Olympus K1ngslayer was potentially the best for this (plus way more benefits), but is pretty hard to find now.
If you can’t find any, try looking for Genetian root (increases Ghrelin and seems to help with increasing hunger and empty stomach feel) and/or Atractylodes Lancea Rhizome.
If you want products that do more than just hunger Myokem’s Magnitropin contains Genetian root and Performax Massmax contains Atractylodes Lancea Rhizome.
Many also note this as a benefit of natural anabolics and Anacyclus Pyrethrum was popular for this for awhile. Olympus Labs Test1fy contains an adequate dose and extract of this.
So maybe I am wrong but I think that’s more just like the “generally natty anabolics make you more hungry” scenario, that seemed confounded by the fact it and K1ngslayer both had KME. That’s pretty much where the comparisons stop, but you know how the boards work, since KS specifically worked on hunger/digestion pathways and it shared a similar ingredient the comparisons to Vector added to this.
Maybe I am wrong, since I don’t have as much knowledge about EJ and RR, so maybe they have direct hunger boosting mechanisms, but not sure.