Eating sardines while fasting helps you keep important nutrients, but still lets your body burn fat and lower insulin like water-only fasting does - without the risk of missing out on vitamins and minerals.

When people fast while eating sardines, their insulin levels drop dramatically, and the fat stored around their internal organs (visceral fat) is the first type of fat their body burns for energy.

Not eating sardines for 3 to 5 days can give your body health benefits that stick around for a whole month after you're done.