Your brain is always "on." It takes care of your thoughts, feelings, movements, your breathing and heartbeat, your senses — it works hard 24/7, even while you’re asleep. This means your brain requires a constant supply of fuel. That "fuel" comes from the foods you eat — and what’s in that fuel makes all the difference. Put simply, what you eat directly affects the structure and function of your brain and, ultimately, your mood. Restricting or limiting your food intake is dangerous and can have severe impacts on your mental health.
(source: Harvard Health Blog)
If you or someone you know may be experiencing patterns of disordered eating, reach out to a trusted adult immediately.