Is it a matter of in/out? In other words, eat a pound of food, eliminate 8oz of waste, gain 8oz? If not, why not?
In: 1
I have found very poor weight gain and loss information on forum sites. Rarely does a qualified individual comment and you mostly get people repeating diets ultimately marketed to them. Weight gain is a biologically process that involves the entire body! You are constantly breathing out liquids and gases, exerting waste that is very old, most of the coloring in the poop is from blood cells, which take a long time to make maybe 6 months, meaning a lot of your poop is from mass you ate long over 6 months ago. So, It is very difficult to track the hormones and fat/sugar/protein physics and chemicals both at macro and then micro and back to macro levels. Mix in a little bit of everyone’s body is different and it no longer is a simple 8 oz in 8 oz out.
I recommend you turn your attention to Harvard and other free college resources like MIT that you can find latest up to date studies on.
[https://www.hsph.harvard.edu/nutritionsource/carbohydrates/carbohydrates-and-blood-sugar/](https://www.hsph.harvard.edu/nutritionsource/carbohydrates/carbohydrates-and-blood-sugar/)
[https://ocw.mit.edu/courses/7-05-general-biochemistry-spring-2020/resources/lecture-19-introduction-metabolism-polysaccharides-bioenergetics-intro-pathways/](https://ocw.mit.edu/courses/7-05-general-biochemistry-spring-2020/resources/lecture-19-introduction-metabolism-polysaccharides-bioenergetics-intro-pathways/)
These are the kinds of websites that will have good information but it will take you a couple years maybe Kahns academy has good nutrition classes.
To be honest, there is no way to explain weight gain and loss to a five year old. There are just too many things going on and to simplify it enough for a 5 year old would be lying. There aren’t any metaphors or simple one or two sentence answers for nutrition, those are always wrong. The chemistry, physics and biology behind it all are complex and often boring.
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