B2-400

Seems good

Excellent product and great seller. Quick shipping too

Great seller great product. Highly absorbable

There are not many choices if you need to specifically supplement for B2 so I was very happy to find Bio-Tech B2-400 here on amazon. The price is reasonable, the dosage is good. While there is B2 in almost all B Vitamin Complex supplements it is generally far too low if someone is actually deficient for some reason. I was already taking a very good B Complex when my blood work came back showing a B2 deficiency. I also appreciate the fact that there are not a lot of fillers in these capsules. I could do without the silica but many supplements have a lot more "junk" in them than these. I hadn't heard of Bio-Tech before but these have definitely done the trick. After using one bottle at the suggested dose my levels when re-tested were above normal. I now am only taking this twice per week & will keep checking my B2 count periodically. Excellent!

I do think from my experience this is actually riboflavin at an effective dose. I have hormonal headaches and was hoping this would help - not sure if it did - I still had a few hard days, but less of them. However, the unexpected side effects of day time fatigue and then insomnia at night are keeping me off the 400 mg all at once. (I originally tried 200 mg 2x daily, to the 400 mg in the morning). I am certain the effect was from the riboflavin - take no prescription meds, only a multi, glucosamine, magnesium, and D3. (No reg OTC and 1 cup coffee daily). The sleep effects began to reverse within 48 hours of quitting. Anyways, if you suffer from migraines I think this is worth trying, but be aware if you experience sleep issues.

I have taken this supplement (per my doctor’s instructions) for years and it works exactly as advertised.

My wife's physician prescribed Riboflavin 400 mg daily for migraine prevention. Since I also suffer from constant migraines, I decided to give it a try. We chose this brand since it was the highest rated in Amazon. I have been taking this for about a month and my migraine frequency has decreased by about 70-80%. This is great! I am sure that other brands of Riboflavin could work the same but since this one is working very well, I will just stock to it. The other good thing about this brand is that it comes as 400 mg capsules and many other brands sold in stores like Whole Foods and pharmacies, only come in 100 mg which is not good since the prescribed amount is 400 mg and you would have to take 4 capsules of those brands. So, I am very happy with the results.

The product works for me and I feel this is a higher grade than a lot out on the market.