I've tried AB+ at least 3 times over the past 10? yrs and never saw any improvement. But that doesn't mean it "doesn't work" it may just be that it isn't needed with all the additives I am using and frequent ICP tests: Triton CORE 7; many Zeovit additives; TM A & K; all the Triton Elements (for correcting deficiencies on ICP tests).