low carb

One keto dieter, Shelley Kearney, told Insider.com she struggled with "getting over the sluggish, flu-like symptoms was the hardest and I suffered with headaches a lot."

In an effort to battle the bulge, many will do whatever it takes to lose weight. But there's a difference between weight loss and overall body health.

Research shows that signs of not getting enough carbs can lead to lethargy, brain fog, and significant dips in mood.