Short version: Is about 3 g nutmeg too much for a single meal? Long version: This evening, I prepared 2 big dishes of spinach lasagna. I like to eat rather spicy, but I overdid it a bit this time, putting about 50-60 g (bought ground). I usually cook big quantities like today, and freeze it to eat it during the following weeks. Normally, I would do about 20-24 portions out of those 2 dishes Taste wise, it's still good (a bit less nutmeg would probably have been optimal). However, I realized afterwards that the amount of nutmeg might start to be unhealthy (about 2.5-3 g per portion). Is it still safe to eat my lasagna? If so, should I make sure not to eat it too often (for example: max once per day, or per X days)? Or should I in addition do smaller portions (and just plan to have a starter and desert to get enough for a full meal)? Or should I trash the whole thing? For now, what I found was mainly information that it starts to get toxic around 5g or 10g. For now, the only "scientific" study I found is not giving much details on doses (focusing on symptoms), but report symptoms for 10 spoonfuls and for 25 g. EDIT : I ended up making it 32 portions (I did them a bit smaller than usual, I will just eat them if not very hungry or if I have some desert in addition). So it should rather be 2-2.5g per portion. I froze them, so I can easelly let some time between portions (I was going to freeze most of it anyway, as I can't possibly eat 20+ portions alone before it spoils) 
I think (pending a bit more digging through the literature) that for an acutely toxic dose you would need to be consuming something in the order of all of the nutmeg you put into your whole dish before you experienced the effects of consuming "too much" nutmeg. Death from nutmeg seems to be incredibly rare and usually accidental, though there are no shortage of people using it as a recreational drug. Nutmeg contains the psychoactive compound(s) myristicin, amongst which is myristic acid. These can result in hypertension (high blood pressure) and tachycardia (fast heart rate), as well as psychosis and a range of minor symptoms. To reach these sorts of effects you (assuming you are an adult, with resultant body mass etc.), you would need to be consuming about 30-50 g in a single session, as suggested by this case report from the British Medical Journal, which states:  Some 50 g of commercially available grated nutmeg were blended into a milkshake, the patient drinking three quarters of the amount.  