During significant caloric restriction, the body may reduce its metabolic rate as a protective mechanism, which can manifest as decreased energy
You can find genetic testing with various companies such as 23andme.com Its estimated that those with one mutation (heterozygous) decrease their ability to methylate by 30% and those with two mutations (homozygous) decrease their ability to methylate by 70%, making it virtually impossible to get adequate B12 from diet alone (19)
B12 shots are a safe, effective supplement that can be used to improve overall energy levels and combat signs of aging
They come from specialized compounding pharmacies, which adds to the expense
Avoid freeze-thaw cycles: Once moved from freezer storage to refrigerator storage, maintain refrigeration
Insider's takeaway Vitamin B12 injections are for those with a severe B12 deficiency or conditions that prevent their body from effectively absorbing the vitamin, Moreno says