It is possible to eat immoderately, even of wholesome food. It does not follow that because one has discarded the use of hurtful articles of diet he can eat just as much as he pleases. Overeating, no matter what the quality of the food, clogs the living machine and thus hinders it in its work.
(CH 119.1)
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VC
Many make a mistake in drinking cold water with their meals. Food should not be washed down. Taken with meals, water diminishes the flow of the saliva; and the colder the water, the greater the injury to the stomach. Ice water or ice lemonade, taken with meals, will arrest digestion until the system has imparted sufficient warmth to the stomach to enable it to take up its work again. Masticate slowly, and allow the saliva to mingle with the food.
(CH 119.2)
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The more liquid there is taken into the stomach with the meals, the more difficult it is for the food to digest, for the liquid must first be absorbed. Do not eat largely of salt; give up spiced pickles; keep fiery food out of the stomach; eat fruit with the meals, and the irritation that calls for so much drink will cease to exist. But if anything is needed to quench the thirst, pure water is all that nature requires. Never take tea, coffee, beer, wine, or any spirituous liquor.
(CH 120.1)
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VC
In order to secure healthy digestion, food should be eaten slowly. Those who wish to avoid dyspepsia, and those who realize their obligation to keep all their powers in a condition which will enable them to render the best service to God, will do well to remember this. If your time to eat is limited, do not bolt your food, but eat less, and masticate slowly. The benefit derived from food does not depend so much on the quantity eaten, as on its thorough digestion; nor the gratification of taste so much on the amount of food swallowed, as on the length of time it remains in the mouth. Those who are excited, anxious, or in a hurry would do well not to eat until they have found rest or relief, for the vital powers, already severely taxed, cannot supply the necessary digestive fluids. When traveling, some are almost constantly nibbling, if there is anything in their reach. This is a most pernicious practice. If travelers would eat regularly of the simplest and most nutritious kinds of food, they would not experience so great weariness, nor suffer so much from sickness.
(CH 120.2)
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In order to preserve health, temperance in all things is necessary—temperance in labor, temperance in eating and drinking. Our heavenly Father sent the light of health reform to guard against the evils resulting from a debased appetite, that those who love purity and holiness may know how to use with discretion the good things He has provided for them, and that by exercising temperance in daily life, they may be sanctified through the truth.
(CH 120.3)
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VC