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Considering the fact that man has sharp teeth in front, at both sides pointed teeth, and in the rear of them molars; that his stomach is adapted to the digestion of both vegetable and animal food, and that his intestine is so constituted as to be able to digest and change into blood both kinds, we can no longer entertain any doubt that nature herself bids him to change his food constantly, and to take in such as is of the most varied kind. if, in addition to that, we recollect that exclusive animal food renders an animal wild, quick, and sly, while vegetable food makes it tame, enduring, and slow in mind, it will not be denied that food exercises great influence upon the nature of a being, and it will now be readily understood that it would be a sin, if man were to be forced to take uniform nourishment.

the example of the cat is very instructive; it teaches us that change of food has transformed her into another being, mentally as well as bodily. the wild-cat has short intestines and is an animal of prey; the tame cat has long intestines, and betrays her old character only now and then by cunning and slyness. we also learn from this, that variety of food produces variety of bodily and mental qualities; and lastly, it may be inferred that nature, having fitted man for this variety and given him such diversity of mental capacities, wishes also that his food be well selected and of the greatest variety.

popular books on natural science

for practical use in every household, for readers of all classes

author: aaron david bernstein

Considering the fact that man has sharp teeth in front, at both sides pointed teeth, and in the rear of them molars; that his stomach is adapted to the digestion of both vegetable and animal food, and that his intestine is so constituted as to be able to digest and change into blood both kinds, we can no longer entertain any doubt that nature herself bids him to change his food constantly, and to take in such as is of the most varied kind. if, in addition to that, we recollect that exclusive animal food renders an animal wild, quick, and sly, while vegetable food makes it tame, enduring, and slow in mind, it will not be denied that food exercises great influence upon the nature of a being, and it will now be readily understood that it would be a sin, if man were to be forced to take uniform nourishment. the example of the cat is very instructive; it teaches us that change of food has transformed her into another being, mentally as well as bodily. the wild-cat has short intestines and is an animal of prey; the tame cat has long intestines, and betrays her old character only now and then by cunning and slyness. we also learn from this, that variety of food produces variety of bodily and mental qualities; and lastly, it may be inferred that nature, having fitted man for this variety and given him such diversity of mental capacities, wishes also that his food be well selected and of the greatest variety. popular books on natural science for practical use in every household, for readers of all classes author: aaron david bernstein

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Keto is great but many go to extremes. While carbs are bad in the case of sapping energy and causing various kinds of inflammation, it's not that bad to have carbs once a day or so, but making them a staple of every meal will clearly be a burden. Most people don't know how to counteract insulin spikes, fix a leaky gut or contend with a hormonal imbalance. Once you get the hang of these things and a deeper understanding of the fixes for these problems, the state of popular nutritional advice becomes grossly clear - modern nutritionists are generally pretty incompetent and the ones that prove as exceptions usually aren't that highly regarded. Just like Hoppes9 mentions, you need fats. Another thing people usually miss in their diets is salt, again, namely due to the retardation that is modern nutrition, which suggests cholesterol is bad when, in reality, you cannot have too much of it.