Aivot tykkäävät ravitsemusterapeutin haukkumista ketoneista:Diet Doctor: Food for thought: Does the brain need carbs?
Epilepsy: Although usually not completely devoid of carbs, the classical ketogenic and modified Atkins diet restrict carbs to less than 20 grams per day – providing well below the 100+ grams of glucose needed by the brain. Well-designed trials have shown that strict carb restriction can be very effective in reducing and in some cases eliminating seizures in children and adults.11
Mental health conditions: While research is preliminary, anecdotal evidence, basic neurochemistry studies and a few promising clinical trials have suggested a ketogenic diet may improve symptom control for some mental health conditions. For example, bipolar disorder-which research is showing shares a number of features with epilepsy- may improve on a ketogenic diet.12 Read more in our guide on low-carb and mental health.
Traumatic brain injury (TBI): Trauma to the brain can impair its ability to use glucose efficiently and may lead to elevated blood sugar levels. According to some studies, a carb-free or ketogenic diet may provide an alternative fuel to the brain as it heals, thus giving benefits to people who have sustained TBI’s, although the most promising results to date have been shown in animal research.13
Alzheimers: In Alzheimer’s disease there is documented insulin resistance in the brain that hampers the uptake of glucose for fuel, so much so that some researchers have called Alzheimer’s “Type 3 diabetes.”14 It has been known since the early 1980s, through the use of PET scanning, that brain glucose metabolism is impaired by up to 40% in individuals with Alzheimer’s and the problem shows up on imaging studies of the brain many years before cognitive problems begin to show.15Studies have found, however, that while glucose uptake is impaired in early Alzheimer’s, the brain’s use of ketones for energy is not.16 Two recent notable clinical studies, one in 2012 and one in 2017, showed preliminary but promising results of using a ketogenic diet for people with Alzheimers.17 Two more clinical trials are now underway.
Hunger control: A carbohydrate-free diet suppresses the “hunger hormone” ghrelin that is secreted mainly by the stomach. Ghrelin has multiple impacts in the body but one impact is on the brain’s hypothalmus to regulate appetite control.18 It also travels to the amygdala, the brain’s reward center. This means that in a body burning ketones, the brain is receiving reduced hunger signals, which may enhance weight loss and diabetes control.19 Importantly, although considered high-quality research, these studies are very small. Nevertheless, they provide clinical evidence that helps confirm what many people report after adopting a carb-free diet —they feel much less hungry.
Muisti-ihme Mattias Ribbing on tehnyt kaikki muistamiskoe-ennätyksensä ketoosissa. Piilaaksossa maksimaaliseen henkiseen suorituskykyyn pyrkivät ihmiset buustaavat päänuppiensa toimintaa ketoilemalla.