Vitamin B12, in its natural form, is safe during pregnancy and breastfeeding
Most effective depends on the goal: GHK-Cu tends to be most effective for global skin rejuvenation (texture, fine lines, recovery after procedures)
Michael Greger, Chief Science Officer at NutritionFacts.org, When selecting a B12 supplement, its important to focus on bioavailability
Should You Take Vitamin B12 in the Morning or at Night
Patients should seek emergency medical help (call 999) if they experience: Difficulty breathing, wheezing, or throat tightness Swelling of the face, lips, tongue, or throat (angioedema) Widespread urticarial rash (hives) developing rapidly Dizziness, fainting, or rapid heartbeat suggesting anaphylaxis These symptoms typically occur within minutes to hours of administration, most commonly with injectable preparations