When you take oral vitamin B12 supplements, your digestive system limits how much your body can absorb particularly for patients with absorption issues, digestive conditions, or advancing age
But now theres something new on the market postnatal vitamins
What is a Vitamin B12 Injection
B-12 shots boost your mood by increasing the production of serotonin

declining exercise performance Baseline Labs (DUTCH + Standard Panels): Estradiol: Fluctuating wildly (perimenopause) Progesterone: Very low (anovulatory cycles) Cortisol: Elevated evening levels Fasting insulin: 14 IU/mL (insulin resistant) HbA1c: 5.8% (prediabetic range) IGF-1: 156 ng/mL Weight: 178 lbs (goal: 145 lbs) Treatment Protocol: Weeks 1-8: Bioidentical hormone therapy (estradiol patch + oral progesterone) to stabilize hormones, address cortisol with adaptogenic support and sleep optimization Weeks 9-12: Initiate semaglutide 0.25 mg weekly, titrating to 1.0 mg by week 12 Weeks 13-26: Add tesamorelin 2 mg daily to preserve muscle and target visceral fat during weight loss Ongoing: Metformin 500 mg twice daily for insulin sensitivity 26-Week Results: Weight: 148 lbs (-30 lbs total, -16.9%) Body fat: 32% 24% (DEXA) Lean mass: Maintained (actually +1.2 kg gain despite caloric deficit) Fasting insulin: 6 IU/mL (normalized) HbA1c: 5.1% (out of prediabetic range) IGF-1: 223 ng/mL Patient Report: I was terrified Id lose muscle along with the fatId seen friends lose weight on GLP-1s and end up skinny fat. The combination protocol meant I lost fat, kept my muscle, and actually got stronger

WARNINGS Patients with early Lebers disease (hereditary optic nerve atrophy) who were treated with cyanocobalamin suffered severe and swift optic atrophy