...ชาชงเอง น่าจะดีกับสุขภาพมากกว่า ชาซื้อ...

if only we don't put in as much sugar as in the bottled tea (6 - 12 teaspoons of sugar or cornstarch syrup per 1 litre).

The good doctor would recommend 0 sugar in tea but a few drops of lemon juice per cup ;-)