I am elated to report that after taking inositol for about 2 months I do not have the big, black, depression I've had for the last 2 years! I had read about inositol for depression while researching Pyroluria and Histadelia and decided to try it. I ordered the powdered product, and began taking 1/4 teaspoon 4 times a day. After about a week I started going up on the dose until I was taking 1/2 teaspoon 3-4 times a day. That dose works out to 1200 mg 4 times a day. There was very little change at first but gradually I found that if I hadn't taked a dose that the depressive thoughts would start. After about 2 months I noticed that my mood had smoothed out so I waited about a week and cut my dose in half. That has worked just fine so far.
The powder is relatively inexpensive, and easy to take. The label says there is nothing in the powder but inositol. It is very sweet and I found I like it just fine dumped as a powder into my mouth from the measuring spoon. It would be fine to mix into anything that you drink as it has no taste except for being very sweet. I will try to remember to update if I have any changes in dose. I've never had anything for depression that didn't have really bad side effects so saying I'm very pleased would be an understatement.