Would you clarify about that word "immunity “…?
Immunity from what… ?
If this immunity booster are “functional ingredients” that you add to your dough ,that when consumed as staple (bread) will improve your health making you less susceptible to catching disease, or getting sick…,? It will never happen as it’s a MYTH .
Unfortunately there are unscrupulous people that exploits the general public gullibility by marketing " snake oil” medicine for a profit. I hope you are not one of these miscreants.
You need more than fancy ingredients to have "good immunity "in yourself.
Cultivating effective immunity is a comprehensive program .Its a combination of healthy lifestyle, healthy food habits.as well positive mental attitude. among them.
This is beyond the realm of Food R&D and no drug or food additives could provide that; you have to LIVE that life where you are aware of those positive attributes that led you to better health.
Even if you regularly take loads of vitamins, minerals and other functional ingredients, if you abuse your life and body ,you will never get that vaunted immunity…
That’s the reality…