Dr. Tu oral liquid adopts modern bioengineering technology, taking Bifidobacterium, Streptococcus thermophilus, Lactobacillus acidophilus, Saccharomyces cerevisiae, Bacillus subtilis and other flora as main raw materials, adding 30ml of protoplasm into 200ml of warm water, and adding appropriate amount of honey or white sugar to mix and drink, so as to restore and maintain the balance of flora in the human body and form a beneficial microbial protection barrier, thus achieving the purpose of conditioning the internal environment of the human body and playing the roles of nutrition, health preservation and balance adjustment.