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0:59
YouTube
Dr. Brian Yeung, ND
L-Theanine + Caffeine = Brain Upgrade?
L-theanine may enhance focus 🧠 and mental clarity—but mostly when teamed up with caffeine. Here's why. Watch the FULL video: https://youtu.be/IV3vSqXOYp4
1.8K views
8 months ago
Watch full video
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