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Two vials can look identical, contain the same amount of liquid, yet deliver completely different doses because one solution is more concentrated than the other
Use the same brand, concentration, and source for several vials while maintaining perfect storage
Available from: MacFarquhar JK, Broussard DL, Melstrom P, Hutchinson R, Wolkin A, Martin C et al (2010) Acute selenium toxicity associated with a dietary supplement
Young MA, Wald JA, Matthews JE, et al
Try to spend at least 20 minutes eating
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