Plastic in Your Coffee

Every morning, millions of people start their day with a cup of coffee.

For many, this ritual isn't complete without a disposable cup from their favorite café. But what if this daily habit is quietly undermining your health, especially your testosterone levels?

And this matters for women too, not just men...

Disposable cups are a convenient choice with hidden costs to the body, and visible ones among the bushes, on the streets and on the beaches. You see them floating in puddles and tossed along the roadsides.

What we do to Mother Earth, we get back.

The modern world rewards convenience, and disposable coffee cups have become a symbol of city life. These cups, usually made of or coated with polystyrene, offer a quick, easy way to enjoy drinks on the go. However, recent research has revealed a darker side to this convenience: the release of polystyrene microplastics (PS-MPs) into the drinks they hold, especially when exposed to heat.

And the coffee in your cup is hot, very hot...

A 2022 study published in Particle and Fiber Toxicology examined the effects of chronic exposure to PS-MPs on male reproductive health. The results were alarming: significant declines were observed in testosterone levels, sperm quality and overall reproductive health.

So how do these microplastics affect testosterone levels?

They disrupt the hypothalamic-pituitary-testicular (HPG) axis, a critical hormonal pathway that regulates testosterone production. And since microplastics synthetically regulate the luteinizing hormone receptor (LHR), this matters for women too.

A separate study published in Science of the Total Environment in 2024 found that disposable cups can release between 838 and 5984 microplastic particles per liter when filled with hot liquids. These particles are then swallowed along with the drink, leading to the same reproductive problems.

The implications of these findings are significant, especially for men who regularly drink hot beverages from disposable cups. Regular exposure to even small amounts of PS-MPs accumulates over time and leads to declines in testosterone levels and reproductive capacity.

Testosterone is essential for maintaining energy levels, sex drive, muscle mass and fertility. A decline in this hormone creates a range of health problems, such as fatigue, reduced sexual function and even depression.

What do you think? Given these risks, maybe the convenience of disposable coffee cups isn't worth the hidden costs to your health?

Next time you reach for that hot cup of coffee, consider the hidden dangers. Take a moment to make a choice that will benefit your health for a lifetime.

Links to the studies:

Haibo Jin et al., "Chronic Exposure to Polystyrene Microplastics Induced Male Reproductive Toxicity and Decreased Testosterone Levels via the LH-Mediated LHR/cAMP/PKA/StAR Pathway," Particle and Fibre Toxicology 19 (2022): 13, doi:10.1186/s12989-022-00453-2.

M. S. Tawfik and A. Huyghebaert, "Polystyrene Cups and Containers: Styrene Migration," Food Additives & Contaminants 15, no. 5 (1998): 592-99, doi:10.1080/02652039809374686.

Huier Chen et al., "Release of Microplastics from Disposable Cups in Daily Use," Science of the Total Environment 854 (2023): 158606, doi:10.1016/j.scitotenv.2022.158606.

Jiayuan Qu et al., "Polystyrene Microplastics Trigger Testosterone Decline via GPX1," Science of the Total Environment 947 (2024): 174536, doi:10.1016/j.scitotenv.2024.174536.