Danny,

You need to keep in mind that RDA's are a minimum level to maintain a minimal health condition. They are not optimum nor are they for the needs of a recovering/struggling brain. 5000mcgs is only 5 mgs. You should have no problem taking a 5000 mcg tablet. You can beak it in half. I do that because I don't need the whole 5000 and it saves money. I'll break a months worth at a time so I can just grab a 1/2 piece.