Post-bariatric Surgery Vitamins and Minerals

After a bariatric procedure, you must take vitamins and minerals every day for the rest of your life. However, post-bariatric surgery vitamins and minerals are different for each surgical procedure, so make sure you look at the list pertaining to your specific procedure.

Roux-en-Y Gastric Bypass Vitamins and Minerals

Gastric bypass surgery is a restrictive and malabsorptive procedure; instead of removing part of the stomach, the size of it is reduced, and the digestive tract is rerouted.

But when you opt for a bypass, your stomach doesn’t get the chance to absorb all the key nutrients your body needs, which is why you require more daily vitamins and minerals. The following nutritional additions can help to offset the lacking dietary components:

Bariatric Advantage Multivitamin

Because of malabsorption and the general reduction of food consumption, your diet will lack the essential nutrients your body needs to function following gastric bypass surgery.

But a reliable multi-vitamin can fill these gaps with adequate iron, vitamin D and thiamin, to name a few. We recommend taking two chewable Bariatric Advantage tablets a day.

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Calcium Citrate

Taking calcium every day will help you develop strong teeth, bones and contribute to muscle development. Without adequate levels of calcium in the bloodstream, your body is forced to start taking calcium from your bones.

The advantage of taking calcium citrate over another calcium supplement, such as calcium carbonate, is that it’s friendly to post-bariatric digestive systems because it’s more easier for your stomach to absorb.In addition, studies have shown that calcium carbonate post-op can cause kidney stones.

We recommend taking 1500 mg of chewable calcium citrate per day with Vitamin D 400 IU.

Vitamin B12

Like iron, B12 aids the body’s hemoglobin production. Known for its energy stimulating properties, this vitamin boosts the activities of the central nervous system. For these reasons, the best time to take B12 is first thing in the morning.

We recommend taking up to 5000 mcg per day of sublingual B12, or getting B12 injections from your primary care physician every month.


The small intestine is a key player in iron, which is an essentialbuilding block of red blood cells. However, bariatric surgery can interrupt this process. Young females — in particular — require a lot of iron.

For non-menstruating women, we recommend taking at least 18 mg in the form of a supplement per day. Women who are menstruating should take double that, or 36 mg daily.


Also known as Vitamin B1, thiamine is an immune system fortifier, diabetic neuropathy reliever, carbohydrate metabolizer and digestive regulator. It’s found in meats, beans, grains and nuts.

Although you’ll be eating those foods following gastric bypass surgery, it won’t be enough to produce the amount of thiamine you require. You’ll need between five and 300 mg every day. Optimize this supplementation by taking it in the a.m.

Vertical Sleeve Gastrectomy Vitamins and Minerals

Gastric sleeve surgery is a purely restrictive procedure; it involves actually removing about 80 percent of your stomach. And since your stomach absorbs nutrients the same way following gastric sleeve surgery, you really only need to take a multivitamin and a calcium citrate supplement.

Bariatric Vitamin Schedule

You’ll be able to maximize the effectiveness of each supplement if you take them at the same time every day. Below is the schedule we recommend you follow.

Breakfast: Multivitamin, calcium and thiamine
Lunch: Multivitamin and calcium
Dinner: B12 and calcium
Bedtime: Iron