These B-2 tabs are a life changer for me. I used to wake up every day with a severe headache or migraine. I started taking B-2(Riboflavin) 250mg twice a day and like a miracle no more morning headaches. If I stop for a few days the headaches come right back

In August 3012, due to an increasing number of migraines that also increased in duration & intensity over 3 years I went to a neurologist who - because of sensitity to medications - has had me try a natural approach utilizing supplements. She has me taking the B2 250mg, 400mg Magnesium & Butterbur 75mg. The B2 is easy to take & the combination of the above my migraines have become almost non-existant. I highly suggest your consulting a doctor & researching before using any medications or supplements.

I take 500 mg once a day (prescribed by my dr) for migraine prevention)and this is a great item to have rather than taking 5- 100mg tablets. So far, migraines are managed along with the rest of my program. :)

I also take 500mg B2 for migraines, and most health food stores only carry 50 - 100mg. I prefer only taking 2 pills, so glad Amazon carries it.

I have been looking for B-2 tablets in larger size than 100mg and these just fill the bill. I take 500 mg per day for migraines and these are just the right size for 1 in the mornings and another after dinner. They have done their job and no migraines, THANKS.

Not that calcium is necessarily bad, but NOWHERE in the product description is it mentioned that this B-2 supplement also contains calcium, something that can interrupt and negate the absorption of certain medications and aggravate other conditions. I need the B-2 for migraines, like many other commenters, but cannot take calcium, so I was horribly disappointed when my package arrived containing extra, unexpected ingredients. At very least the product description should inform customers that their B-2 supplement also contains calcium even if they don't list all the ingredients. If the product description was accurate, I definitely would not have wasted nearly $13 on something that I cannot use. UPDATE: Amazon customer service quickly ameliorated the issue of being stuck with a product I cannot use, but be aware this supplement contains calcium in addition to riboflavin.