I only find Vitamin b2 in 100mg at my local GNC (zip code:10463)Bronx,NY. I need to find 400mg for my migraines.
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B2 doesn't generally come in 400mg tablets. The only time I've seen it in 400mg was some product someone did specifically for Migraine, and it's really a rip-off. The 100mg tablets are very inexpensive. When I compared the 400mg to what I pay for 100mg tablets, it would have cost me almost 4 times as much to switch to that 400mg product.
my doctor told me to buy the 100mg and take the 4 tablets to equal the 400 amount recommed for migraines