Completely false. Optimum weight loss is achieved if your body doesn't think it is starving and has to maintain fat reserves for survival. Intermittent fasting is a good method for weight loss if you understand it and maintain minimums. A 10-20% calorie deficit is considered to be a good target for weight loss. A starvation diet can't be maintained forever and all losses will be reversed when a normal diet is resumed. Yo-yo dieting accomplishes nothing.