I'm trying to supplement magnesium through my diet and although one of my favourite drinks is unsweetened cocoa powder dissolved in boiling water, too much of it gives me faint nausea and a slightly upset stomach. This has improved by moving from cheap powder to organic but the problem is still there. Chocolate in any other form (which I now avoid because I want to lose weight) gives me no problems. Any idea what causes this and whether there's anything I can do to take cocoa powder without problems? It's rich in antioxidants as well as magnesium so if it didn't make me feel ill, it would be very healthy!