Fad diets seem to show the most instant results, but are they actually healthy and safe?
Fad diets promote an unhealthy rate of weight loss and omit a large proportion of the food groups. Although the end result may show weight loss on the scale, this may be due to the loss of lean tissue and water, which will most likely return once you're back on a normalized eating plan.
Many of these diets complement very low-calorie plans with thermogenic supplements that can increase heart rate and place additional stress on the body. Over the long term, these types of diets may cause dehydration and nutrient deficiencies, including calcium, B-vitamins, antioxidants, and carbohydrates (glucose being the brain's sole source of fuel). The body will adapt to such deficiencies, but they put additional stress on the organs and tissues, leading to lean-tissue degradation, sluggish metabolism, pH imbalance (acidosis), and dehydration.
If you are trying lose weight, seek programs that are managed and/or created by qualified health professionals, offer balanced nutrition, target a realistic rate of weight loss, encourage physical activity, and provide an emotional support network.