ED is a cardiovascular signal.

ED is rarely 'just' psychological. 70% of cases have biological roots: low testosterone, diabetes, thyroid dysfunction, insulin resistance, high cholesterol, hypertension, stress hormones, or vascular disease. Many men take sildenafil without ever investigating why. You might be medicating a symptom of low T, metabolic syndrome, or chronic stress—and missing the actual problem. That's why testing comes first.

Yes. Testosterone drives sexual desire and vascular function in the penis. Low T reduces blood flow, dampens libido, and increases anxiety—a triple blow to performance. Many men with ED discover their total testosterone is 'normal' but free testosterone is critically low, or SHBG is blocking what little T they have. One blood test—not a guess—reveals the real picture. If low T is the culprit, treating it directly often restores function better than PDE5 inhibitors alone.

Yes. High blood sugar damages blood vessels and nerves that control erections. Men with undiagnosed diabetes or prediabetes often experience ED first—it's a red flag symptom. HbA1c (three-month glucose average) and fasting insulin tell you if metabolic dysfunction is the cause. If so, improving insulin sensitivity through diet, exercise, and sometimes medication can restore erectile function within weeks or months. Sildenafil alone won't fix metabolic damage.

Essential tests include total testosterone, free testosterone, estradiol, prolactin, thyroid panel (TSH, free T3, free T4), HbA1c, fasting insulin, lipid panel (cholesterol, LDL, triglycerides), vitamin D, heart markers (homocysteine, C-reactive protein), blood pressure, and complete metabolic panel. arq. runs 100+ biomarkers, revealing whether ED stems from hormones, metabolic issues, vascular disease, or multiple causes. One comprehensive test beats guessing.

Sildenafil is safe when prescribed by a physician and you don't have uncontrolled hypertension or take nitrates. But it's a bandaid. Taking sildenafil every time masks the underlying cause—low T, high blood sugar, poor cardiovascular fitness. Some men depend on it indefinitely when they could fix the root problem and regain natural function. The best approach: test first, identify the cause, treat it, and use PDE5i as a bridge if needed—not as your only solution.

Chronic stress raises cortisol, suppresses testosterone, and triggers the sympathetic nervous system (fight-or-flight)—the opposite of what you need for an erection (parasympathetic dominance). Elevated cortisol also increases blood pressure and inflammation, damaging blood vessels. Sleep deprivation, work stress, and anxiety create a vicious cycle: stress → low T and high cortisol → ED → anxiety about performance → worse ED. Your biomarkers (cortisol, testosterone, inflammatory markers) reveal how much stress is playing a role.

Yes. Hypothyroidism (low thyroid) slows metabolism, reduces testosterone, and impairs blood vessel function—triple ED contributors. Hyperthyroidism can cause anxiety and cardiovascular problems that also harm sexual function. Many men with thyroid issues are never diagnosed because they dismiss fatigue, weight gain, and erectile problems as 'stress' or 'aging.' A simple blood test (TSH, free T3, free T4) catches thyroid dysfunction. If present, treating it often restores erectile function within weeks.

arq. doesn't hand out sildenafil without asking why. Step 1: 100+ biomarker test at home. Step 2: Your physician reviews results to identify root causes. Step 3: Customized protocol—TRT if hormonal, metformin or GLP-1 if metabolic, cardiovascular support if vascular, stress management if cortisol-driven. Many men see improvement after 4–8 weeks of addressing the actual cause. PDE5 inhibitors are available if needed, but they're a tool, not the first move.