by Elio — Fungi make tox­ins (called, not sur­pris­ingly, my­co­tox­ins). This won't sur­prise you be­cause you know that cer­tain mush­rooms are poi­so­nous and you may know of the afla­tox­ins, nox­ious chem­i­cals made by molds that grow on stored grains.