Vitamin D is a steroid hormone involved in the synthesis of other important hormones (including testosterone). You'd be well advised to get your levels checked, get some sun, and supplement with 1,000 IU a day.

Methusela has a new installment to his Paleo/Primal in a Nutshell video series.



Check out his other cute and informative videos on nutrition  and exercise!

Thanks,  Methuselah

Read more on Vitamin D here .