Il dosaggio ottimale di vitamina B12 per adulti

100 Risposte a “Il dosaggio ottimale di vitamina B12 per adulti”

1. My new recommendations are updated on my Optimum Nutrition Recommendations page: https://nutritionfacts.org/2011/09/12/dr-gregers-2011-optimum-nutrition-recommendations/

2. Can someone explain why the recommended frequency always seems to be either daily or once weekly? Is that just random or does it matter in terms of absorption? Like is 1000 mcg twice a week just as fine?

3. You're not talking about the active & passive way to absorb B12 any reason therefor? As far as I know Niko Rittenau mentioned that to remain normal levels 2×10 mykrogramm per day with at least 4 hours in between would already be optimal

4. Thank you for this very valuable info!

5. Genius!

6. I got tested and my levels of B12 level was 400, but I wanted it to be closer to 800. Is 800 not the ideal level ?

7. Should the government put B12 in the water like flouride?

8. Haha I was taking about 1250mcg a day. The suggested serving was actually 2500mcg per day. I guess I can cut back a little. I thought I could just rely on fortified milk but it doesn't seem it was cutting it. I was getting brain fog and had low energy. Felt like passing out. I'm not sure if it was related though.

9. Thank you. I am having a question though. One of your earlier statements concerning those of us over 65 needing to take extra B12, how does the new recommendation fit in for us long term vegans over 65??

10. what about the lungcancer b12 study?

11. The famous B12.. the only suplement i take as a vegan <3

12. Whats the best one to buy

13. A friend of mine whose father had Covid-19 took a Vitamin B12 complex injection and he came right.

14. Great insight, thanks!

15. for main public info offered in your videos are way too complex… not easy to digest

16. 💗💗💗

17. I couldn't follow this very well… I have a 1000 mcg of cyanocobalamin daily. Is that too much or too little?

18. Is it healthier to sit down to eat or to eat while standing?

19. But the utilitization of cyano and methyl b12 is diffrent. 250 what? Cyano?

    My current knowledge still suggest either 250cyano or 500methyl a day. Or 1500cyano and 2000methyl a week

20. I have been taking 1000mcg cyanocobalamin per day!

21. PLEASE HELP ME! My supplements have 2.4 mcg of B12 and it says it represents 100% of our needs. Can you help me understand? How on Earth could I reach 50mcg? I don't understand anything… Thank you so much

22. Can you make a video covering the new study showing a ketogenic diet can reverse heart disease?

23. 50mcg daily or 2000mcg weekly for sublingual? How about capsules?

24. I'm currently doing 3,000 mcb weekly, 1k on Mon, Wed and Fri….but thinking I should go to 2,0000 mcg on Mon & Thursday.

25. What Mr. Greger does not explain is that small daily doses of B12 are much better absorbed than a weekly large dose. Google the study at 5:08. This is why a daily dose of 50 mcg is as effective as a singly weekly dose of 2000 mcg. The numbers did not add up, and this is why.

26. What does a homocysteine level of minus -3.00 mean if normal reading is supposed to be 0.10 to 13.00?

27. but Dr Greger.. what if i dont want to take supplements?

28. what if i put 1000mcg methylcobalamin in a couple gallons of water and drink it over time would that be o more efficient way of taking less and getting more

29. Are you aware that your white background fullscreen graphics are not 100%
    opaque? Your shadowy arm movements are still discernible.

30. What B12 supplement brands are y'all using?

31. Is there a problem to supplement 250mcg a day? Is It dangerous?

32. Can you do the same for DHA and EPA omega-3 fats, meaning considering the conversion rate is it enough to eat certain amount of flax/chia/etc. or to get enough DHA can be done via supplementation only?

33. 💚💚💚

34. A bucket full of day should do the trick. I load of bollocks. Grandma lived to 98. She didn't supplement anything. And I know you will come back to me and say anecdotal evidence doesn't Count. Well that is my evidence and it does count.

35. I learned about B-12 from this nurse's experience https://www.youtube.com/watch?v=HFj07-H-1No

36. Thank you, Dr . Greger! Could you please recommend how often I should have B12 injections and what dosage? I cannot find good quality B12 supplements. Thank you in advance.

37. Any thoughts on high b12 levels and increased cancer-risk studies?

38. So if I take 1000 twice a week that should be fine I assume?

39. Since my uncle gets itchy spots scarring him after taking cobalamin and excluding other food triggers the fortified nutritional yeast has helped but he gets Sneezy after yeast hope it's just coincidence. He is whole food plant based hope he'll be ok

40. IF daily dose is 2.4 mg why should we take 2.400 mcg ONCE A WEEK? it should be 17.000 mcg a week , right?

41. Dr. Dre probably had an aneurysm because he doesn't eat meat and wasn't supplementing his diet with B12. Family, please, take your B12 if on plant based diet.

42. Thank you Dr Greger!
    I only didn't understand the daily intake necessary deppending in one previous defficiency

43. I would love to see a video on the proposed upper limit of B-12 and dangers of taking too much. I've been taking a daily dose of 500ug, and the level of B-12 in my blood was way too high (well above the upper range). My doctor actually recommended I stop taking it for awhile and lower my dose. I'm vegan and this is the only reliable source of B-12 I consume.

44. This is so scary not knowing what the long-term affects would be until I’m older! Since all the supplements are in the thousands I guess it would make the most sense to go the once a week route.

45. Hmmmm, just found the yeast video he made. Might go that route instead.

46. Maybe u should start eating meat and the carnivore diet instead of jumping all the time during the entire video and maybe ur eyes would get normal too so u wont need glasses anymore DOC 😀 How about that ?

47. What’s that one spray if b12 supplement per week?
    Dr g – vested interests?
    Coz I’m starting to find out supplements can be harmful for health, it sucks that vegans are targeted & fall for it

48. Does anyone know where to get a vitamin b12 supplement with a low enough dose for a young child?

49. Now I am confused. My multi-vitamin says it contains 6 mcg in each pill which equals 250% of RDA. He recommends 250mcg a day. I think the measurement units are the same so why the massive difference? Anyone?

50. 50mcg/day or 2000mcg/week

51. What is a correct dose of B12 for kids between 7-15?

52. Why is b12 cyanocobalimum strongly recommended when it has cyanide in the ingredients.

53. At 5:28 it reads take the supplement on an empty stomach though on my supplement tablets bottle it says take with food! Which is best???

54. should i delay brushing my teeth after using a sublingual b12 supplement? thanks.

55. The units are confusing me. Sometimes the recommendation is referred to in single digits and other times it is in thousands. Which is it?

56. I’m so confused and all this doesn’t even apply to me a >60 average female.
    I’m sure I’m not the only one.
    Please, how much of what should I take per day?

57. Long story short…
    "I use the word maybe so many times and there are so many conflicting reports my statements are a shot in the dark."

58. A vial of 9ug costs me one Swiss Franc. So 50 would cost me nearly six francs a day. I simply can`t afford 2000 francs a year for a supplement.

59. Best Vit B12 Methycobalamin 5000.MCG or Dibencozide B12
    as.co-enzymated B12

60. It is quite interesting that cyanocobalamin is listed in the government's toxicity database as generally known or suspected to cause serious health problems. Cyanocobalamin is also on the list of toxins that the EPA must regulate, set a standard for, and try to reduce or eliminate.
    Methylcobalamin is the preferred choice.

61. 5:29 He gives the answer here. You’re welcome.

62. I became vegan and went whole-food plant based 15 months ago. I've lost nearly 80 lbs. I went in to have my homocysteine levels checked today and the result was 15. I'm told this is the high end of normal and I need to reduce it. My Vit B12 level was normal. What should I do? I run a 10k everyday. I'm only 15 lbs overweight (still losing weight daily), and I eat a ton of beans and leafy vegetables. My folate levels were >20 (normal) too. Help me please.

63. Why does Dr. Greger (and other WFPB docs) say supplements are trash, and then occasionally talk about the importance of taking supplements?

64. Thanks for sharing. Finally someone, speaking properly, and quoting information properly, and titling the video right, and answering the main question .

65. What about people over 70? I currently take 1000 much daily as per your recommendation:I'm 73 and vegan.

66. Dr Esselstyn takes a 1000 mcg a day. And this guy is sharp for his age!

67. So is fake the claim " I became sick after being vegan"

68. 2.4 of B12 will absorbs 1 microgram. If you want to absorbs 3.5 micrograms 200 0r 225 should be taken. 50 a day or 2.000 a week

69. How much is 100mg to 2.4?????? In pill form??

70. My B12 is 1000mcg

71. I love how you are a true scientist and a doctor. Using most recent and legit scientific literacy, research, and data to UPDATE the recommend dose instead of clinging stubbornly to old scientific data like so many other doctors. Mad respect to you sir!

72. Very informative! Thank you for all your hard work <3

73. I'm a little confused. I have one supplement that says 1000 mcg that I take occasionally. Another daily multi says 15 mg. It SAYS the 15 mg is 882%. Is that correct? Is it enough? The 1000 mcg says it is almost 17,000%.

74. where can i find 50mcg b12 on amazon?? they are always like 250 or 500

75. Gracias por los subtítulos en español. Saludos desde México

76. Even this video has me confused. I'm a 62 yo Male vegan. I was taking 1,000 mcg 1 daily in a supplement. When I reduced to 2,000 mcg weekly I was very fatigued and went back to 1,000 mcg daily. Problem solved. Additional study shows you can take too much B-12 and the excess isn't simply eliminated. Yup, every now and again I'll have fortified nutritional yeast as a flavoring and I love a Miramite sandwich. What's a boy to do?

77. No living creature ever took any vitamins or supplements. 102 year old Dr. Fred Kummerow Ph.D in food chemistry and Professor of food science never took any vitamins or supplements for evidence based reasons which were based on his 450 published scientific food research reports. He said that unless you have a bad diet or a specific medical condition then those unregulated vitamins and supplements can do more harm than good. The ones they put in fortified foods are a safer option only if needed.

78. What the hell is a micrograms IU vs mg. How doe we know when shopping?

79. my pills bring 1000 mcg. Does it work to divide them into 10 parts and take 1 each day?🤔 someone knows?. Thanks

80. I am curious: will chewing a pill work to mix my saliva with the b12?

81. what is a good b12 supplement?

82. Thanks for the Video – Very Informative

83. The Nature's Bounty (cyanocobalamin) bottle says 1000mcg/day. Isn't that too much?

84. damn this is the most confusing video from Greger/

85. I have been taking 2500mcg per day lol

86. ok is that for people over 50??? i didn't catch that part????

87. ❤

88. Gracias doctor., por sus recomendaciones para tomar vitaminas B12 su video esta muy bien detallado.
    Porfabor recomiendeme algo para fortalecer mi cerebro no estoy reteniendo información en mi cerebro .
    Gracias.
    Saludos desde tijuana b.c México
    DIOS LE BENDIGA .

89. Slow down! Vitamins B12, choline, and folate can partly accommodate a deficiency of each other right? They all address elevated homocysteine for instance. So taking more B12 could mask a folate or choline deficiency right?

90. In my country Cyanocobalamin is not available. My b12 test shows the level less than 159pg/mL. What should be my dosage (of Methylcobalamin) and for what duration?

91. What a confusing way to explain! We are
    Not doctors or I’m not. I couldn’t get through to the end. Too much info that told me jack

92. And without intrinsic factor the B12 doesn't get absorbed.

93. no. Ya. No. Sirvio. Estamos. En. Mexico

94. Hi! I can't find B12 in 50 nor 2000 mcg dosages anywhere in my area. I can only find cyanocobalamin in a 250mcg dosage. Can somebody please help me figure out how often I should supplement per week with this dose? I didn't quite understand the formula shared in the video…

    edit: If I did the calculation right, a 250mcg dose should give me an uptake of 8.6 mcg of B12 in a day. Would taking this much from a supplement, plus eating some fortified foods on top of that be too much? In that case, should I supplement 250mcg every other day and have my fortified foods daily?

95. 👍👍

96. Thank God I saw this!!! I hadn’t yet, but was thinking the 2000mcg dose was an every day does. Holy Crap! Thank you!!!!

97. We need to know what supplements and what vitamin companies do not cheat their customers. Since the FDA does not regulate vitamins at least, the vita companies can just put what ever they want in them. You might get ZERO of the vitamin in question, if any in the bottle you purchased. And it is hard, if not impossible to get B12 "naturally" without resulting to eating meat or dairy.

98. 2:10 🙌👌

99. so about the 2000 mcg per week, does that mean the 2000 mcg must be taken all at once or can I instead take a 1000 mcg tablet TWICE a week instead?

100. Is 1000 mcg vitamin b12 tablet daily safe?

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