synthetically derived T products always produce unnatural results. they coerce an unnatural body behavior. If this is what you are looking for, you will not find it in natural sources. However...
I posted some below sources which have been proven over centuries to increase t-cell production.
Eurycoma Longifolia Root Powder (Longjack)
Suma Root Powder
Cordyceps Mushroom Powder
Tribulus Terrestris Powder
General studies show about 50% increase in T-cell production