[0xbear]

Fung's theory prescribes exactly what you did. Eat unprocessed foods, don't eat too much, don't snack all the time, skip breakfast, fast 24-36 hours every now and then. Whether or not you get fat is largely determined by insulin levels and homeostasis. Insulin level is elevated in obese people due to insulin resistance. Fasting and not snacking (and skipping breakfast) help reset insulin "thermostat" to within normal range and maintain it through relatively minor lifestyle adjustments.