Boleh minum air kosong je sebelum check gula, tu tak kira as "puasa" pun. Tapi kalau nak hasil yang paling accurate, some mums I know prefer avoid minum air banyak-banyak 30 minit sebelum prick, sebab boleh affect reading slightly, tapi honestly air plain water should be fine lah. Best to confirm dengan nurse or doctor at your clinic what exactly they want for your 4-time daily checks, ada clinics dengan specific instructions, so better to ask them directly when you go, okay?