This site's own mechanism sequence lists this specific third step — worth understanding it on its own.
This site describes it directly: Bromelain, a pineapple-stem enzyme (2400 GDU/g), is included to support the body's own process of thinning mucus so it can be cleared naturally.
This site names a specific potency figure, 2400 GDU/g, rather than a bare ingredient name — worth reading that specificity as more checkable against your own bottle's label than a generic "Bromelain" listing would be.
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