DS is 10 and I'd like some opinions on whether or not there are supplements worth taking that could help improve his concentration. He's bright, eats a reasonably ok diet (but doesn't eat any fish at all), gets plenty of exercise and isn't staying up late etc. Someone suggested cod liver oil, which I'd be happy to get for him especially since he doesn't have any fish in his diet but would be interested to hear if there's any other supplements worth trying.
What has or really hasn't worked for you? Thanks