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Refrigeration before opening is generally not required but is not harmful if done properly
Yet, a randomized, double-blind, placebo-controlled trial in 215 men (35-55 years old) found that daily supplementation with B vitamins (at 3 to 13 times the current RDA, except for folic acid, which was included at a dose equivalent to the RDA), vitamin C (500 mg/day), zinc (10 mg/day), and magnesium (100 mg/day) for 33 days had no effect on measured performance of executive functions, including the Stroop color-word test, the peg-and-ball task, and the Wisconsin card-sorting task (134)
For a cell to receive the message, it needs a specific "docking station" called a growth hormone receptor
At 2 mg/ml: 50 units
doi:10.1097/GRF.0000000000000595
