A. Dixon

carbonyl Iron is also well-absorbed, and is much easier on most people's stomachs than ferrous sulfate. Heme iron is the best absorbed but is very pricey.

I had RNY gastric bypass surgery whereas you are having duodenal switch so your requirements are a little different from mine. They are actually more extensive than mine. But having said this, I will make the following observations.
Your surgeon office should provide you with a complete list of what Vitamin requirements you will need to take daily.
After surgery I found that I could no longer swallow medium to large pills. As a result I used pill crushers or pill splitters to make them small enough for me to consume. This condition lasted for a couple months and then I was able to swallow them again.
Vitamin chemistry is important for absorption. Calcium supplements should be calcium citrate. There are also different chemistries of B12. I use the sublingual B12 and was told to use methylcobalamin. You cannot use a time-release version of B12. If you are taking Iron supplements, it must be ferrous sulfate for the best absorption. gummy vitamins are not absorbed properly and should be avoided.
It is important to put a 2 hour separation between the Vitamins that contain iron and those that contain calcium. So in my case I found that what works best for me is to take the iron supplements just before bedtime. I put my vitamins in a weekly pill container. I have one container for the morning and one for the night. And I use a very small glass bowl for my calcium supplements. I put my calciums in the bowl in the morning and take them throughout the day. If I am up and about I put my calciums in a ziplock bag and carry them with me.
The directions I received also included a list of those who underwent duodenal switch surgery. These were:
Four Flintstone complete chewable Multivitamins daily.
1800 to 2400 milligrams calcium citrate daily [this can be tricky because the dosage rate is per 2 capsules - therefore this can mean around 6-8 capsules per day of the large size [horse pill] supplements. Even more if you use the petite size.
A total of 5000 International Units of Vitamin D3 Daily.
1000 micrograms sublingual B12 weekly or a B12 injection once each month.
100 milligrams Thiamine (vitamin B1) weekly.
I suspect that after surgery they will place you on a blood thinner for a week or two to prevent blood clots. As a result they will restrict you intake of aspirin (another blood thinner) for the first month or two. Also they may restrict you from taking any other vitamins or medicine during the first few months. Since you are taking prescription medicine for depression, you will want to work these through with your surgeon's office. The absorption rate may vary after surgery.

So I'm 9 days post op and I feel great. I've been walking and sipping as much as I can. The Protein doesn't go down as fast as Water but I'm getting there. Had my first visit with my surgeon today and I have lost a whopping 17 pounds. I'm so happy for myself I'm telling everyone I know like look at me! Lol! Although, I don't see where it's coming from, but I do feel it in my clothes.
On another note to those who are about to start this journey and looking to this site for any clue of what's next to come. Be patient, and always remember everyone is different. As I was looking into this site trying to gather information about what's it supposed to be like post op and I found myself thinking negative about what was next for me. A lot of the things I read were a little on the scary side. So far the only thing I can say is yes I'm hurting internally, but no matter how small the incisions are we have to remember it was a big operation on the inside. So right now I'm just doing my best to keep going and doing what am doing, because I'm going in the right direction according to my doctor of course. Everyone heals differently.

The 'gas' issues with the DS is bariatric surgeon code for "we don't really do that procedure even though we may list it on the website to get you interested in us." Yes, the DS does have some issues with smelly gas and stool for a while due to the incomplete digestion from the malabsorption - you may have experienced some of the same things early on with your bypass, and for the same reasons. It is something to consider, but not really a reason to avoid the procedure as it is something that is managed and treated. Even those of us with the VSG and no malabsorption can run into some of these problems simply because our diets have changed and out gut flora (all those nice little bacteria that live in out intestines that help digest our food) haven't yet adjusted to the new diet. Probiotics can help with those adjustments.
I would be wary about sending any deposits until you establish that they can do the procedure that you want, which I doubt that they can (or that you really don't want them to try.) The DS is a more technically challenging procedure to perform than the other mainstream bariatric procedures, which is why relatively few practices offer it - it takes resources to develop, and particularly to maintain, the requisite skills. The revision from an RNY to a DS is another step above that in complexity, which is why only a few of the experienced DS surgeons offer it (half a dozen or so.).
For a long time, Dr. Gilberto Ungston Beltran was the only surgeon in Mexico that one would consider for a DS. Dr. Aceves was training with him to offer it in his practice before he died, so I would be wary of others that say they offer it - do they really have the experience to perform it, or will they do something else once they get inside? A distal RNY is sometimes offered as an alternative to the DS by surgeons who don't have DS skills - look carefully into that as to whether it would be a viable alternative (though one needs to ask why it is not routinely done?)
If you haven't run into it yet, a good information resource on the DS is dsfacts.com. It doesn't undate that often, but they do have an incomplete list of DS surgeons and a listing of various support sites and forums (including BP!) to check into, as you are pursuing a fairly rare procedure so you should cast your net widely to find others who have been through it. I know several who have done this revision and are quite pleased with the results, mostly thru Drs. Keshishian or Rabkin in California. My best advice would be to save your pennies and scour whatever financial resources that you have to do it stateside with one of the guys with the demonstrated experience to do what you want done - this is not a straightforward sleeve or bypass job.
Good Luck

Check with Dr. Esquerra in Mexicali. I'm unsure if he does revisions but I know many who had his/her DS with him.
I've also sent you a PM.

My 3 month a1c was 5.1 and day 2 after surgery was my last medication for diabetes. When I check I am usually 97-100! God's Blessing. Not fear of blindness, kidney failure or aputation of feet or any other diabetetic complicarions.