When deficiency develops, symptoms can include fatigue, weakness, numbness or tingling in the feet or hands, difficulty walking, mood changes such as depression, and problems with memory or concentration. Untreated, severe deficiency can lead to anemia and neurological damage, so medical attention and proper supplementation are essential. Why Choose B12 Injections
The complete side effect frequency breakdown from Phase 2 trials: Very Common (20%+ of patients at 12mg dose) Nausea: 28% Typically mild to moderate, peaks weeks 4-8, usually resolves by week 12 Diarrhea: 24% Usually transient (1-3 weeks), rarely severe Constipation: 21% Paradoxically coexists with diarrhea in different patients Common (10-20% of patients) Vomiting: 17% Decreased appetite: 16% (beyond therapeutic effect) Injection site reactions: 14% Fatigue: 13% Dyspepsia (indigestion): 12% Headache: 11% Uncommon (2-10% of patients) Abdominal pain: 8% Dizziness: 7% Gastroesophageal reflux: 6% Hypoglycemia in diabetics on other medications: 5% Increased heart rate (average 2-4 bpm): 4% Hair thinning/loss: 3% (typically temporary) Rare but Serious (Under 2%) Pancreatitis: 0.3% (3 cases out of 1,032 patients, all resolved with discontinuation) Gallbladder events: 1.4% (expected with rapid weight loss regardless of method) Acute kidney injury: 0.7% (all cases associated with severe dehydration) KEY TAKEAWAY: About 30% experience meaningful nausea in the first 4-8 weeks
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Although a few missed or delayed periods are typical during this time, reach out to your healthcare provider if your cycles are shorter than 21 days, longer than 45 days, or if you go 90 days or more without a period (22)
What it looks like
Les personnes atteintes ne peuvent absorber la B12 par voie orale classique
