The Evidence
Plastic production exploded.
Then cancer in young people
started climbing.
1,600,000Microplastic particles
released per day
Polypropylene baby bottles release ~1.6 million microplastic particles per day into infant formula during standard preparation at 70°C — the temperature pediatricians recommend for safe formula. By six months, an estimated 45% of US babies are fed from these exact bottles. Their daily oral microplastic intake exceeds the average adult's by roughly 2,600 times.
Li et al. 2020, Nature Food · WHO microplastic intake estimate · CDC 2022 · Grand View Research 2024
~1960Birth year where cancer risk
reversed from declining to rising
Cancer rates in young people had been declining for decades. Then, for cohorts born after ~1960 — the first generation raised on plastic — the trend reversed. Adults born in 1990 face 2.4× higher colon cancer risk, 4.3× higher rectal cancer risk, and 2.9× higher kidney cancer risk than those born in 1950. The cohort raised entirely on polypropylene bottles is now 10–20 years old. Their cancers will not manifest until 2030–2050.
Siegel et al. 2017, JNCI · Sung et al. 2024, Lancet Public Health
100%Of placentas tested
contained microplastics
Microplastics have been detected in colon tumors at higher concentrations than in adjacent healthy tissue. In livers with disease — but not healthy livers. In kidney tissue. In 100% of placentas tested, with detectable particles before birth. We are now finding them inside the cells, organs, and biological barriers we believed were sealed against the outside world.
Cetin 2023 · Horvatits 2022, eBioMedicine · Garcia/Campen 2024, Toxicological Sciences
Before 10Age at which cancer-driving
DNA mutations begin
In 2025, researchers identified that a common gut bacterium (pks+ E. coli) causes DNA driver mutations before age 10 — mutations that are 3.3× more common in colorectal cancer patients diagnosed before 40 than in those over 70. These bacteria thrive in a dysregulated gut: reduced microbial diversity, impaired intestinal barrier, chronic inflammation. Multiple studies confirm microplastics produce exactly these conditions. This is the mechanism. The connection is no longer theoretical.
Alexandrov et al. 2025, Nature — 981 genomes, 11 countries
Disclosure: No proven causal link between microplastic exposure and cancer has been established in human longitudinal studies. We do not wait for longitudinal evidence to act. We didn't with lead paint. We didn't with asbestos. We didn't with tobacco. The precautionary principle exists for precisely this situation.