A: For short visits of 3 to 4 days during peak season (November through March), we recommend booking at least four to six weeks in advance, particularly if you want to combine treatment with accommodation at Wyndham Grand Nai Harn Beach Phuket. For the Elite Regenerative Program, earlier notice is better because pharmaceutical-grade stem cell material requires advance preparation and logistics. For shorter IV drip or aesthetic packages during low season, same-week bookings are often possible, though we still recommend completing the pre-consultation questionnaire before arrival so that we can prepare your program.