per my understand, more demand, more supply, so you should have enough milk for your twin, and since they are only 1 month, you have to work hard to establish the milk supply for yourself.
remember to forget " formular ", and trust yourself that you have enough milk for your twin.
i believe you will be very tried since you will continously nurse them, remember to drink enough liquid, including fish soap, water, juice.
also, soya bean milk is the most efficient one for me to increase milk, it will not be too " leung " for black soya beans and add more ginger, so you have to do it yourself, or you can ask your family member or maid to help you, i drink the black soya bean milk everyday, first of you, you have to soak the black
beans overnight or at least 3 hours, then put some water with the black beans and blend it , then put them into a fish bag , and cook it with some ginger slices, for an hour, lastly, add some rock suger .