UK Medicines Information, NHS
Individuals with B12 deficiency, which can occur due to dietary restrictions (e.g., vegan or vegetarian diets), gastrointestinal disorders affecting absorption, older age, or certain medical conditions that interfere with B12 absorption
Other side effects that can occur include: Excessive sweat production Rapid weight gain Pain when breathing Shortness of breath when lying down Anxiety Increased or irregular heart rate Numbness, tingling or muscular weakness Increased thirst Urinary frequency B12 injections can also cause allergy symptoms immediately after administration, like difficulty breathing, a swollen throat, mouth, or swelling of the mouth, tongue or face
They cost marginally more but save significant peptide over a full cycle
Some doctors even claim to have their own special skinny shot cocktail