Occasionally, some people notice mild, body-wide effects in the first day or so: Mild diarrhea or an upset stomach
Quinine: This compound, famously found in tonic water, can cause a severe, rapid drop in platelets in sensitive individuals
While occasional stomach pain is common and often harmless, persistent or severe pain should not be ignored
Vitamin B12 is crucial for various bodily functions, including DNA synthesis, energy production, and the formation of red blood cells
Stop use and seek medical advice if you develop rash, shortness of breath, chest pain, severe swelling, persistent vomiting, or any unexpected or worsening symptoms
Takeaways A B12 test can tell how much vitamin B12 you have in your body