Boleh je both, tapi depends on your situation lah, kalau metabolism you tinggi and baby demanding, maybe worth trying both dulu untuk see if it makes a difference, then taper down one kalau supply you dah stable dan cukup. Lactation milk + supplement boleh work together, tapi the honest thing is kena monitor jugak, if you dah getting engorged or production terlalu banyak, mungkin salah satu je sudah. Best move is check dengan your lactation consultant or doctor, they can assess your actual supply and whether you need both or just one based on baby's weight gain and your output, sebab setiap mum berbeza, some mums fine dengan milk je, others need the extra boost esp kalau metabolism high like yours.