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B12 helps form red blood cells, which are essential for delivering oxygen to muscles during physical activity

The most widespread indicators include unexplained muscle weakness, a constantly sore or swollen tongue, chronic brain fog, tingling sensations or pins and needles in your hands and feet, persistent mood shifts, and a pale or yellowish skin tint

Vitamin B12 plays a key role in various bodily functions, making it essential for maintaining optimal health

Some international products may not meet Canadian quality expectations despite acceptable specifications in origin countries

Family Practice 2006;23:27985