I had gastric bypass surgery almost 3 years ago well it will be 3 years in june. I'm beating myself up now because I haven't been taking my supplement the way I should have been. I am on my 3rd bottle of multivitamins if that tells you how few I took these past few years. Haven't been able to tolerate protein shakes. I recently found out I'm lactose intolerant. I'm b12 deficient. Iron deficient. Pretty much deficient in everything. I haven't felt good at all lately (prob for the past year) I just haven't felt normal. A friend of my cousins recently passed away from malnutrition and not changing her lifestyle. That was my wake up call. I'm scared that I may have fibromyalgia. I have all the signs and symptoms. My advice to everyone is do exactly what the doctor tells you too. I regret being lazy stubborn and hard headed about my supplements.