While heart palpitations are not a common side effect, awareness and monitoring are important
But make no mistake about it: Becoming (and staying) lean is first and foremost for your HEALTH

Why It Matters This service may be relevant for individuals experiencing: Persistent fatigue or low energy Difficulty concentrating or brain fog Poor focus or mental sluggishness Dietary insufficiency, including vegan or vegetarian diets Reduced gastrointestinal absorption, such as in pernicious anaemia or certain digestive conditions Potential benefits may include: Improved energy levels and mental clarity Support for normal metabolic function Mood and general wellbeing support Direct absorption by bypassing the digestive system Who is the Vitamin B12 Injection for Vitamin B12 and B complex injections may be suitable for individuals with ongoing fatigue or low energy, people experiencing brain fog or cognitive slowing, those following restrictive diets, athletes or individuals under sustained physical or mental stress, and patients with known absorption issues including pernicious anaemia or other conditions affecting nutrient uptake

Arthur Heller, HealthTap There is also the risk of bacterial contamination, which increases as the B12 ages
The most common side effects affect the injection site, and may include: If you experience any of these symptoms, its important to speak with a healthcare professional