As I said before...
there still is:
Seems there are 7 easy to point out health benefits... may help fight (colon) cancer; aid in digestion; helps secrete more hydrochloric acid (necessary for digesting eg. proteins); may slow down ageing (inhibits the end products of protein glycation, which speed up aging - I LOOOOVE black pepper ;); may improve dental health by fighting tooth decay and providing quick relief from a toothache; may help skin conditions (Piperine has shown to be effective against vitiligo, a skin disease that causes areas of the skin to lose their pigmentation); may help with weight loss (piperine battles fat by blocking the formation of new fat cells); may be an anti-inflammatory.
Of course "they" HAVE TO put the "mays" as...
...with these sort of natural wonders, which often work gently and slowly over long periods of time, we do not have enough data to be certain of anything, yet hundreds and sometimes thousands of years of traditional use seem to be convincing enough (for me at least).
The issue is that often, that without a proper transfer of knowledge, we do not have the whole picture and might be unaware of the side effects. And EVERYTHING has side effects. As
NOTHING IS JUST GOOD OR BAD!