In MS, the immune system can attack the cells responsible for B12 absorption, while thyroid disorders can disrupt hormones that influence B12 metabolism
Stress: Chronic stress and elevated cortisol can interfere with growth hormone signaling
The pattern fades by week 3 in nearly all reports
The outer thigh, midway between the hip and the knee, is a reliable subcutaneous injection site and is the preferred alternative when the abdomen is uncomfortable or if site rotation requires a break from abdominal injections
Drug Design, Development and Therapy, 16, 41934204
The main rationale for cycling rather than continuous use involves conservative safety practices given limited long-term human data, cost management, and theoretical concerns about receptor desensitization with extended exposure