While B12 is generally safe, caution is needed in specific clinical situations: Lebers Disease (Hereditary Optic Neuropathy): B12 injections are generally contraindicated or should be used with extreme caution, as they may potentially aggravate optic atrophy in this rare condition
If tiredness is caused by poor sleep, stress, anaemia from another cause, thyroid problems, depression or another condition, B12 may not solve it
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B12 appears in animal foods and fortified products
Waist circumference and other body measurements can be tracked
Indications of use An aid in raising vitamin B12 levels in cattle and horses, calves and foals