 Diets have an effect on the "energy in" component of the energy balance by limiting or varying the distribution of foods. Techniques that influence on the appetite can confine energy intake by affecting the desire to overdose.
Consumption of low-energy, fiber-rich foods, such as non-starchy vegetables, is effective in gaining satiation (the feeling of "fullness"). Exercise is also helpful in controlling appetite. (Extreme physical exhaustion, such as experienced by soldiers and mountain climbers, can make eating a difficult job.)
Making use of drugs to control appetite is extremely dangerous. Stimulants are often taken as a means to neglect normal, healthy hunger by people who are not really obese. Even those who are obese to the point that it will crash their long-term health are unlikely to put on weight from total fasting or fundamental changes.
Emotional or habitual eating is a general problem. Sufferers often resort to self-help books, hypnosis and group therapy. Despite the fact that these sources can sometimes be of help, dieters must be careful. Some "diet gurus" are swindlers, while the others are well-meaning but focus on psychology or philosophy at the expense of practical solutions. Diets considered to fascinate people emotionally are often either very difficult to follow (too strict) or useless (too relaxed).
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