Schneider-Helmerts human work echoed the same theme from a different angle: repeated morning injections still had a strong positive effect on night sleep, while two doses daily did not produce that effect
2,97 Studies and clinical practice of treatment of pernicious anaemia with regular high-dose injections has confirmed the safety of B12 at high dosages, and therefore neither the Institute of Medicine (IOM) in the USA nor the European Food Safety Agency (EFSA) have set an upper limit

Composition Active Ingredient: Cyanocobalamin (Vitamin B12) Dosage Form: 2ml per vial Effects Stimulates red blood cell production Supports proper nerve function Enhances energy and reduces fatigue Promotes healthy brain and cognitive function Assists in DNA synthesis and cellular metabolism Benefits Treats Vitamin B12 deficiency and megaloblastic anemia Reduces tiredness, weakness, and mental fog Helps manage neurological symptoms such as numbness or tingling Essential for vegans, elderly individuals, and those with malabsorption issues Can improve mood, memory, and overall wellness Route of Administration Intramuscular (IM) or Subcutaneous (SC) injection To be administered by a qualified healthcare professional Packaging: 50 vials per box *The product has contraindications
Even if color-changing eye drops worked as advertised, theyd be unsafe