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Doctor insights on: Rny Gastric Bypass Diarrhea Cramping Constipation Low Iron B12

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Dr. Oscar Novick
2,160 doctors shared insights

Loose Stools (Definition)

Loose stools is a symptom in which a person's stool (poop) does not hold its shape after it goes into the toilet. Instead of remaining a shaped piece of poop, the poop spreads out in the toilet bowl water. Very loose stool is called diarrhea. Loose stool can be caused by infections, certain foods or drinks, ...Read more


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What does it mean when I have severe stomach cramps and diarrhea every morning? Once I go to the bathroom i'm fine. I had gastric bypass 4 mo ago.

What does it mean when I have severe stomach cramps and diarrhea every morning? Once I go to the bathroom i'm fine. I had gastric bypass 4 mo ago.

"Dumping Syndrome": The symptoms you describe are called "dumping syndrome" and this is common after a gastric bypass and is something that should have been discussed with you by your surgeon prior to your surgery. Please make sure you follow up with your surgeon for appropriate steps you can take to minimize symptoms. ...Read more

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Ferritin level 301, platelets 74, vit d 13 ng/ml hemoglobin is 14.2 good. B12 is bit on the low side at 354 but ok. Gastric bypass in 2003. Lupus?

Ferritin level 301, platelets 74, vit d 13 ng/ml   hemoglobin is 14.2 good.  B12 is bit on the low side at 354 but ok. Gastric bypass in 2003. Lupus?

Lupus: What makes you think it is lupus? Did you have a blood test for anti-nuclear antibodies or any other autoimmune workup? Or do you have any symptoms? If you have concerns, go see a rheumatologist. ...Read more

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If ferritin level is high (double uln) but iron and tibc are low in pt. With remote gastric bypass, is iron replacement still recommended.?

If ferritin level is high (double uln) but iron and tibc are low in pt. With remote gastric bypass, is iron replacement still recommended.?

Probable: A high ferritin can be interpreted as an acute phase reactant or chronic inflammation, but if your iron level is low, this can suggest deficiency. Having gastric bypass does cause iron absorption issues including others such as calcium. Routine specific labs are recommended for all bypass patients. Have your primary take a further look at this whether you would need chronic iron supplements. ...Read more

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if I have very low iron levels in my blood history of gastric bypass...and supplements aren't helping lunch, what would he the next best step?

if I have very low iron levels in my blood history of gastric bypass...and supplements aren't helping lunch, what would he the next best step?

Common problem: After gastric resection , due to by passing duodenum iron is not absorbed , will have low serum feritin levels , especially bigger problem in young females , need to take more oral iron , iron containg foods like liver , meats , oysters etc. Vit c found to help iron absorption , must take vitamin c with ferrous sulfate , rarely need parental adminstration of iron in severe cases. ...Read more

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Gastric bypass 6 months ago. Is 2500 mcg b12/daily too much? Will my kidneys jus flush out the excess essentially wasting it?

Gastric bypass 6 months ago. Is 2500 mcg b12/daily too much? Will my kidneys jus flush out the excess essentially wasting it?

Yes, you are wasting: Daily requirement of B12 is less than 3 microg , even with gastric by gastric bypass you produce intrinsic and can absorb it in the distal ileum , any excess beyond liver storage capacity will be eliminated by the body . Vegans also need supplementation . Speak to your doctor , if you want your B12 levels could be checked. ...Read more

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I have a high level of Vitamin B12 (2000). I wonder if taking METANX CAPSULE PANAM could be causing my problem? Also I did have a gastric bypass in

Probably: Metanx does, in fact, contain B12 vitamin supplement. It also contains the active form of folic acid, known as methyl folate. Gastric bypass patients usually do not absorb vitamins from their food as well and many physicians will use supplements to make sure patients get the nutrients they need to promote health and well being. ...Read more

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I Had Gastric Bypass Surgery Rny and I'm having constipation problems my surgeon told me I could use stool softener I don't know witch one is good?

I Had Gastric Bypass Surgery Rny and I'm having constipation problems my surgeon told me I could use stool softener I don't know witch one is good?

DSS: A commonly used stool softener is docussate sodium, or DSS (brand name Colace). Its a gel- capsule, and it softens and lubricates your stools. Increasing soluble fiber and drinking plenty of fluid is an even better and more healthy way to soften your stools. Add at least 2 tablespoons of soluble fiber (Metamucil, Citrucel, etc.) to a glass of juice or on cereal each day is usually enough. ...Read more

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I am having constipation issues and need help i have also had a gastric bypass in 2006 and have never been regular i drink coffee every day, tea, oj, and crystal light. I take 325 mg of iron daily, tylenol 3, 3 calcium citrate daily and 2 vitamins daily.

I am having constipation issues and need help
i have also had a gastric bypass in 2006 and have never been regular i drink coffee every day, tea, oj, and crystal light. I take 325 mg of iron daily, tylenol 3, 3 calcium citrate daily and 2 vitamins daily.

Can make changes: Try switching to a less constipating form of iron (e.g., ferrous bisglycinate) and try to moderate consumption of diuretic drinks like coffee/oj. Magnesium and vitamin c supplementation can also help with constipation (although mg+ can interfere with calcium absorption if you're low). For vit c, start with buffered powder, add a heaping 1/2 tsp to water/juice, & increase by 1/2 tsp/day until ok. ...Read more

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12 years post op rny, iron 20 & vitamin d at 10. Seeing a new dr that hasn't worked with deficient gastric bypass, is 325ferrous 3x and 2000d 1x okay?

12 years post op rny, iron 20 & vitamin d at 10. Seeing a new dr that hasn't worked with deficient gastric bypass, is 325ferrous 3x and 2000d 1x okay?

Nutrition!: A gastric bypass is a very complex nutrition situation. If your physician has not dealt with it much i would suggest asking for a referral to a nutritionist or a bariatric center. That being said, the dosage of iron is fda approved treatment for iron deficiency, and the vitamin d is a reasonable amount. You have many nutrient levels that should be monitored and carefully watched! ...Read more

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How to absorb more iron after having roux-n-y gastric bypass surgery since iron is absorbed in the beginning of your small intestines, which is bypassed after roux-n-y gastric bypass, where else can it be absorbed enough to keep your iron level up

How to absorb more iron after having roux-n-y gastric bypass surgery since iron is absorbed in the beginning of your small intestines, which is bypassed after roux-n-y gastric bypass, where else can it be absorbed enough to keep your iron level up

Generally : Generally the malabsorption seen after a roux-en-y lasts for about 18 months and eventually diminishes, so iron absorption will likely improve at around that time. If you simply can't get adequate iron, make sure your doctor looks at your ferritin level and not just hemoglobin level. You may indeed benefit from iron infusion or if you happen to be a premenopausal women with a heavy period, you may benefit from discussing birth control pills to help diminish the degree of bleeding that occurs each month with your menstrual cycle. ...Read more

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Is it normal not to have bowel movement every day after the gastric bypass. I got it 4 years ago and I stay constipated and I drink plenty of water.

Is it normal not to have bowel movement every day after the gastric bypass.  I got it 4 years ago and I stay constipated and I drink plenty of water.

See below: Constipation is also seen in patients following bariatric surgery. This occurs more commonly after LAGB and RNYGBP and is less likely with DS, although it may occur in rare cases with DS. It is usually due to insufficient intake of water, and may be corrected by diligent attention to water ingestion and the addition of fiber products like Metamucil or Fibercon. ...Read more

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I am 1 year out from my gastric bypass. I am extremely constipated. I have tried stool softners, milk of magnesia, (magnesium hydroxide) .Suppositories, enema. Help...

I am 1 year out from my gastric bypass. I am extremely constipated.  I have tried stool softners, milk of magnesia, (magnesium hydroxide) .Suppositories,  enema. Help...

Constipation: None of those will help unless you are drinking enough liquids. Constipation is very common among people who have had weight loss surgery. You need to make sure you are drinking at least 64 ounces of liquid (water is fine) a day. If that doesn't help, try taking MiraLAX (polyethylene glycol) daily as well. The key is liquid intake. ...Read more

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Had gastric bypass 3 yrs ago, past 2 months been hungry a lot.Irregular, constipated, bloating take probiotic.Today pain off /on, is it stomach virus?

Gastric bypass: It seems as if things went OK for three years and now it has changed. Without too much delay please discuss this with your primary doctor. Perhaps more importantly, you must see a Psychologist regarding your depression and anxiety. Things will get better but not overnight. You will do fine! Please keep me posted. ...Read more

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I had gastric bypass 7 years ago and now have horrible leg crampring in the inside of my thighs. What can I do?

I had gastric bypass 7 years ago and now have horrible leg crampring in the inside of my thighs.  What can I do?

See your doc: Could be related or not. Religiously taking your vitamin supplements, watching your diet? On any meds? Got diarrhea? Heavy periods, pregnancies? All could be factors. Can't tell here. See a doc, get examined, get blood tests. ...Read more

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Dr. Gregg Nishi
468 doctors shared insights

Gastric Bypass Surgery (Definition)

Gastric bypass surgery is a restrictive and malabsorptive procedure to help lose weight. Restrictive is in the fact that the stomach is down sized to a 2 oz pouch and malabsorptive is in bypassing part of the stomach and 100 to 150 cm of the small ...Read more


Dr. Randy Baker
1,000 doctors shared insights

Vitamin B12 (Definition)

Vitamin B12 is a vitamin which is a kind of nutritional agent ...Read more