Adequate NAD + levels are critical to maintaining SIRT1 activity, which can delay apoptosis and provide vulnerable cells with additional time to repair even after the repeated oxidative stress insult – what is good for normal (although damaged) cells but detrimential for neoplastic cells due to pro-survival programme activation. Namely
It's just ok. The sound is fine and it has never broken on me, but I'm not blown away by it either. A good friend has been running his NAD integrated amp for close to 15 years with no issues, and I think it has great sound. If you're buying used, be sure you research the exact model; some do better than others.
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is nad good for you