On Thu, 13 Jan 2005 02:03:20 -0500, Keith Thomas <[log in to unmask]> wrote:

> Studies also show that diets that continuously
>restrict carbohydrate (like the Atkins diet) cause a reduction in T3 and
that administering
>cabohydrate can restore T3 levels after they have declined.  This ...
explains why the fat comes
>piling back on once you quit such a diet.  Simply put, any diet that
causes a reduction in T3 levels
>is not a viable means of achieving lasting fat loss."
>

Other low-carb authors mention this very same thing ie Jan McBride MD and
Mauro di Pasquale MD.  Both advocate low-carb with periodic increased carb
feedings.

On the other hand, Stefannson never reported thyroid issues after of year
of all meat.  Perhaps those that never experience any low thyroid symptoms
while on a prolonged low-carb regime had higher leverls of thyroid hormones
to begin with.   Any thoughts on whether after an initial drop in T3
output -- the body could then readjust to the lower carbs and T3 output
would rise again?  Also, the body can make carbohydrate from protein --
perhaps after an initial period of adjustment, the body becomes more
efficient at this.