/fit/ - Fitness, Health, and Feels

Absence of carbohydrates/sugar is a con

>>145716

Why?

>>145716

Just eat an apple or banana with it

>>145717

Because carbohydrates are good for you in a sense similar to air being good for you

https://en.wikipedia.org/wiki/Carbohydrate_metabolism

>Carbohydrates are central to many essential metabolic pathways.[1] Plants synthesize carbohydrates from carbon dioxide and water through photosynthesis, allowing them to store energy absorbed from sunlight internally.[2] When animals and fungi consume plants, they use cellular respiration to break down these stored carbohydrates to make energy available to cells.[2] Both animals and plants temporarily store the released energy in the form of high energy molecules, such as ATP, for use in various cellular processes.[3]

Mergenthaler, Philipp, et al. Sugar for the brain: the role of glucose in physiological and pathological brain function. Trends in neurosciences 36.10 (2013): 587-597.

https://dx.doi.org/10.1016%2Fj.tins.2013.07.001

>The mammalian brain depends on glucose as its main source of energy. In the adult brain, neurons have the highest energy demand [1], requiring continuous delivery of glucose from blood. In humans, the brain accounts for ~2% of the body weight, but it consumes ~20% of glucose-derived energy making it the main consumer of glucose (~5.6 mg glucose per 100 g human brain tissue per minute [2]).

Plaskett, L. G. On the essentiality of dietary carbohydrate. Journal of nutritional & environmental medicine 13.3 (2003): 161-168.

https://doi.org/10.1080/13590840310001619405

>Carbohydrate depletion occurs in starvation or at times when only protein and fat are being eaten. The resulting ketosis is due to the body's inability to carry out net synthesis of new carbohydrate from ketogenic metabolites. The resulting ketosis leads to acidosis, which may induce respiratory and oxygenation effects and negative effects upon renal function, bone mineral, calcium and nitrogen balance and upon the nervous system. The body's ability to form limited carbohydrate from either protein or glycerol should serve to provide those essential tissue and cellular structures which have a carbohydrate basis. Evidence of a need for dietary carbohydrate is provided by the increased incidence of some human chronic diseases associated with markedly elevated long‐term intakes of either protein or fat. Carbohydrate then appears to become essential by default, due to the need to provide adequate calories while maintaining protein and fat at adequate but not excessive levels.

Koski, Kristine G., Fredric W. Hill, and Lucille S. Hurley. Effect of low carbohydrate diets during pregnancy on embryogenesis and fetal growth and development in rats. The Journal of nutrition 116.10 (1986): 1922-1937.

https://doi.org/10.1093/jn/116.10.1922

Elwyn, D. H. The unique role of glucose in artificial nutrition: impact of injury and malnutrition. Clinical Nutrition 7.4 (1988): 195-202.

https://doi.org/10.1016/0261-5614(88)90038-6

>So, it is safe to conclude that human subjects rarely if ever get fat on diets containing carbohydrate and protein in excess of energy requirements.

…

>This hypothesis is supported by in vitro studies of rates of lipogenesis in rats and humans.

https://bio.libretexts.org/Bookshelves/Microbiology/Book%3A_Microbiology_(Boundless)/5%3A_Microbial_Metabolism/5.04%3A_Glycolysis/5.4A%3A_Importance_of_Glycolysis

>Nearly all of the energy used by living cells comes to them from the energy in the bonds of the sugar glucose.

>>145722

Maughan, Ron. Carbohydrate metabolism. Surgery (Oxford) 27.1 (2009): 6-10.

https://www.surgeryjournal.co.uk/article/S0263-9319(08)00282-2/fulltext

>Glucose is an essential fuel for the brain and for some other cells, notably red blood cells. Because body carbohydrate reserves are limited, and also because stored fatty acids cannot be converted to carbohydrate, the metabolism of carbohydrates in different tissues is tightly regulated. Some de novo synthesis of glucose is possible from non-carbohydrate sources, including glycerol and the carbon skeletons of some amino acids. Excess dietary carbohydrate is generally oxidized rather than stored.

https://en.wikipedia.org/wiki/Cellular_respiration#Aerobic_respiration

>C6H12O6 (s) + 6 O2 (g) → 6 CO2 (g) + 6 H2O (l) + heat

https://en.wikipedia.org/wiki/Cellular_respiration#Glycolysis

Glycolysis is a metabolic pathway that takes place in the cytosol of cells in all living organisms. This pathway can function with or without the presence of oxygen. In humans, aerobic conditions produce pyruvate and anaerobic conditions produce lactate. In aerobic conditions, the process converts one molecule of glucose into two molecules of pyruvate (pyruvic acid), generating energy in the form of two net molecules of ATP.

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>>145734

What are you trying to say about ketogenic and zero carb diets? They simply aren't healthy. Aerobic respiration and glycolysis are metabolically essential to a human and especially important to the brain. The only reason someone can survive die slowly on no carb diets is that glucogenic amino acids exist which can be converted to glucose and triglycerides have a glycerol backbone which can also be turned into glucose or enter glycolysis itself. I don't understand survival diets. Everyone should be aiming to thrive. Glucose aids liveliness.

Brown, Laura J., et al. Lethal hypoglycemic ketosis and glyceroluria in mice lacking both the mitochondrial and the cytosolic glycerol phosphate dehydrogenases. Journal of Biological Chemistry 277.36 (2002): 32899-32904.

http://www.jbc.org/content/277/36/32899.short

Kanetake, Jun, et al. The relationship of a high level of serum beta-hydroxybutyrate to cause of death. Legal Medicine 7.3 (2005): 169-174.

https://doi.org/10.1016/j.legalmed.2005.01.003

>Maybe if you want to gain weight different story

What kind of weight? Increased energy production from glucose will help muscle growth and maintenance of its structure and function. Increased fat intake will readily contribute to body fat, while glucose does not easily contribute to body fat stores itself.

>>145736

>>145723

>>145722

>rat studies

>articles that are all speculation, no sources

>a bunch of diabetics and alcoholics died, so you will too

>>145717

Carbs are good for muscle synthesis. takes a lot of fast energy, and carbs give you that.

>>145795

This is true, unless your mitochondria are damaged. If they are, your cells have to result to fermentation in order to create ATP. You get 2 ATP per glucose molecule from fermentation and 38 from normal metabolism. Your body can't restore the mitochondria to their good state when you're burning carbs.

>>145796

not if your midichlorians are off the charts

>drinking shit

>eating food

A true patrician starves himself.