Marvels of Nature Garcinia A fad diet may seem like a great way to jump-start weight loss. However, if you want to lose weight in a healthy and sustainable manner, you should shun fad diets. When you eat too much of one kind of food you will never stick with weight loss. Fad diets also run the risk of teaching you bad eating habits, rather than teaching you the proper way to eat to be healthy and lose weight. It is better to choose a way of eating that educates you to make more healthy choices.