Can i take 3000 mcg of b12

I have, after months of searching on the internet and in stores, not yet found a B vitamin supplement that is not grossly over strong. All appear to be approved by CL. What is going on?? Hi Nancy - The B vitamins that are Approved in our Review passed all of our tests of quality contained their claimed amounts of ingredients, disintegrated properly, etc.

However, as you noted, and as we state in our Review, most B vitamin supplements tend to contain amounts far exceeding daily requirements, and some even exceed upper tolerable intake levels ULs. To make this more clear, we've also noted in the results table, in green, how the amounts of individual B vitamins in each product compare to daily requirements.

In July my husband was diagnosed with Early Onset Alzheimer's. In August he started monthly B12 injections, since his vitamin B12 tested on the low end. I do not see any information about B12 injections, so I am wondering if having these injections gives too much B12 at one time? I recently started talking a mcg dose of B At the time I was on omeprazole Prilosec maintenance for a reflux condition. After about five days, I started to to get itching on my lower arms and neck.

This occurred mostly in the evening. By day 6 the itching was very intense read tear-my-skin-off itching. As I usually do, I considered what had changed in my diet and looked for possible side effects of B Sure enough my situation was described and 50 mg of diphenhydramine was suggested to obtain relief.

It worked in less than 30 minutes. I have a rare disease associated with frequent RAS recurrent aphthous stomatitis and read B12 can help with that. Do you know about this and how much B12 if any would you recommend? Male Age 78, reasonably good health, quite active, take a number of vitamins. I get very tired in the early afternoon Taking 5, B sublingual MethylCobuline about 10 am makes a huge difference I can remain active into the evening.

Normal sleep pattern is 9 pm to 5 am. Stopped B and tiredness returned Wife 76 has same results. I found that mg daily Niagen similar to B3 quite effective in providing more energy. Hi David - Thank you for sharing your experience. Can you add detail to the "study which showed that a high-dose B complex supplement with 1, mcg of B hurt, rather than helped, people with diabetes and advanced kidney disease"?

What kind of hurt, what kind of diabetes, and how was B identified as the culprit? Hi Dr. Martin - We've now added information in the answer above to address your questions. Yes, they had diabetes either type 1 or type 2 as well as kidney disease diabetic nephropathy. It's very irritating for you to post expressions like ". The above is better expressed as ". However, the alternate use of "mcg" is still recommended when communicating medical information in the U. I also take a prescription thyroid that is labeled as "MG".

Not everyone who posts here is an M. Yeah, but we are used to using mcg for micrograms. Using "u" is confusing to most people; except, lab workers. I strongly support Gerhardt's suggestion. To suggest it takes scientific knowledge to understand basic symbols which alternately simplify the contents at a glance is a bit insulting to the consumer intelligence.

Additionally, when listed ingredients and nutritional amounts are shrunk down on labels to the point of requiring a magnifying glass to read without straining, It further underscores the difficult hurdles most consumers encounter in an industry that is poorly monitored, overrun with production standards and methods which threaten human health.

Although I'm getting off topic a bit, I just want to conclude the very reason I subscribed to ConsumerLabs is to obtain information that is not adequately made available to the public, and many of us are sure to increase the level of concerns in this forum, given the exposure of so many harmful substances we experience daily. Thank you for your kind words, Henry. I plan on initiating the use of vitamin B mainly because I am 79 years old and recently experienced some memory and energy problems.

They have provided excellent results. However, I'm hoping for additional hely from the B My problem is dosage. Recommended dosages are all over the place. Statements in your current review of B 12 do not recommend that high of a dosage.

What is the correct dosage? Unless you are severely deficient, there is no good reason to take a dose of 5, mcg, which is about 2, times the daily requirement, and, as we have noted, there are potential risks with getting too much B The Review includes our Top Pick for a B12 supplement.

So, I take one 5, methylcobalamin sublingually about once a week. Hi Bruce - Thank you for sharing your experience using this form of B I took B because of all the Hype, turns out I was normal and in a blood test, my B was high and the doctor told me to quit taking it, it was dangerous to take too much! Years ago over 40 years ago , my family doctor did a house call when my ex-wife was really sick. He gave her and injection of B and it really perked her up. He was ready to put her in the hospital but didn't need to after the injection.

I have taken oral B for many years. I am unaware of any negative side effects. Have taken as much as 5, mcg per say but take about mcg now. Hi John - Thank you for sharing your experience. From your description it sounds like your ex-wife might have had a B deficiency.

My doctor administered a B injection for my daughter and she had severe adverse neurological reaction. It has been over 1 yr and she still has evidence of side effects. We have been told B12 toxicity is uncommon. Has anyone experienced such side effects? My doctor gave me Vitamin B! I did my own research and discovered it could cause such a reaction in those who are histamine sensitive.

I have been following a strict low histamine diet, and at least am somewhat functional, but lost 7 months of my life to anxiety, depression, and what I can only call heebie-jeebies. You must find a naturopath or other practitioner who understands this relatively newly isolated condition. Believe me, it has been hell.

Yes, I believe that is somewhat similar to my experience from taking the B12, 1, mcg daily. Too bad the dr. A LOT of people have this issue and don't know about it! You, and the woman above whose daughter had bad reactions to B, may have methylation issues that sometimes make one intolerant of methyl-B It made an amazing difference for me. I use the ones from Seeking Health. Hope this helps. Hi Dale - Thank you for sharing your experience with these forms of B My ex-husband told me he received vitamin B12 injections from his doctor, and afterwards suffered extreme itching.

I recommended the sublingual B12 tablets instead of the injections. The large amount received at one time could cause itching. I took B12 1,mcg for six months.

Didn't feel any different. Went off it and have been suffering from speeding heart and palpitations, problems I never had before the drug. Hello- I'd just add a friendly reminder that correlation doesn't guarantee causation. I recognize that your heart symptoms could be connected to going off the supplement, but it could also be coincidence, meaning there is something else causing the new problems.

I hope you'll get your symptoms checked by a doctor soon. Respectfully- RB. I have taken B12 supplements and also some shots now and then in the past without any discernable effect. Weakness and fatigue are common symptoms of vitamin B12 deficiency. They occur because your body doesn't have enough vitamin B12 to make red blood cells, which transport oxygen throughout your body.

As a result, you are unable to efficiently transport oxygen to your body's cells, making you feel tired and weak.

How much vitamin b12 should a person over 65 take? Experts have estimated that a Western diet contains micrograms of vitamin B12, and a multivitamin often contains micrograms. How much b12 is in a glass of milk? The daily consumption of milk products can therefore contribute to the recommended intake of vitamin B What does b12 help with?

Vitamin B12 is a nutrient that helps keep the body's nerve and blood cells healthy and helps make DNA, the genetic material in all cells.

Vitamin B12 also helps prevent a type of anemia called megaloblastic anemia that makes people tired and weak. When should you take vitamin b12? These B vitamins can be taken at the same time.

In fact, companies offer vitamin complexes, which are combinations of the daily amount of each of the 8 B vitamin types. The best time of day to take a B vitamin is after waking up. Taking B vitamins on an empty stomach is supposed to help with absorption of the vitamin.

Does high b12 mean cancer? High levels of B12 in the blood are linked to 15 per cent increased risk of lung cancer, according to a major international study. That's one more reason to stop buying supplements and eat a healthy, varied diet, researchers say. How much is a AO Smith? The procedure for vitamin B12 injections is very similar. Naturopaths tend to recommend a regular intake of small doses that corresponds to the natural intake of B12 and ensures an even supply, which they believe may be easier for the body to cope with than intermittent flooding with large doses.

Vitamin B12 is considered harmless. Nevertheless, it should be noted that the body is a sensitive system; an excessive intake of micronutrients over time may disturb the nutrient balance, which can lead to very negative effects. A high dosage of vitamin B12 for prophylaxis is probably pointless for most people, as the vitamin is excreted through the urine anyway. When is B12 Considered to be High Dose? Increased Requirement There are different factors which increase the vitamin B12 requirement.

Vitamin B12 and Diseases Today, high-dose vitamin B12 is used in the treatment of various diseases. These include in particular: Anaemia pernicious anaemia Mental illnesses depression, psychosis, schizophrenia etc.