? for WLS Grads about losing weight at a few yrs out
The only permanent aspects of RNY are the lack of VITAMIN absorption (because the portion of the intestine that is bypassed is the primary area that some of the vitamins are absorbed) and the small pouch rather than your old, full stomach.
Your body is smart enough to realize that you have had part of your intestine bypassed and it starts adapting to it the caloric malabsorption from almost the very beginning. By altering the part of the intestine that is NOT bypassed, the body is able to overcome approximately 80-90% of the malabsorption by 18-24 months out. (Your stomach does not absorb nutrients, just your intestine.)
The info about the possible permanent effect on metabolism originally came from my surgeon and then from one of the medical journal articles I read while I was researching RNY. Not everyone has their metabolism permanently affected, but many do. We already all know that years of yo-yo dieting screws your metabolism up permanently... and this surgery (and the severe caloric restriction of the first 6-9 months) is just MORE of that... your body knows it is getting very few calories (and that you are losing your fat stores) rigth after surgery, so it attempts to preserve those fat stores by dropping your metabolism... so when we are only taking in 800 calories a day for months on end, and then only increase the caloric intake to 1200-2000 calories afetr we are in maintrenance mode (which is much less than we were consuming for years pre-op), the body sometimes keeps the lowered metabolism. That is why it can be so easy to regain the weight -- even easier than pre-op for some -- by simply taking in a few too many calories or carbs for a period of time.
Lora
Your body is smart enough to realize that you have had part of your intestine bypassed and it starts adapting to it the caloric malabsorption from almost the very beginning. By altering the part of the intestine that is NOT bypassed, the body is able to overcome approximately 80-90% of the malabsorption by 18-24 months out. (Your stomach does not absorb nutrients, just your intestine.)
The info about the possible permanent effect on metabolism originally came from my surgeon and then from one of the medical journal articles I read while I was researching RNY. Not everyone has their metabolism permanently affected, but many do. We already all know that years of yo-yo dieting screws your metabolism up permanently... and this surgery (and the severe caloric restriction of the first 6-9 months) is just MORE of that... your body knows it is getting very few calories (and that you are losing your fat stores) rigth after surgery, so it attempts to preserve those fat stores by dropping your metabolism... so when we are only taking in 800 calories a day for months on end, and then only increase the caloric intake to 1200-2000 calories afetr we are in maintrenance mode (which is much less than we were consuming for years pre-op), the body sometimes keeps the lowered metabolism. That is why it can be so easy to regain the weight -- even easier than pre-op for some -- by simply taking in a few too many calories or carbs for a period of time.
Lora
14 years out; 190 pounds lost, 165 pound loss maintained
You don't drown by falling in the water. You drown by staying there.
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