Your thyroid may be small, but it plays a massive role in how your body functions every single day. From controlling your metabolism to influencing your energy levels, mood, and even weight, this tiny gland is constantly working behind the scenes to keep everything balanced. But what many people don’t realize is that certain everyday foods could be quietly interfering with how well your thyroid does its job.

If you’ve been feeling unusually tired, struggling with weight changes, or noticing shifts in your mood, your diet might be playing a bigger role than you think. Let’s take a closer look at six common foods that could be putting unnecessary stress on your thyroid—and what you should know about them.

First on the list are highly processed foods. These include packaged snacks, fast food, and ready-made meals that are often loaded with unhealthy fats, refined sugars, and additives. While convenient, these foods can contribute to inflammation in the body, which may affect how your thyroid functions over time. Reducing your intake of processed foods and focusing on whole, natural ingredients can make a noticeable difference.

Next are foods high in added sugar. Excess sugar doesn’t just impact your weight—it can also disrupt your hormone balance. The thyroid is closely connected to your body’s overall hormonal system, and too much sugar can create imbalances that make it harder for your thyroid to function efficiently. Cutting back on sugary drinks, desserts, and hidden sugars in everyday products is a smart move.

Soy-based products are another category worth paying attention to. While soy can be part of a balanced diet for many people, consuming it in large amounts may interfere with the absorption of iodine, a mineral that your thyroid needs to produce hormones. This doesn’t mean you need to eliminate soy completely, but moderation is key.