No The digestion and absorption ability of the elderly is declining. In order to ensure the intake of nutrients, the elderly should add 1 or 2 meals on the basis of three meals a day, that is, "3+ 1" or "3+2" mode, so eating one meal a day is not acceptable. First of all, the distribution of three meals should be reasonable, and each meal should not be too simple, otherwise it will be difficult to meet the diversified requirements.