We all understand that some days our concentration and mental focus are better than others. When we aren’t at our best, it can be frustrating not being as mentally sharp and alert as we want to be. Just like the rest of your body, your brai...
Reviews
3.5
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Need more time to try
The core 21 improved my sleep but I have not used the master brain as recommended so I cannot give a great review of that
R
Robin · June 29, 2026
AM good/PM not so much
The AM one I could tell a difference in energy and focus but the PM was not felt odd and would wake up several times in the night not restful sleep.