Yes, coconut milk is low histamine. However some people still have reactions to it, because coconut is also a rich source of other biogenic amines, to which some people with histamine intolerance have a sensitivity. Always try plain fresh coconut before trying coconut milk, and be wary of additives and preservatives in commercial coconut milks. Carrageenan is a common inflammatory thickener added to coconut milks, and it should be avoided. Additionally, avoid flavorings or sweeteners, as both of these can be inflammatory in larger quantities.