If you have a deficiency, restoring your B12 levels will help you feel more energetic over time as your metabolism and red blood cell production improve
1: Sikiric P, Barisic I, Udovicic M, Lovric Bencic M, Balenovic D, Strinic D, Posilovic GZ, Uzun S, Vranes H, Krezic I, Lozic M, Stambolija V, Premuzic Mestrovic I, Oreskovic LB, Kalogjera L, Strbe S, Sikiric S, Tomic L, Stupnisek M, Kordic M, Tvrdeic A, Seiwerth S, Boban Blagaic A, Skrtic A
Other Supplements for Respiratory Health NAC is the most directly relevant supplement for mucus, but its not the only nutrient that supports respiratory health
Review article references were checked to ensure inclusion of all possibly relevant studies
Serious adverse events appear rare in community reports, though underreporting of problems remains possible