Yes, taking both is generally safe as B vitamins are water-soluble, but you may receive excessive amounts of certain vitamins, particularly B6 and niacin
Despite what some sources may say, there's no scientific evidence that taking B12 supplements will increase energy, concentration, memory or mood in people who already have normal B12 levels
The AARD of Soltani-Mazloumi, Jouyban et al., MST, Sodeifian-Sajadian, Madras and Gonzlez et al
Also be aware that drinking green tea may significantly affect blood levels of a common beta-blocker, as well as statins, blood-thinners, and thyroid medication
Benefits of NAD+ therapy are improved energy, cognitive function, recovery, and immune health, as well as decreased inflammation
If you havent had a regular source of B12 for more than a few months, take 2,000 g once a day for 2 weeks to replenish your stores