Aromatase activity varies between men because CYP19A1 — the gene encoding aromatase — is polymorphic. Different CYP19A1 variants alter how the enzyme is expressed and how efficiently it converts testosterone to estradiol. The Precision Peptide Genetic Test analyzes CYP19A1 as part of 14 pathways and 150+ genetic insights across 49 peptides.

Not exactly — but the answer matters. The Precision Peptide Genetic Test doesn't predict whether a specific androgen protocol will work. It maps six biological variables that determine how testosterone behaves in your body: SHBG, CYP19A1, AR, SRD5A2, LHCGR, and CYP17A1. Part of 14 pathways and 150+ genetic insights, that map is the most actionable starting point available.

In the Precision Peptide Genetic Test, the Reproductive Health pathway delivers 6 insights across genes governing testosterone bioavailability, estrogen conversion, androgen receptor sensitivity, DHT production, and HPTA axis function. Part of 14 pathways, 49 peptides, and 150+ genetic insights, these 6 insights map male hormone balance as a connected genetic system.

Genetics shapes estrogen in men through four pathways: how much testosterone converts to estradiol (CYP19A1), how efficiently it clears (COMT, MTHFR), how sensitively tissues respond (ESR1), and how much substrate is available (SHBG, SRD5A2). The Precision Peptide Genetic Test maps all these variables across 14 pathways and 150+ genetic insights.

Yes — SHBG genetics directly affect how free testosterone responds to androgen-pathway protocols. The Precision Peptide Genetic Test analyzes SHBG variants as part of 14 pathways and 150+ genetic insights across 49 peptides, giving providers the genetic context to understand why the same protocol produces different free testosterone outcomes in different men.

The Precision Peptide Genetic Test analyzes six Reproductive Health genes that directly influence testosterone levels, conversion, and signaling — including SHBG, CYP19A1, AR, SRD5A2, LHCGR, and CYP17A1. Part of 14 pathways and 150+ genetic insights across 49 peptides, these variants explain why testosterone behaves differently in different men.

The Precision Peptide Genetic Test analyzes 6 Reproductive Health insights that explain why androgen-pathway protocols produce different outcomes for different men. SHBG, CYP19A1, AR, SRD5A2, LHCGR, and CYP17A1 each shape how testosterone is bound, converted, sensed, and signaled — as part of 14 pathways and 150+ genetic insights across 49 peptides.

The Precision Peptide Genetic Test analyzes SRD5A2 — the gene controlling 5-alpha reductase, the enzyme that converts testosterone into DHT. Part of 14 pathways and 150+ genetic insights across 49 peptides, your SRD5A2 variants determine how much testosterone is routed toward the androgen pathway's most potent signaling molecule.

The Precision Peptide Genetic Test analyzes AR CAG repeats — the genetic variable that determines how sensitively your androgen receptor responds to testosterone. Part of 14 pathways and 150+ genetic insights across 49 peptides, CAG repeat length helps explain why two men with identical testosterone levels can have completely different androgen responses.

The Precision Peptide Genetic Test analyzes CYP19A1 — the aromatase gene that controls how much testosterone your body converts to estrogen. Part of 14 pathways and 150+ genetic insights across 49 peptides, your CYP19A1 variants help explain why estrogen levels vary between men on the same androgen-pathway protocol.

The Precision Peptide Genetic Test analyzes 6 Reproductive Health insights covering men's hormone pathways — SHBG, CYP19A1, AR, SRD5A2, and LH/FSH receptor variants — within a panel of 14 pathways, 49 peptides, and 150+ genetic insights. This pillar guide breaks down each gene, what it reveals about testosterone response, and why DNA is the most underused variable in hormone protocols.

SHBG — sex hormone-binding globulin — determines how much of your testosterone is biologically available to cells. High SHBG binds more testosterone, reducing free levels; low SHBG releases more. SHBG gene variants shape your baseline level genetically. The Precision Peptide Genetic Test analyzes SHBG as part of Men’s Hormone insights across 14 pathways, 49 peptides, and 150+ genetic insights.