Jemma O'Hanlon. As with anything related to the body, the amount of food we need to eat before it ends up as body weight depends on the individual.
Each person has their own energy requirement which varies depending on numerous factors such as age, height, illness and activity. We also use energy in order to complete conscious tasks such as walking, lifting and talking. On top of this, the body then uses up energy when we exercise, meaning the more exercise you do the more energy you will burn off. All the daily activities we complete like walking to the train station, taking the stairs or even doing household chores will add up.
To gain 0. In calories, this equates to an additional plus calories per day that our body doesn't burn off, which isn't much at all. It's often when we eat past the point of being full that we're likely to gain weight.
While the actual rate people can gain weight varies and depends on the individual and their metabolism, age, height, fitness and state of health, it does not happen overnight. Eat slowly and listen to your body, and stop when you feel comfortably satisfied. If you're eating until you're stuffed full, chances are you're eating more than your body needs. If you have weighed yourself at one time of the day and noticed your weight has increased a few hours later, O'Hanlon says this is not the result of 'instant weight gain'.
This food or drink will first be digested, the waste excreted to put it politely and the excess energy stored as fat. The food then travels through the large intestine where further digestion and absorption of water occurs, before it is then eliminated from the body. The stomach breaks food particles up into tiny pieces that the body can absorb. From the stomach, the food passes to the small intestine. The small intestine is where most of the absorption takes place.
There are even more enzymes released into the small intestine so single molecules can be absorbed and enter the blood stream. Whatever is not absorbed across the small intestine wall goes to the large intestine, which can take about hours before it is finally eliminated from the body.
So, when you eat a meal the nutrients from the food can be absorbed into the blood stream in about less than 10 hours, but the undigested food particles may not get eliminated from the large intestine for a day or two. The type of food you eat can also impact the rate of digestion. Fiber can slow down the rate of simple sugars going into the blood stream from the small intestine, and protein can increase the time needed for break down in the stomach.
See also: How to aid digestion. On the contrast, eating foods that are mostly simple carbohydrates can provide quick energy that may be available quickly. Once the digested food is in the blood stream, the body can use it for immediate fuel or store it. This is where there are a lot of factors, and there is not a simple equation to determine where that energy will be used or how.
If you are getting energy absorbed into the blood stream, like simple sugars, then the hormone insulin will have a strong role in determining the fate of the energy.
The pretty much only thing you need to know is the calorie content of a certain food. I would caution you about explaining why you asked this question.
Personal medical advice is strictly off topic here, so making the question about you might lead to closure. The question has a lot of upvotes because it's a good question. I, for one, would like to see a good answer. Show 4 more comments. Active Oldest Votes.
Rates of conversion A comparison of citrate and acetate incorporation into fatty acids Improve this answer. Thank you for the infos. I can't quite extract that from your post. Do you have anything on that? This answer actually does not answers the question, but shows that the question, as general as it is, is unanswerable. Also, it is not clear what is the starting point to measure the time: when someone puts the food in the mouth or when the nutrients are absorbed into the blood.
Jan yes, it really depends. It is answerable with a number, but that range of number would be very wide and would be very difficult to measure in the first place.
Transit of food and absorption is easy to measure but, we will need to measure individual enzymes involved e. During my research, I can't seem to find an article regarding the exact rate of conversion and only managed to find the closest average which I already have posted.
I will revisit the matter as soon as more research material is available. For this concept to work to get at least a range of numbers , you would need to have a very specific scenario: knowing your level of hydration, exact salt intake in last week, exact nutrient composition of every single food you eat, etc. Jan Not really. All these peripheral factors will balance out over time many months and leave the contribution of each kind of food as the main causal factor.
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