i meant running them together, but im not sure if there is an upper limit on testofen as phyto-test and testopro both have testofen in it
Most people on AM seem to be reporting positive results on the recommended doses of Testofen-based products, i.e. in the range of 600-800 mg Testofen ED. If you've never tried a Testofen supp before, then that's a good range to start. But some only respond to (or prefer?) higher doses, e.g. 1200 mg ED.
As far as an upper limit goes, I don't believe there's a well-determined one (but perhaps it's mentioned in the Gencor study somewhere and I missed it?). Some people on here were experimenting with mega-doses up to 3 g ED, but I never read the outcome of that (hah).
FYI: TestoPro has 150 mg per cap and Phyto-test has 200 mg/cap, so it's straightforward to calculate the total Testofen content of the stack you create.
Since they both contain the same primary ingredient, it would seem to me that the real benefit in stacking them is to get their combined ingredients, namely Divanil, I3C, quercetin, and Bioperine from the TestoPro and the methoxyisoflavone from Phyto-test. (I guess this is obvious, but if you just want a ton of Testofen, you can take a higher dose of one of those products.) I don't know enough about these other ingredients to comment further, but if you do try this stack please write a report or PM me. I'd be very interested in hearing how it goes! Good luck.
(You might also be interested in my Testofen thread which has been active the last couple of days.)
Cheers.