Rau sống ngâm nước pha thuốc tím có bảo đảm?
Việc ngâm rau sống vào dung dịch thuốc tím (thường dùng dung dịch một phần nghìn, ngâm trong khoảng 15-20 phút) tuy có đỡ nhưng chưa phải an toàn.
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