As with many micronutrients, the foods that have the highest concentration of vitamin B12 are organ meats and shellfish
[3] Side effects [edit] Some side effects for peptide hormones and analogues are motor paralysis, diabetes mellitus, hypothyroidism, headaches, vomiting, thrombosis, osteoporosis, and cancer
By taking very high doses, typically 1000 to 2000 micrograms (mcg) daily, enough B12 enters your bloodstream to effectively correct a deficiency and replenish your stores
Vision problems : In some cases, a B12 deficiency can cause vision changes
It could manifest as worsening B12 deficiency symptoms like skin rashes, tingling sensations, burning pain, tremors, heart palpitations, joint pain, and more
Batch-specific COAs