I am still kind of adjusting the dosage and keeping track of how it affects him. I believe most people with OCD take up to 18 grams. He was taking 18 but yesterday he did fine on 12. Going to try 12 again today and see how he does. It just depends on the person. I have also read about possible problems with Bipolar but they just aren't certain. I would also do more searches on Inositol and Bipolar if I were you. My friend has it and we gradually tired it with him starting at low dosage for a week and gradually increase week by week, keeping a close eye on how he feels. He now takes 12 grams a day. 2 teaspoons in the morning and 2 at night and has seen great improvement. Don't ever take a lot at once if you're not use to it because you get intestinal cramps and diarrhea.
1 tsp.=3 grams
You could start with 1 tsp twice a day for a week. (((If you get intestinal cramps/diarrhea then lower it to maybe 1/2 tsp twice a day for a week.)))
2nd week- 1 tsp 3 times a day (I'd probably do this for 2 weeks)
4th week- 2 tsp 3 times a day (This is 18 grams)
Everyone is different. You might feel fine with just the first week dosage. Just adjust it to whats best for you. Some people notice improvement right away, some people it takes longer. They say you should stick with it for at least 6 weeks (I thinks it was 6) to see results. I'll have to look that up. If you have a doctor you might want to check with him/her first.

Hope this helps. Oh and don't buy bulk to save money. We tried that and my son noticed a difference right away. It's not good quality. I would tell you what we get but I don't know if I'm allowed to do that on this forum. They might think I'm trying to sell a certain brand or something.

Blessings!