Lastly, it is thought that insulin itself may cause weight gain. It is not clear as to how or why this might occur.
Paul_c said:Lastly, it is thought that insulin itself may cause weight gain. It is not clear as to how or why this might occur.
It is perfectly clear why Insulin causes weight gain... it is the hormone that tells the body to store glucose as fat in the cells and prevents the fat from being used as fuel while it is present.
Weight gain is one of the most frustrating and seemingly unfair side effects of insulin. While many people gain weight while taking insulin, there are ways to help prevent or reduce the weight gain that often comes with insulin use.
Why Does Insulin Cause Weight Gain?
There are a few different reasons why insulin causes weight gain. Probably, the most significant reason is that insulin reduces the removal of glucose (sugar) through the urine. With uncontrolled diabetes, the body cannot use (or store) glucose properly, and glucose is lost through the urine. This means that you can consume more calories than you need, and your body cannot use it or store it as fat as well as normal. As soon as you correct the situation with insulin, all of a sudden, your body can access the glucose in the blood. Any excess glucose is not lost through the urine; it is stored as fat. In this sense, insulin is not really causing the weight gain; it is simply correcting the problem (high diabetes) that once allowed you to eat more than you needed.
Secondly, insulin can cause episodes of low blood sugar levels (hypoglycemia). Hypoglycemic episodes are very frightening. People who have experienced hypoglycemic episodes due to insulin may be more likely to overeat in order to avoid future episodes. This overeating can lead to weight gain.
Thirdly, some people feel that as long as they take insulin, they can eat whatever they want. While it is true that if you know how to appropriately adjust your dosage, insulin can be used to control blood sugar no matter what (or how much) you eat, insulin does not prevent weight gain from eating too much.
Lastly, it is thought that insulin itself may cause weight gain. It is not clear as to how or why this might occur.
phoenix said:The article quoted by 'Geezer' repeats more simply much that is written in this paper: It's a good explanation as to the why people can put on weight though the latter part is a promotion for the efficacy of levimir as a background insulin.
http://dmh.mo.gov/docs/medicaldirector/ ... rticle.pdf
Here's part of the the abstract: with a my comments in blue
. Insulin-associated weight gain may result from a reduction of blood glucose to levels below the renal threshold without a compensatory reduction in calorie intake, (ie once levels are reduced below about 10 glucose is no longer spilled from the urine but people have got unconsciously used to eating more in an attempt to fuel the body so when their levels are normalised they tend to carry on doing so)
a defensive or unconscious increase in calorie intake caused by the fear or experience of hypoglycaemia, ( The fear of hypos causes some people eat when there levels begin to fall, they may also eat far more than necessary to treat hypos )
or the ‘unphysiological’ pharmacokinetic and metabolic profiles that follow subcutaneous administration. (normal insulin is released through the portal vein, not by absorption through the skin. Theres a world of difference between injecting some insulin when we think we need it and the finely balanced feedback loop of insulin/glucagon in a working system, the paper discusses why this aspect can lead to weight gain)
There is, however, scope for limiting insulin-associated weight gain. Strategies include limiting dose by increasing insulin sensitivity through diet ( (bit of a catch 21 here, the author describes how weight loss through calorie reduction increases insulin sensitivity. For my self it's a matter of watching the scales and intervening by reducing calories before any weight gain becomes significant) and
exercise (i exercise in particular improves insulin sensitivy both short term and long term, indeed the body can get glucose into the muscle cells without insulin during exercise) or by using adjunctive anorectic or insulin-sparing pharmacotherapies such as pramlintide or metformin. ( seems to help some people on insulin ; more so Met in the UK)
Insulin replacement regimens that attempt to mimic physiological norms should also enable insulin to be dosed with
maximum efficiency (MDI and even more so pumps try to do this but they are a long way from perfect replication, even a pump together with a continuous monitoring system is not an artificial pancreas : http://en.wikipedia.org/wiki/Artificial_pancreas
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