those patients had 4.5x the rate of heart attack and stroke within three years.

Year 50 and beyond

The remaining fragments of our original tube — now millions of separate particles — are still circulating. PP doesn't biodegrade. It just keeps breaking into smaller pieces, indefinitely. The original ~30 grams of plastic has spread across thousands of kilometers, dozens of organisms, and is permanently embedded in marine and human tissue.

The point

This isn't a hypothetical. The timeline above describes mascara tubes manufactured in the late 1990s and is conservative — many are still intact today. Every tube of long-wear mascara, every plastic press-on nail set, every pump dispenser bought this year is starting the same journey.

The only way out of this loop is to stop adding to it. Materials that *can* break down — plant-based PLA, paper, glass, aluminum — finish their journey in months or years, not centuries. Pick those, and the journey ends.