While supplementing with up to 2,000 mcg of B12 is considered safe for treating deficiencies, it is advisable to consult a healthcare professional to determine if supplementation is necessary, especially if you are taking medications or are pregnant
During prolonged exercise or heavy sweating, replacing electrolytes may also be beneficial
As to the aches and pains, breathlessness etc, this could be due to B12 needing potassium to build RBC, so I would check out low potassium symptoms and eat a banana or maybe two until you have fathomed it out
Both glycerol and fatty-acid release can be quantified in adipocytes or ex vivo adipose tissue, but measured values are affected by reuptake, re-esterification, substrate binding, sampling time, and nonlinear accumulation
Using a clean and stable environment for administration
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