A completely different take on this phrase is that discretion means being discrete as in protecting people or information from exposure in some manner. If one is to be perceived as possessing valor by others, then they cannot express this by being merely brash and powerful.
Probiotics are essential (for at least a month or two after the antibiotics stop, depending on the potency) when you have had antibiotics to replenish the beneficial bacteria.
2.) Probiotics. Probiotics are good bacteria that are needed by the body to promote good digestion and gut health. Antibiotics don't just kill the infection and bad bacteria within our bodies. They destroy the probiotics (the good bacteria) as well.