High in carbohydrates? All the plant and nut milks I have drank contain more fat and protein than carbs all together. More sugar? don’t think so. They use sweeteners or there’s unsweetened ones. 300ml of milk contains 15g of sugar, 300ml of cashew milk contains 6g of sugar. While milk will always boast more protein, there is no need to try make plant milk look fearful for health.