Weight fluctuation happens daily, week to week, or month to month. Learn about causes and when to see a healthcare provider about weight changes.

Among the trillions of microbes that live in the gut, one obscure bacterium has suddenly become a star of obesity research.

Eating fast food daily can lead to a poor-quality diet, high sugar and fat intake, and nutrient deficiencies, which can trigger ongoing inflammation and oxidative stress processes linked to systemic ...

Past research has found that exposure to bright lights and high levels of noise can alter both physiological processes and ...

Some research links smoking to weight changes. However, it may not cause weight gain directly. Quitting smoking has shown links to minimal weight gain, for various reasons. Smoking is the most common ...

Potential side effects caused by the popular exercise supplement creatine include weight gain, nausea, diarrhea, muscle ...