New Delhi: On World Thyroid Day 2026, being celebrated on May 25, it is pertinent to turn our attention towards lifestyle habits that may quietly affect
thyroid health. Packaged foods, from instant noodles and flavoured snacks to fizzy drinks and ready-to-eat meals, have become a daily convenience for millions because they are affordable, quick and easy to store. However, experts are increasingly examining whether artificial flavours, colours, preservatives and additives used in processed foods could interfere with thyroid function.
The thyroid, a small gland located in the neck, regulates metabolism, energy levels, growth and body temperature, meaning even slight hormonal changes can affect the body significantly. Researchers are now studying whether chemicals commonly found in ultra-processed foods may disrupt hormonal balance over time. Although scientists say there is no direct evidence proving additives alone cause thyroid disease, several studies have raised concerns about their possible connection with thyroid-related health risks among regular consumers globally. Here is the detail.
Thyroid health and processed foods
The thyroid gland plays an important role in controlling metabolism, growth, energy production and body temperature. Small disruptions in thyroid hormone levels can influence multiple body functions and overall health.
Experts are studying several food-related chemicals that may act as endocrine disruptors. These include bisphenol A (BPA), phthalates, parabens, artificial sweeteners, tartrazine, erythrosine and other synthetic food colours commonly found in processed products.
How endocrine disruptors may affect hormones
Endocrine disruptors are substances that may interfere with the body’s hormonal system. Researchers believe these chemicals could affect hormone production, release or activity, potentially influencing thyroid function over time.
What the study found
According to a 2022 study titled – Ultra-processed food consumption and the risk of subclinical thyroid dysfunction: A prospective cohort study, people who consumed higher amounts of ultra-processed foods had a greater risk of developing subclinical hyperthyroidism. Researchers said the findings highlight the need for more investigation into dietary patterns and thyroid health.
Additives linked to iodine disruption
Studies have also examined nitrates, nitrites and perchlorate, which may interfere with iodine uptake by the thyroid gland. These substances are sometimes present in processed meats, preservatives and food packaging materials.
Key points from animal studies
Some animal-based research has shown that certain additives may alter thyroid tissue or hormone markers. However, scientists caution that results observed in animals do not always apply directly to humans.
Researchers say there is currently no strong evidence proving that artificial additives alone cause thyroid disease. However, experts recommend limiting highly processed foods, checking ingredient labels and maintaining adequate iodine intake as precautionary measures.
While more human research is needed, experts believe reducing dependence on highly processed foods may support better thyroid health over time.
