For nerve-related issues, it may take a few weeks for noticeable improvement
Human safety and efficacy remain completely unestablished
Vitamin D deficiency has now been linked to breast cancer, colon cancer, prostate cancer, heart disease, depression, weight gain, and other maladies
Modeling 56 , 599604 (2016)
If B12 deficiency is contributing to your hair loss, heres a realistic timeline for improvement: First 24-72 Hours (After Injection) Energy levels often improve noticeably Mental clarity may begin to return Some people report immediate mood improvements First 1-2 Weeks Fatigue and weakness typically continue to improve Sleep quality may get better Neurological symptoms like tingling may begin to ease 4-6 Weeks Hair shedding often starts to slow Scalp health may improve 3-4 Months Visible new hair growth may become apparent Hair grows at approximately 1cm per month, so patience is essential Existing hair may feel stronger and healthier 6-12 Months Significant improvement in hair density (if B12 was a contributing factor) Hair follicles have had time to complete full growth cycles Long-term benefits become established Important note: Results depend on B12 being a genuine contributor to your hair loss
But desperate times, you know