A reader concerned about heart health poses questions after being told to use xylitol-sweetened gum for dry mouth. Medical professionals respond to clarify whether the sweetener has any detrimental impact on the cardiovascular system.

One reader’s fears about thyroid cancer and a family history prompt questions about Hashimoto’s disease. A social media site recommends eliminating gluten, dairy, tofu, and tomatoes—raising deeper inquiries about effective dietary changes and the realities of risk.