There is a lot of good and accurate info on this board, and there some well meaning and inaccurate informtion on this board. I would actually put the 1200 calories a day to lose weight in the later group as well as some info posted on the Hess method. Here is how NON- DS diet math works
The average person burns 10 calories a day per pound of body weight. So, if you weight 150 pounds, you will burn 1500 calories a day. Now if you add exercise you will burn more. A pound is 3500 calories. If you eat 3500 calories than you burn, you gain a pound. If you burn 3500 carloes than you eat, you loose a pound. This is why those traditional last 10 pounds is so hard. Last time I lost over 100 pounds I built out a preditive model and put in the calories I ate and the exericise I did every day. On a 117 pound 9 month weight lost, the model was off by 1 week.
Whether you have had the DS or not, you body still burns the same amount of calories.
Now add in how @Snowbutterfly worked out the DS Math.
DS math is actually really simple if you know how to calculate percentages using decimals.
Fat is 9 calories per gram and absorbed at 20% = .2
Protein is 4 calories per gram and absorbed about 60% =.6
Carbs are 4 calories absorbed at 100% (Its said complex carbs are absorbed at a lower rate but i calculate it at 100% so I don't eat them).
So for example, if you ate something that had 15grams fat, 20 grams protein, 20 carbs, the math would look like...
Fat- 15g x9= 135 × 0.2 = 27 cal absorbed
Protein- 20g×4= 80 × 0.6 = 48 cal absorbed
Carbs- 20g×4= 80 x 0 = 80 cal absorbed
Eaten total (135+80+80)= 295Hope this helps.
Absorbed total (27+48+80)= 155
well the 3500 calories means burn a pound or gain one would explain why when I was getting TPN I was gaining .5 or 1 pound a day. mý TPN bag wss 3200 calories a day.
When discussing theories like this and others i often wonder how they came to the conclusion. How did they experiment to come up with the theory. Did they not feed someone all day and make them do exercise till they would burn 3500 calories? did they put someone in a room and make them eat 3500 to see a pound gain? I'm not asking you or anyone else to explain im just expressing how amazing science is.