As a veterinarian, I would not recommend that clients inject or administer any medication or supplement without discussing it with their veterinarian
Some people choose to have B12 injections, but be sure to obtain medical advice before going ahead with this method of consuming this vitamin
Feature Vitamin Injections Oral Supplements Bioavailability Up to 100% (direct muscle absorption) Variable, often 10-50% (digestive system absorption) Speed of Action Rapid (hours to days for noticeable effects) Slower (days to weeks for noticeable effects) Ideal Candidates Diagnosed deficiencies, malabsorption issues, pernicious anemia, older adults, vegans/vegetarians with deficiency General maintenance, mild deficiencies, individuals with healthy digestion and absorption Administration Intramuscular injection by professional Pills, capsules, liquids taken by mouth For general maintenance in healthy people, oral supplements work fine
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