No-carbohydrate diet

bantingdiet, wiightloss

A

no-carbohydrate diet

(

no-carb diet

,

zero carb diet

) excludes dietary consumption of all

carbohydrates

(including

dietary fiber

) and suggests

fat

as the main source of energy with sufficient

protein

. A no-carbohydrate diet may be

ketogenic

, which means it causes the body to go into a state of

ketosis

, converting dietary fat and

body fat

into

ketone bodies

which are used to fuel parts of the body that do not

oxidize fat

for energy, especially the

brain

. Some bodily organs and parts of the brain still require

glucose

, which is tightly regulated by the liver and adequately supplied by

gluconeogenesis

or by converting

glycerol

from the breakdown of

triglycerides

. A no-carbohydrate diet may use mainly

animal source foods

and may include a high

saturated fat

intake, though this is not prescriptive of the diet, which, by definition, only restricts carbohydrate intake.

History

[


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]

An early proponent of an all animal-based diet was

Icelandic



Canadian


explorer


Vilhjalmur Stefansson

(1879–1962), who lived with the

Inuit

for some time and witnessed their

diet

as essentially consisting of

meat

and

fish

, with very few

carbohydrates

—just

berries

during the summer. However, the accuracy of his analysis has been since called into question, as the

Inuit diet

has not been shown to be a ketogenic diet and roughly 15-20% of its calories are from carbohydrates, largely from the

glycogen

found in the

raw meats

.


[1]


[2]


[3]

Stefansson and a friend later volunteered for a one-year experiment at

Bellevue Hospital Center

in

New York City

to prove he could thrive on a diet of nothing but meat, meat fat, and internal organs of animals.


[4]

His progress was closely monitored and experiments were done on his health throughout the year. At the end of the year, he did not show any symptoms of ill health; he did not develop

scurvy

, which many scientists had expected to manifest itself only a few months into the diet due to the lack of

vitamin C

in muscle meat. However, Stefansson and his partner did not eat just muscle meat but also fat, raw brain,


[5]

raw liver (a significant source of vitamin C and others), and other varieties of

offal

.


[6]

There is some question as to amount – if any – of raw brain, raw liver, or other organ/offal eating by either Stefansson or his friend during the Study as reports indicate a vast majority of meat consumed as being mutton, with that being almost all fatty cuts.

[

citation needed



]

Carbohydrate-restricted diets gained great popularity, particularly in the case of the

Atkins Diet

which emerged in 1972, thanks to

Robert Atkins

. While his diet is not a zero-carbohydrate diet, it does reduce carb intake to a ketogenic level in its initial stages (20 grams daily in

induction

; weekly increase of 5 grams thereafter), allowing followers to take advantage of the fat-burning mechanism that is

ketosis

. According to Atkins, this nutritional approach is more effective for weight loss than a low-fat, “high-carbohydrate diet”, although there has always been much controversy and great dispute amongst healthcare professionals concerning drastic carbohydrate restriction.


[7]

See also

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]

References

[


edit

]

Further reading

[


edit

]

This is is a syndicated post. Read the original at en.wikipedia.org

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