Are you losing fat or fluids if you diet and drink alot?
A friend is on an extreme diet that includes acupuncture (amongst other) - his diet is that 2 days he isn't eating anything (literally) and the rest he eats very little - up to twice a day, 1 portion chicken, 1 yogurt etc - He can drink (and should) drink every day - he claims he drinks as many as 3+ liters of water a day - and still lost 6 kilos in the past 2 weeks.
My question: Did he lose fluids? or actual fat? (carb->>energy etc.etc.)
If you drink so much a day, and still lose weight, is that also fluid drop?
p.s. - he is not a tall person, and original weight is 110Ks. (more a chubby person than fat)
He did lose 2 belt holes, and looks thinner in his face.
EDIT sep-16-2012: Not sure why you think this Q is off topic, but I will still update: Current loss weight stands at 9KG - He still holds this formula. I think he will 'lose' all that he lost once he starts living though.
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Carbohydrates attach to and retain water, so when your glycogen stores are reduced from alow carb diet, there is accompanying water weight loss imperfect citation here. This is often responsible for early, fast weight loss of up to 10 lbs. This rate of weight loss is not sustainable because once glycogen is depleted, the effect stops. The water extra water that the person drinks can not be retained because it has to attach to some other molecule to avoid being flushed out.
On the other hand, the diet you are describing sounds like a starvation diet, which might cause significant weight loss, and might also cause health problems.
If you know how tall he is, you could do some calculations. This site calculates the basal metabolic rate, given weight, height and age.
A 30yr old male of 110kg and height of 1.8 m, will have a BMR of 9500kJ/day. (The formula is just an approximation, and actual BMR will depend on many other factors)
Next, note that 1kg of Fat stores 37000kJ of energy. This means that in order to lose 1kg of fat, the 30yr old man above would have to fast for 37000/9500 = 3.9 days. After two weeks of fasting, he would lose (14*9500)/37000 = 3.5kg. This is if he was not eating anything at all for 2 weeks and doing no exercise. If he were to exercise in addition, he could possibly lose 7kg of fat in the two week period.
In your scenario the man is only fasting 2 days a week. I therefore think it is unlikely he would have lost 6kg of fat in the two week period. In the above example, if protein was burnt instead of fat, he could have lost 14kg of protein, since 1kg of protein stores half the energy content that 1kg of fat stores.
Therefore I assume his weight loss could be attributed to a combination water, fat and protein, but not all to fat. Also body weight varies throughout the day, so perhaps he did not weigh himself at the same time of the day when he calculated his 6kg loss.
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