The body does not run on meals.<\/p>\n
It runs on a store, and meals top the store up. Skip enough of them and the store is simply what remains.<\/p>\n
Which turns the question from how long a person can go without food into something narrower and much stranger<\/strong>.<\/p>\n How large is the store, what runs out first, and is it the fuel at all.<\/p>\n The answer for most people is that fuel is not the limit and never was.<\/p>\n Something else gives way long before it<\/strong>.<\/p>\n For the first day or two the body burns the sugar it has on hand and then starts making more from protein, which means taking it out of muscle.<\/p>\n That is the expensive phase, and if it continued at the starting rate a person would lose dangerous amounts of lean tissue inside a month.<\/p>\n It does not continue, because the liver begins converting fat into ketone bodies and the brain adapts<\/strong> to running on them instead.<\/p>\n Once that switch is complete the demand for new sugar collapses, protein breakdown drops to a fraction of its early rate, and fat becomes almost the only fuel in use.<\/p>\n From that point the runway is set purely by how much fat there is, and a very heavy person is carrying an enormous one.<\/p>\n The store lasts far longer than expected<\/strong>.<\/p>\n What the store cannot supply is everything that is not energy.<\/p>\n Fat contains no potassium, no sodium, no vitamins and no trace minerals, so a long fast has to be topped up from outside or the chemistry goes wrong.<\/p>\n The intake in this case was tea, coffee, sparkling water, yeast extract and a multivitamin, with potassium and other electrolytes added<\/strong> when blood tests called for them.<\/p>\n Toward the end he sometimes took milk or sugar in the tea, which is the only calorie intake recorded anywhere in the account.<\/p>\n He was in hospital at the start and living at home for most of it, coming back for blood and urine samples on a schedule.<\/p>\n The supervision was the entire method<\/strong>.<\/p>\n The fast ran from June of 1965 to June of 1966, in the care of a hospital in Dundee, with the patient aged 27 when it began.<\/p>\n He started at 456 pounds and finished at 180, a loss of 276 pounds over 382 days.<\/p>\n That works out at about three quarters of a pound a day, sustained without a break for more than a year.<\/p>\n The case was written up in a medical journal in 1973, and the authors reported that no ill effects<\/strong> had followed from the fast itself.<\/p>\n The same follow up found him at 196 pounds, which is 16 pounds above where he finished and a long way below where he started.<\/p>\n The regain almost never happens. Here it mostly did not<\/strong>.<\/p>\n A single case is a data point, not a protocol, and the era it belongs to explains why nobody repeated it at scale.<\/p>\n Total fasting was briefly fashionable as an obesity treatment in the 1960s, and it produced deaths. A report published in 1965 described lactic acidosis and a fatal outcome<\/a> in a patient treated exactly that way.<\/p>\n The failure mode is not running out of fat. It is potassium and magnesium falling far enough to disturb the heart, or the shock of refeeding after a long gap.<\/p>\n Neither of those announces itself. Both are found by blood test, which is why the checks were the part that mattered and the hunger was not.<\/p>\n So the case stayed a case, in the way that a one of a kind machine<\/a> or a laboratory concrete<\/a> stays a demonstration<\/strong>.<\/p>\n Records of this type are also no longer recognized<\/strong>, since publishing them encourages people to try without any of the monitoring.<\/p>\n Strip away the record and one finding survives, and it is not about willpower.<\/p>\n It is that the human fat store is very large and the body is very good at switching over to it, which is a piece of physiology rather than an achievement.<\/p>\n Modern work on medically supervised fasting reaches the same place from the other direction, reporting mostly mild effects under observation and serious events in a tiny fraction<\/a> of visits, while being explicit that the long fasts of that earlier era carried real danger.<\/p>\n The variable is not the person. It is whether somebody is reading the blood work.<\/p>\n Anyone considering prolonged fasting should be doing it with a doctor, and the record above is a reason for that rather than against it.<\/p>\n The supervised fast<\/strong> was not a feat of endurance.<\/p>\n It was a year of monitoring<\/strong>.<\/p>\n","protected":false},"excerpt":{"rendered":" The body does not run on meals. It runs on a store, and meals top the store up. Skip enough of them and the store is simply what remains. Which turns the question from how long a person can go without food into something narrower and much stranger. How large is the store, what runs out … Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":3179,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[],"class_list":["post-3180","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"_links":{"self":[{"href":"https:\/\/www.ecoportal.net\/uk\/wp-json\/wp\/v2\/posts\/3180","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ecoportal.net\/uk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ecoportal.net\/uk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ecoportal.net\/uk\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ecoportal.net\/uk\/wp-json\/wp\/v2\/comments?post=3180"}],"version-history":[{"count":3,"href":"https:\/\/www.ecoportal.net\/uk\/wp-json\/wp\/v2\/posts\/3180\/revisions"}],"predecessor-version":[{"id":3327,"href":"https:\/\/www.ecoportal.net\/uk\/wp-json\/wp\/v2\/posts\/3180\/revisions\/3327"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.ecoportal.net\/uk\/wp-json\/wp\/v2\/media\/3179"}],"wp:attachment":[{"href":"https:\/\/www.ecoportal.net\/uk\/wp-json\/wp\/v2\/media?parent=3180"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ecoportal.net\/uk\/wp-json\/wp\/v2\/categories?post=3180"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ecoportal.net\/uk\/wp-json\/wp\/v2\/tags?post=3180"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}The fuel switch happens in the first week<\/h2>\n
Tea, coffee and a multivitamin<\/h2>\n
Three hundred and eighty two days on the record<\/h2>\n
Why this never became a treatment<\/h2>\n
What the case actually proved<\/h2>\n