You should not take cyanocobalamin-based products if you: Have a known cobalt allergy Have Lebers hereditary optic neuropathy , as B12 can worsen vision in this condition Discuss nasal B12 with your clinician first if you have: Severe megaloblastic anemia Polycythemia vera or other bone marrow disorders Low iron or folate Kidney disease Are undergoing chemotherapy or using bone marrowsuppressing drugs Are pregnant or breastfeeding Possible Side Effects Most side effects reported with B12 nasal products are mild and temporary: Slight nasal irritation, burning, or dryness Runny or stuffy nose, sneezing, or sore throat Mild headache Nausea or a brief metallic taste Tingling or pins and needles sensations, especially early on as nerves recover Serious reactions are rare but require immediate medical care: Rash, hives, or intense itching Swelling of the face, lips, tongue, or throat Trouble breathing or swallowing Fever, chills, or signs of infection that dont match a simple cold If anything feels out of proportion or youre unsure, stop the product and speak with your healthcare provider or seek urgent care
Key differences to look for include: Symptoms caused by HCG injections typically occur within a few days to a week after the injection and may subside as the hormone levels decrease
Spirits Make It Easy to Drink More Than You Realize Most spirits run 3540% ABV or higher and understanding alcohol proof helps explain why a single 1.5-ounce shot contains as much ethanol as a standard beer
These add relatively small amounts to the monthly total but should be factored into the overall budget
The needle may hurt a little when it is first inserted
