Yes, it’s available at several places.
I bought it when I was suffering from chronic bronchitis, but the one I bought upset my stomach. I may try a different one.
...the one I bought upset my stomach. I may try a different one.
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I had some issues the 1st time I tried it. Waited a few days and tried again, 1 600 mg capsule on an empty stomach, followed in 30 minutes with either kefir or some high probiotic yogurt. Works well.