Read user comments about the side effects, benefits, and effectiveness of VITAMIN B12.
«VITAMIN B12 Information

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Reviewer: Topsec, 55-64 on Treatment for less than 1 month (Consumer)
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Comment:
I take B12 for fatigue. I take 6000-10000 mcg per day (spread thruout the day). If you don't feel a difference your dosage is probably too low. No side effects and don't feel as tired in the afternoon. I also have been sleeping better at night.
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Reviewer: 45-54 Female on Treatment for 6 months to less than 1 year (Consumer)
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Reviewer: 35-44 on Treatment for less than 1 month (Consumer)
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Comment:
I took a whole tablet of B12 (1000mcg) for two days and half of it for another 2 days. I ended up with my whole left side from top to toe numb and tingling, I was dizzy, had balance issues when standing and walking, got extreme fatigue, confusion. I spent 3 days in the hospital with doctors trying to figure out what was wrong with me and as the B12 I had taken left the body during the next week, t
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Reviewer: jc, 55-64 on Treatment for 1 to 6 months (Consumer)
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I'm a 63 yo male and had been suffering from fatigue for several years. I have been taking (generic) Prilosec for many years. My wife's doctor mentioned that Prilosec reduces the ability to absorb vitimin B 12 and suggested I try a supplement. I started on Sublingual B-12 5000 mcg about a month ago and within two days noticed a huge difference... No more need for afternoon naps and I feel
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Reviewer: Vit B, 45-54 Male on Treatment for 5 to less than 10 years (Consumer)
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