Guys, this bro science is killing me.
I took this question awhile back to my friend who's a research chemist.
Glass is used in laboratories(one reason anyways), because its surface adhesion is so low, that it can be calculated.
So I gave him the amount of grapefruit juice, and the appropriate dosages of lgd, rad, osta gw.
Using those dosages, the dilution ratio is very high in a small glass of grapefruit juice. Any residual left is so low
at that dilution rate, that the method you use to measure out dosages has a higher impact than any residual left in a glass.
Thats real science speaking here