"...不知谁知道有哪种天然蛋白质能直接从肠道吸收还能发挥生理作用的...."

Isn't this our topic?

"这是在替我的文章有关分泌型IgA部分提供文献吗?"

If you like to consider it that way, fine. I am not totally against all of your endeavor. I know you hate "advices" about your personality and I am not trying to give your any of that kind of thing. However, at professional level I have to point out that you are actually shooting yourself on the foot. In the business of science you need to tolerate dissendensy and trerat people who have opinion different from yours with respect. Please take note if you think my words make sense.

The transport of macromolecules through the intestinal mucosa is still under hot research. It is really too early to say it is totally impossible. The abstract I showed you gives a clue about a mechanism, and you should understand its value. I respect your effort to worn people about the potential danger of all those irresponsible comercial propaganda. But if you want talk about science, do it as should a real scientist.

BTW, I also have knowledge about research work showing therapeutic effect of orally administered enzyme in protecting intestinal tissue against inflammatory injury. The enzyme, or at least some fragments, was localized in the epithelial cells in the small intestine after its ingestion. If you want details I may provide the reference. I actually want to see you write something of scientific value. However, if you still believe I am here to "摆谱"(sincerely I hate that) or make trouble for you, or simeply be "弱智", I surely could cut any further communication hereon, since it might be more convenient for both of us.