What supplements are you referring to with oral routines?
For the penis? Standard collagen supplements. I've taken tons of those collagen beauty products to see if cellular repairs get expedited for a bit of gains. The results? The same as when I use red light therapy and the elongation method. Don't burn your money.
Found some older threads on here and read through, at least for hgh it seems the overall opinion is that it won't really help. I have no idea about the other ones you mentioned. If you know could you explain or provide more information about this or refer to a study, maybe you have experience yourself?
HGH will put your penile growth back into an uncertain growth condition. But HGH also causes oddities to grow out of control, which can lead to abnormal growths like tumors and cancers. Direct injection of HGH, definitely, that will work. So will any synthetic formulation meant for cellular growth promotion. Oral and skin application route, so far, only DMSO (a carrier agent) + XXXX will push the material directly through the skin. Just be very careful of the ratio.