In a 2011 randomized controlled study, researchers recruited 54 healthy men whose mean 25(OH)D levels were in the deficiency range for a year-long intervention. They divided the subjects into two groups. The first group of 23 men had an average serum 25(OH)D of nmol/L and took a daily placebo. The second group of 31 men had an average serum 25(OH)D of nmol/L and took a daily 3332-IU vitamin D supplement. After the trial was finished, the researchers observed a significant increase in total testosterone from nmol/L to nmol/L in the supplement group. 19 In contrast, there were hardly any changes in testosterone concentrations in the placebo group. 19 These findings suggest that men deficient in vitamin D who take a proper vitamin D supplement may fix low levels of low testosterone.
Great, great article. I’ve got a few questions, however. I’ve been lifting now for about 5 years, and really only a month or so have been SMART training (diet in check by tracking, progressive overloading in the 4-6 rep range, essentially following BLS) and have made substantial progress on cutting. Does this mean I’m technically a beginner by these terms, being that I’ve trained for years but only recently started becoming fully educated? Should I be cutting first? My plan was (starting at ~15% BF) to get down to about 8 or 9 (I am roughly 11-12% now). Should I be cutting that low, or bulk earlier to cash in on “genetic potential”?
For the average healthy adult, the recommended maximum dose of acetaminophen during a 24-hour period is 4 grams (4000 mg) or eight extra-strength tablets. (Each extra-strength tablet contains 500 mg, while each regular strength tablet contains 325 mg.) Among children, the dose of acetaminophen is determined on the basis of each child's weight and age, explicitly stated in the package insert. If these guidelines for adults and children are followed, acetaminophen is safe and carries essentially no risk of liver injury. A person who drinks more than two alcoholic beverages per day, however, should not take more than 2 grams (2000 mg) of acetaminophen over 24 hours, as discussed below, since alcohol makes the liver susceptible to damage from lower doses of acetaminophen.