Because tumor growth also depends on new blood vessels, several reviews describe this as a theoretical concern that has not been resolved in humans (Sehgal et al., Pharmaceuticals, 2025)
This can cause a variety of symptoms, including tingling, numbness, burning, poor balance, and walking difficulties
In addition to the conditions mentioned above, several risk factors increase the likelihood of B12 deficiency: Smoking Alcohol abuse Endocrine-related autoimmune disorders (such as diabetes or thyroid disorders) Gastrointestinal disorders like Crohns disease History of gastric bypass surgery or other stomach-altering surgeries Optimize Your Health
Animal trials show reduced ulcer severity and improved mucosal healing, but translating this to human benefit remains unproven
After a 10 percent weight loss, total energy expenditure typically declines by approximately 15 percent, meaningfully more than the change in body mass alone would account for
The recommended dosage for B12 injections in adults is generally 100 mcg (0.1 mL) daily for 6 or 7 days, followed by a maintenance dose of 1,000 mcg once a month
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