7. Muscle Weakness
If you go from bench pressing 100-pounds to struggling with picking up your laundry, you may be suffering a lack of B12 vitamin. B12 is relied on for oxygenation of organs…and muscles.
As a result of lack of vitamin B12 and insufficient oxygenation to muscles, sluggishness and uncharacteristic muscle weakness may result. Suddenly an individual who could carry 5 bags of groceries for 4 blocks will struggle if their purse or gym bag is too heavy.