https://health-insider.co.uk/ Why Is It Important To Eat Healthy? A poor diet could lead to your body, not replenishing its energy levels. You are tired and fatigued A poor diet may weaken your immune system, so you're at a higher risk to develop illness. Your oral health can be affected by your diet, which you might not be aware of. If you eat unhealthy food items such as candy and processed fats, or acidic beverages, you're more at risk of developing chance of developing gum disease and tooth decay.