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You should always contact your doctor immediately if you experience any of these reactions
Yes, you can give yourself B12 shots if youre trained and have a doctors watch
Deficiency creates a bottleneck in this process that manifests as fatigue, low motivation, and poor exercise recovery
If you are not deficient, a B12 injection does not add measurable energy or speed up weight loss
Heating can degrade peptides, so working at room temperature is advisable
Proton pump inhibitors and similar medications that lower stomach acid might decrease the absorption of vitamin B12 from food, but this is less of a concern when receiving B12 injections because they bypass the digestive system entirely
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