Purefit Keto The changes that you want to make should be introduced to your body gradually. One extra bite of food a day can make you gain several pounds a year. Cut it out and you're losing those extra pounds, too. That is the basic principle of dieting. Anything extra should be eliminated completely. Your attitude towards weight loss should not be temporary. Keep your changed eating habits for the rest of your life. When you have achieved your desired weight, persevere to sustain it eternally. This will let you enjoy a healthy life even during old age.