Vitamin Recommendations

Vitamins and supplements are a very important part of your post-surgery routine. 


With a smaller tummy, it can be difficult to get all the necessary vitamins and minerals from foods alone. We want to help you maintain proper nutrition and good health and energy after surgery. Our bariatric doctors recommend taking the following vitamins, minerals, and supplements after your surgery. These are only recommendations, make sure to consult with your doctor at home as well. After your post-surgery labs are completed, you may need to adjust accordingly.

Bariatric Multi-Vitamins

Start taking bariatric multi-vitamins within 5 to 7 days upon your return home. You are eating less food, and good quality bariatric multi-vitamin and mineral supplements will help guard against nutritional deficiencies. We say “bariatric” multi-vitamins are best, at least for the first year post-surgery.  (After one year, a standard dose adult multi-vitamin may be considered according to lab results)

These vitamins are formulated specifically for weight loss surgery patients. They contain much higher doses than standard adult multivitamins and are strongly recommended during the first year post-surgery. After one year,  it may not be required to take these higher doses so getting follow-up lab work is necessary to determine this.

Amazon has a huge selection of bariatric multi-vitamins and supplements available. These high dose formulas may be taken for the first year post-op.  If you are unable to get the bariatric multi-vitamins, then make sure you have a good quality regular multi-vitamin and take 2 the for the first year post-surgery.

Vitamin D

Preoperative Vitamin D deficiency is very common so a Vitamin D3 supplement with at least 3,000 – 6,000 IU a day is recommended after the surgery.  Routine assessment of this vitamin should be considered as it’s deficiency may lead to bone loss.


Take a calcium or calcium citrate chew daily, 1200 – 1500 mg for sleeve, mini bypass or RNY bypass patients and 1800 – 2400 mg for SADI-S. Bone loss due to calcium deficiency can be a risk after all types of bariatric surgery. Remember that if you take a great bariatric multi-vitamin, check the label because it may already contain some calcium. Take the calcium in three separate smaller doses of 500 mg throughout the day for better absorption.

B-12 Sublingual Tablets

Take a 500mcg to 1000mcg B12 sublingual tablet daily. Be sure to purchase sublingual tablets and allow them to melt under your tongue. This is important because with a gastric sleeve procedure, you will not metabolize the B12 in the stomach the same as you did before surgery. Stomach acid helps to release B12 as well as Intrinsic Factor (produced by the stomach and is necessary for the absorption of B12 in the small intestine). If you prefer, you can get injections of B12 from your provider at home.

You also have the option of purchasing high quality B12 injections at the pharmacy in Tijuana for a very reasonable price, but please make sure that you have someone that is properly trained at preparing the injection site and can administer the injections safely. For the first three weeks after surgery, please use one injectable B12 prefilled syringe per month until you have your 3-month lab work done.


Iron (18mg. to 60mg) or FeSo4 may need to be taken. Low iron can be an issue after weight loss surgery, especially if you are or were anemic before surgery or have a bypass. Iron is better absorbed with vitamin C. Please do not take iron at the same time as your calcium because it decreases the amount of iron absorbed by the body. We encourage all patients to follow their doctor’s instructions, but you may wait until you have your 3-month post-operative lab work completed to see if it is necessary to take extra iron.

There are a couple types of iron: heme-iron and non-heme iron. Heme-iron is better absorbed by our bodies. Examples of heme-iron are meat, fish, and poultry. Examples of non-heme iron are plants, cereals, and lentils.

Note: Interactions with Minerals
Levothyroxine interacts with minerals such as iron, calcium, and magnesium, which lowers the activity of thyroid medicine. Many antacids contain magnesium and aluminum, so avoid taking them when you are on the thyroid supplement levothyroxine. If you take iron-containing products, such as multi-vitamins with iron, make sure you do so at least two hours before or after you take your thyroid medication. If you take calcium, make sure there is at least four hours between taking the two kinds of medications.

Health Disclaimer: This website provides information about health and related subjects. The information provided on this site, or in any linked materials, is for informational purposes only and is not a substitue for receiving direct professional medical expertise and / or treatment. If you think you have a medical emergency, call your doctor or emergency services immediately. 

Recipe & Food Disclaimer: We are not responsible for any outcome of any recipe you try from the website. Take care when using cookware including knives and other sharp or hot objects. Review all ingredients prior to ingesting to ensure you are not allergic to anything in the recipes. We do not provide any assurances or accept liability in regards to quality, nutritional value or safety when using the recipes provided on this site. 

Check your BMI Today!

See if you qualify for Weight Loss Surgery!

Take your first step by telling us a little about yourself. A coordinator will be in touch to discuss your weight loss surgery options.
All form fields required.

The following information is for calculating your Body Mass Index (BMI) to determine which surgery you qualify for.

Contacting you by phone is the fastest way to discuss your qualifications and next steps. Please make sure your phone number is accurate.

Knowing more about where you've been and want to be will allow us to have a better conversation with you about reaching your goals.