Вход
Регистрация
One problem may be that lean individuals can't make enough ketones to exert a protein
sparing effect; this is a consequence of the difficulties in mobilizing fatty acids in the first place.
Even during total starvation, when you'd expect ketosis to have the greatest impact, ketones
aren't protein sparing in lean individuals (<15% bodyfat or so). Perhaps this is the shining
moment for MCTs, by producing ketones in larger amounts, we can exert a protein sparing effect
beyond simply providing quick fat energy. Assuming protein intake is sufficient in the first place,
I still tend to doubt ketosis has any huge advantages in this regards. If it does, it simply hasn't
shown up in real world experience. Bodyopus did generate better fat loss and less muscle loss for
some people, but I suspect this had more to do with the carb-load.
A second argued advantage is that ketones are inefficient, that you'll lose more fat for a
given calorie deficit in ketosis than without. The mechanism given is that one pound of fat
converted to ketones doesn't provide the same energy as one pound of fat burned directly. This
may be somewhat true but the difference is minor, amounting to a few percentage points at
most. As well, except in very obese individuals, most tissue of the body aren't using ketones past
the first couple of weeks; they are using fatty acids. There is also a small loss of ketones in the
urine but this also tends to amount to very little. As with the protein sparing effect, increased fat
loss from being in ketosis just hasn't shown up in the real world with lean athletes and
bodybuilders.
For the most part, I simply see ketosis as a "side-effect" of fat loss (burning to be more
accurate), more than something to be explicitly sought out. That is, when you accelerate fat
oxidation with the methods above, you tend to enter ketosis. Ketosis in and of itself isn't any big
deal. For that reason, I won't talk about monitoring ketone levels with Ketostix or anything like
that. Frankly, using a low-carbohydrate/ketogenic diet for the fat loss phase of the UD2 has
more to do with lowering insulin, raising catecholamines, and ramping up fat oxidation; ketosis is
simply a tangential effect. A low-carbohydrate diet is also the only way to reduce calories as low
as I'm going to suggest; there simply isn't caloric room for many carbohydrates in the fat loss
phase of the diet.
Наверх
