A Cochrane systematic review of NAC for COPD exacerbations (39 RCTs, n=7,436) found that NAC and other mucolytics significantly reduced the frequency of acute exacerbations (OR 0.75, 95% CI 0.62-0.92) (Poole et al., Cochrane Database Syst Rev, 2019) [43]
Some of the best B12 vitamin foods include beef liver, sardines, Atlantic mackerel, lamb, wild-caught salmon, nutritional yeast, cheese, beef and eggs
However, the list includes an S0 category for pharmacological substances that are not addressed elsewhere and have no current approval by a governmental regulatory health authority for human therapeutic use
Here are some expert tips: Choose a Qualified Medical Professional Always get injections from a certified doctor or trained healthcare provider