Why deficiency affects far more than your bones

At Torre Prime, we often say: you can’t optimize what you haven’t stabilized. Vitamin D is one of the clearest examples of this principle.

Despite being labeled a “vitamin,” vitamin D functions more like a hormone—a master signal that influences multiple systems at once. When levels are low, the body doesn’t simply lose one function; it begins to drift off course across immunity, metabolism, muscle, brain health, hormones, and inflammation.

Vitamin D is not a supplement of convenience. It is a foundational regulator.

Originally created with a specialized focus on gay, bisexual, and queer (GBQ) men, the demand from women has grown rapidly. Women have asked for a precision-based, emotionally intelligent longevity program that respects their physiology, their lived experiences, and their need for care that goes beyond templates. - Gabriel Felsen MD

Many gay men reach their 50s wishing they had started caring for their metabolism, strength, sexual vitality, and emotional health sooner. In this article, Dr. Gabriel Felsen breaks down the most common regrets—and how modern longevity medicine can help you change your trajectory starting today.