Why are sugary and fatty foods so hard to resist? Studies suggest that even a few days of eating high-calorie foods can alter brain activity, reduce insulin sensitivity and strengthen cravings for sweet and fatty snacks. Experts explain how changing eating habits can help break the cycle. We also look at the important differences between food allergies, intolerances and celiac disease, and why getting the right diagnosis matters. And what about magnesium for muscle cramps? Despite its popularity on social media, current evidence suggests other factors, including exercise intensity, muscle fatigue and heat, often play a much bigger role.