Are there toxic chemicals in your grocery store receipt?
For most people, handling receipts is a low-risk activity, but if you’re concerned, there are some straightforward precautions you can take.
When you walk out of the grocery store with a receipt in hand, you might wonder if there are any harmful chemicals on it. The paper receipts are printed using thermal paper, which often contains bisphenol chemicals. Bisphenols are man-made substances that have been widely used in manufacturing since the 1950s. There are several types of bisphenols, each with a letter indicating the chemical they are made from, such as bisphenol A (BPA), bisphenol S (BPS), and bisphenol F (BPF).
Thermal receipt paper uses bisphenol as a developer, typically BPA or BPS, which is combined with a colorless ink and applied as a microscopic, heat-sensitive film to the paper. When the thermal paper is exposed to heat during printing, the bisphenol reacts with the dye, turning it from colorless to black.
These chemicals are classified as endocrine disruptors, meaning they interfere with the body's endocrine system, which controls vital functions like growth, reproduction, and metabolism. Endocrine system organs, including the thyroid, pancreas, and pituitary gland, send messages throughout the body to regulate various functions.
Some research has focused on BPA, showing that it can disrupt hormone messaging, particularly estrogen, which is crucial for fetal development and can lead to preterm birth and abnormal brain development. Exposure to BPA has been linked to various health problems, such as heart disease, diabetes, obesity, and oxidative stress.
While Europe has banned BPA in baby bottles, its use remains in many other products, and many manufacturers have replaced BPA with alternative bisphenols like BPS. These alternative chemicals may share similar toxic traits. Additionally, bisphenols can be absorbed through the skin, increasing absorption when handling receipts printed on thermal paper, especially if your hands are greasy from moisturizer or hand sanitizer.
The dose of exposure matters, as demonstrated by the classic example of cyanide. A lethal dose of cyanide weighs less than 10 grains of rice, but our bodies naturally produce small amounts of this poison. Similarly, while the human body requires a significant amount of water daily, excessive water intake can be fatal. The focus should be on reducing exposure to these chemicals rather than avoiding them entirely.
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