B12 shots are generally considered safe and may be recommended if you have a lab-confirmed deficiency
There are 2 main classes of medications (as well as some non-prescription supplements) which are commonly used to treat BPH, and all have the potential to negatively impact male fertility
Feeling lethargic for no reason
Conversely, isoniazid and pyrazinamide (tuberculosis drugs) are structural analogs of niacin that can interfere with niacin metabolism, potentially precipitating pellagra in rare cases
Microcytic anemia (low MCV, typically below 80 fL) most commonly indicates iron deficiency, thalassemia, or anemia of chronic disease
And, if the two amino acids mentioned above look familiar to you, there is a good reason why