Keep in mind that the main concern with consuming strains that produce D-lactate is their ability to cause D-lactate acidosis.
Smidge Sensitive Probiotic contains L. plantarum, which is not technically D-lactate free.
However, we include it for an excellent reason. It has been proven to reverse acidosis. L. plantarum initially produces L(+)-lactate, and then switches to making D(-)-lactate, allowing for equilibrium to be reached. The production of D(-)-lactate in L. plantarum is linked to the cell wall's biosynthesis.
This case is similar for L. gasseri, which predominantly produces L(+)-lactate during the growth phase and switches to D(-)-lactate when the growth cycle plateaus.
Additionally, L. salavarius primarily produces L-lactate, and this is why it is commonly referred to as "D-lactate free."
But, in reality, it does create a small amount of D-lactate. No studies have shown that this strain has ever caused acidosis.