Andrew Huberman, Ph.D. on Instagram: "TOPICS COVERED ON SMARTLESS PODCAST OUT NOW • Topics covered: NAC: and the very interesting peer reviewed data on lowering frequency of respiratory infections. I take it several times per day in winter or when around sick people or when traveling. I first learned about it from an ER MD. It’s a precursor to glutathione. NAD (what I take to increase it and why; hint: it’s not about longevity at all). NICOTINE: how to balance its cognitive enhancing versus (hig