Hi, I got B12 deficiencies after gastric bypass surgery. Is it necessary to take B12, my doctor recommend Eligen B12 any guys know about this?

After RNY surgery, you are required to take many vitamins for the rest of your life. This is because you body no longer synthesizes vitamins from food. That part of your stomach has been cut away, so this daily requirement is extremely important. 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.

The directions I received after surgery was:

Three Flintstone complete chewable multivitamins daily.

Additional 65 milligrams elemental iron daily for menstruating women.

1500 to 1800 milligrams calcium citrate daily [this can be tricky because the dosage rate is per 2 capsules - therefore this can mean around 5-8 capsules per day depending on the size (petite or regular)].

500 to 1000 micrograms sublingual B12 daily or 1000 microgram injection once monthly.

100 milligrams Thiamine (vitamin B1) daily for the first year and then weekly thereafter.