Can We Actually Absorb Vitamin B12 Supplements? Dr Michael Greger

Can We Actually Absorb Vitamin B12 Supplements? Dr Michael Greger

January 30, 2020 33 By William Morgan


Vitamin B12 plays a key role in the normal functioning of the brain and nervous system and the formation of red blood cells It’s involved in the metabolism of every cell of the human body especially affecting Dna synthesis, fatty acid, and amino acid metabolism So having good levels of B12 is critically important Due to the stomach’s high acid content Vitamin B12 can’t survive the journey through our stomach without something called Intrinsic Factor Intrinsic Factor binds to B12 when it reaches the stomach so the B12 can successfully reach our small intestine. Once in the small intestine, Intrinsic Factor dissolves releasing B12 to bind with another protein called Trans cobalamin 2 – for transit through the epithelial cells into the bloodstream and onto your liver Cells in the stomach called Parietal cells make the Intrinsic Factor however in some people these cells can be damaged which results in Intrinsic Factor not being produced and Consequently B12 not being able to be absorbed Alcoholism, Ulcerative Gastritis, H Pylori and Gastric Bypass Surgery are just a few conditions that can cause Parietal cell death Whilst it’s very rare that someone is unable to produce enough intrinsic factor there are ways you can still get enough Vitamin B12 The first is through high dose sublingual B12 supplements The second is through B12 injections and then thirdly and maybe most effective if through something called Intranasal Absorption If you want to read more about the effectiveness of B12 absorption through your nose, I will include a link below However some health educators believe that Vitamin B12 Supplements are not well absorbed or utilized by anyone, whether they have intrinsic factor issues or not I recently heard Dr. Michael Greger addressing this very issue So let’s hear what he had to say. The link to the full interview will be in the description below So that’s why we need massive doses. So 2,000 micrograms is 2,000 times the amount that you need actually every day and so 1% gets through the intestine just through mass action, receptor independent so absolutely! You need the intrinsic factor you need to have a whole exotic system receptor to actually take in the you know 2.6 you need a day. But you can saturate those receptors very quickly. Wait four to six hours to get more and you take these massive doses And it’s water side also you really can’t get too much then about 1% actually does get through the intestine just mass action Thank you so much for watching. If you liked the video Please give it a thumbs up, leave a comment below, and subscribe for more upcoming videos If you want to see what I’m eating follow me on Instagram @801010 in London