Essentials: Tools for Hormone Optimization in Males | Dr. Kyle Gillett

This Essentials episode revisits a conversation between host Andrew Huberman and returning guest Dr. Kyle Gillett about what males can do across the lifespan to support healthy hormone status. The opening question is broad: what should men do, and what should they avoid, if the goal is a long arc of hormone health rather than a short-term boost?

The guest's answer starts with measurement. He compares a person to a brand-new car coming off the assembly line, which gets a full diagnostic workup by being hooked up to a computer, and argues that humans deserve the same treatment. He frames development as something that never fully ends, even after puberty, so progress should be monitored across the whole lifespan.

For blood work, he says testosterone should be measured either together with SHBG or as free testosterone. SHBG, sex hormone binding globulin, is described as the protein that binds androgens and estrogen in the body, with stronger androgens binding more strongly. He uses DHT, which he calls the strongest bioidentical androgen and a major driver of secondary sexual characteristics during puberty, to show why both numbers matter: very high SHBG can let total DHT run higher because it is not metabolized, while leaving less of it free. The aim he describes is a balance between enough free DHT and enough total DHT.

Without a major intervention, he suggests a follow-up test at about six months, decided through shared decision-making with the person's physician.

Asked to walk through daily protocols, the guest starts with lifestyle pillars. Diet and exercise come first, and sleep is especially important during puberty. His main dietary point is not to cut out things that are helping. His example is dairy: removing it suddenly during puberty takes away a food that can help raise IGF-1 and free IGF-1. He says IGF-1 supports growth, including genital development, secondary sexual characteristics, long bone growth, skin growth and hair growth.

He also stresses adequate vitamin D, which he says supports testosterone production as well as bone mineralization and stature. He gives about 25 as a rough age, not a strict cutoff, up to which optimizing growth hormone and IGF-1 helps bone density and bone growth. In the same discussion he says growing males want enough free estrogen, though not too much. The goal is to stockpile bone and lower the risk of osteoporosis or fractures from thin bones later in life.

The host acknowledges that ethics and food allergies shape diet choices, then asks about strict carnivore or strict vegan diets. The guest separates the answer by age. He calls such a diet a possibly reasonable option in a person's late 20s, but says that for the early 20s and teens:

it is a horrible idea because it is likely to significantly decrease your free androgens, so you will have less testosterone acting on receptors through the body.