Low libido. Erectile dysfunction. Poor sexual performance. Fatigue in bed. Most men assume these are psychological or just part of aging. They're not. Sexual dysfunction is almost always biochemical — a problem with hormones, blood vessels, or metabolism. Yet men suffer in silence, or worse, self-medicate from pharmacy shelves without understanding what's actually wrong.
The truth: your sexual health lives in your bloodwork. Eight markers determine whether you can perform, whether you want to perform, and whether your body can deliver. Without testing, you're treating symptoms blind.
Sexual health in India is taboo. Men don't discuss it with friends, family, or doctors. So they turn to pharmacies. They buy Viagra, Cialis, or unverified supplements without ever understanding the root cause. Some try unregulated testosterone boosters. Others resort to "tantric" methods that don't work because the underlying problem is biochemical, not behavioral.
The problem: treating the symptom without diagnosing the cause is like fixing a flat tire without checking if the road is broken. A man with erectile dysfunction from diabetes won't improve on Viagra alone — his blood vessels are damaged. He needs glucose control. A man with low libido from high prolactin won't respond to testosterone replacement — prolactin is suppressing his desire. He needs dopamine agonists or a thyroid fix.
This is why blood tests come first. They tell you what's actually wrong.
Most men get "total testosterone" tested. This is a mistake. Total testosterone includes testosterone bound to proteins (SHBG and albumin), which is unavailable to your tissues. Free testosterone is what your body can actually use — and this is what drives libido, erection quality, and sexual endurance.
Normal range: 8-25 pg/mL. Below 8 pg/mL = low libido, erectile dysfunction, fatigue. Indian men average slightly lower than Western men due to genetics and BMI trends.
Why it matters for you: if your total testosterone is 600 ng/dL but your free testosterone is only 5 pg/mL, you're functionally low. Your SHBG is too high (binding all your testosterone). Simply raising total testosterone won't help — you need to lower SHBG or optimize its binders.
SHBG is a protein that binds testosterone, making it unavailable. High SHBG = less free testosterone = erectile dysfunction and low libido despite normal total testosterone. This is the mechanism many men miss.
Normal range: 24-122 nmol/L. High SHBG (>100) reduces free testosterone availability and causes sexual dysfunction. SHBG rises with: elevated estradiol, liver disease, thyroid hyperactivity, and age.
How to fix it: manage estradiol if elevated, treat thyroid if overactive, reduce inflammation, improve insulin sensitivity through diet and exercise. Lowering SHBG is sometimes faster than raising testosterone.
Elevated prolactin directly suppresses GnRH (gonadotropin-releasing hormone), which signals testosterone production. High prolactin causes erectile dysfunction, low libido, and sometimes breast tenderness or galactorrhea (milk discharge) in men.
Normal range: 2-18 ng/mL. Above 20 ng/mL = sexual dysfunction. Causes include: dopamine-antagonist medications (antipsychotics, metoclopramide), prolactinomas (pituitary tumors), hypothyroidism, or idiopathic elevation from chronic stress.
Why it matters: a man with prolactin of 30 ng/mL will have ED and zero libido regardless of testosterone level. Treating prolactin (dopamine agonists like bromocriptine, or fixing underlying thyroid) often restores sexual function immediately.
Too little estradiol = erectile dysfunction and joint pain. Too much estradiol = erectile dysfunction, gynecomastia (breast tissue growth), and fat accumulation. Men need estradiol, but in balance.
Normal range: 20-40 pg/mL. Below 15 pg/mL or above 50 pg/mL impairs sexual function. The Goldilocks zone: 25-35 pg/mL.
Why balance matters: estradiol is necessary for bone health, sexual function, and cardiovascular health in men. Too little causes brittle bones and ED. Too much causes gynecomastia and metabolic dysfunction. Aromatase inhibitors or dihydrotestosterone (DHT) therapy might help if estradiol is high, but only under physician supervision.
Hypothyroidism (low thyroid) impairs sexual desire, erectile function, and metabolic rate. Hyperthyroidism (high thyroid) causes anxiety, insomnia, and erectile dysfunction. Thyroid dysfunction is hidden and common — many Indian men are undiagnosed.
Normal range: TSH 0.5-4.5 mIU/L, Free T4 9-18 pg/mL, Free T3 2.3-4.2 pg/mL. Outside these ranges = sexual dysfunction risk.
Why it matters: a man with TSH of 6.0 (subclinical hypothyroidism) will have low libido, poor erection quality, and fatigue. His total testosterone might be normal, but metabolic dysfunction kills sexual performance. Thyroid replacement often restores sexual function.
Diabetes is the #1 organic cause of erectile dysfunction. High blood glucose damages blood vessels (endothelial dysfunction), preventing adequate blood flow to the penis. But you don't need clinical diabetes to have vascular damage — insulin resistance and prediabetes do it too.
Normal range: HbA1c <5.7%, Fasting Insulin <12 mIU/L. Above 5.7% HbA1c = prediabetes and vascular damage. Fasting insulin >15 = severe insulin resistance.
Why it matters: a man with HbA1c of 5.9% and fasting insulin of 20 has undiagnosed insulin resistance. His blood vessels are already damaged. His erectile function is compromised. Fixing insulin resistance through diet, exercise, and sometimes metformin restores vascular function and erectile quality.
Your penile arteries are tiny — only 1-2mm diameter. They're the first to suffer from atherosclerosis. If your lipid panel is abnormal, your penile blood flow is compromised. High LDL, high triglycerides, and low HDL predict erectile dysfunction.
Normal range: Total Cholesterol <200 mg/dL, LDL <100 mg/dL, HDL >40 mg/dL (men), Triglycerides <150 mg/dL. Outside these = vascular risk and ED risk.
Why it matters: a man with LDL of 160 and triglycerides of 200 has arterial inflammation. His penile arteries are stiffening. ED is a warning sign of cardiovascular disease. Treating lipids improves erectile function and prevents heart attacks.
Chronic stress elevates cortisol, which suppresses testosterone production, impairs erectile function, and kills libido. High cortisol also increases SHBG (reducing free testosterone) and promotes visceral fat (worsening insulin resistance). Indian men face intense occupational and social stress — cortisol dysfunction is prevalent.
Normal range: Morning cortisol 10-20 mcg/dL, Evening cortisol 3-10 mcg/dL. Elevated morning cortisol or flat cortisol curve (no dip by evening) = chronic stress and sexual dysfunction.
Why it matters: a man with morning cortisol of 25 and evening cortisol of 15 has no daily dip. His stress hormones are chronically elevated. His testosterone is suppressed. His sexual drive is exhausted. Stress management, sleep optimization, and sometimes medication (ashwagandha, cortisol-lowering protocols) help restore sexual function.
Sexual dysfunction is rarely one-factor. A 35-year-old man might have:
If you treat only testosterone, you fix 20% of the problem. If you treat testosterone + lower cortisol, you fix 40%. If you test and treat all 8 markers, you fix 100%.
This is why arq.'s approach is comprehensive: test all 8 markers, identify which are abnormal, and build a protocol addressing each one.
ED or low libido? The cause is in your bloodwork. Talk to an arq. physician to run the 8-marker panel →
Most online clinics ask "Do you have ED?" and prescribe Viagra. arq. doesn't work that way.
Step 1: Comprehensive Bloodwork
All 8 markers tested: free testosterone, SHBG, prolactin, estradiol, thyroid, HbA1c, insulin, lipid panel, cortisol. Results in 5-7 days.
Step 2: Root Cause Identification
Your physician reviews results. Is your estradiol elevated (causing ED)? Is your prolactin high (suppressing libido)? Is your HbA1c prediabetic (damaging blood vessels)? Is your cortisol chronically elevated (exhausting testosterone)? The cause determines the protocol.
Step 3: Targeted Protocol
If your estradiol is elevated, you receive an aromatase inhibitor (under physician oversight). If prolactin is high, dopamine support. If HbA1c is prediabetic, metabolic intervention + metformin. If cortisol is elevated, stress management coaching + targeted supplementation. Protocol addresses your specific markers, not generic ED.
Step 4: Pharmaceutical-Grade Optimization
If erectile aids (sildenafil, tadalafil) are needed, your physician prescribes them with bloodwork context. But now you know why you need them — and whether the underlying cause is being addressed.
Step 5: Ongoing Monitoring
3-month follow-up bloodwork checks whether testosterone is rising, cortisol is normalizing, HbA1c is improving. Your protocol adjusts based on response. No fire-and-forget.
The difference: arq. treats the cause, not just the symptom. Most men don't need Viagra — they need insulin control, prolactin management, or stress reduction. Testing reveals which.
Symptoms: Can't maintain erections, low libido, fatigue.
Lab results: Total testosterone 550 ng/dL (normal), Free testosterone 6 pg/mL (low), SHBG 95 nmol/L (high), HbA1c 5.8% (prediabetic), Fasting insulin 18 mIU/L (insulin resistant), Estradiol 52 pg/mL (elevated).
Diagnosis: Insulin resistance + elevated estradiol + high SHBG = ED despite normal total testosterone.
Protocol: Metformin 500mg daily, low-glycemic diet, DIM (diindolylmethane) or Arimistane to lower estradiol, exercise 4x/week. Retest in 3 months. Probably won't need Viagra once metabolic health improves.
Symptoms: No desire to have sex, erections work fine when aroused, fatigue.
Lab results: Free testosterone 8 pg/mL (low-normal), Prolactin 28 ng/mL (elevated), TSH 5.2 mIU/L (subclinical hypothyroidism), Morning cortisol 22 mcg/dL (elevated).
Diagnosis: High prolactin + hypothyroidism + elevated cortisol = suppressed sexual desire despite functional erectile ability.
Protocol: Levothyroxine to normalize thyroid (often lowers prolactin), stress management, sleep optimization, cortisol-lowering supplement stack, possible dopamine agonist if prolactin doesn't normalize. Testosterone not needed — libido returns when prolactin and thyroid normalize.
Symptoms: Erectile dysfunction worsening over 2 years, shortness of breath with exertion.
Lab results: Total cholesterol 240 mg/dL, LDL 170 mg/dL, HDL 32 mg/dL, Triglycerides 320 mg/dL, HbA1c 6.2% (diabetic range), Free testosterone 7 pg/mL (low).
Diagnosis: Diabetes + severe dyslipidemia + vascular disease. ED is a warning sign of cardiovascular disease.
Protocol: Immediate referral to cardiologist. Meanwhile: statin therapy, GLP-1 agonist (semaglutide) for diabetes, TZD or metformin, low-carb diet, cardiac rehabilitation. Once metabolic health improves, may add testosterone. ED resolution tracks with cardiovascular improvement.
Sexual health starts with bloodwork. Low testosterone, high prolactin, thyroid dysfunction, insulin resistance, and vitamin D deficiency all impact libido, erections, and performance. Test before treating — ED pills mask the problem, they don't fix it.
| Biomarker | What It Tests | Impact on Sexual Health | Optimal Range |
|---|---|---|---|
| Free Testosterone | Bioavailable testosterone | Drives libido, erection quality, sexual endurance | 8–25 pg/mL |
| SHBG | Testosterone-binding protein | High SHBG binds testosterone, reduces availability | 24–122 nmol/L |
| Prolactin | Pituitary hormone | Suppresses libido, causes ED and breast tenderness | 2–18 ng/mL |
| Estradiol | Female sex hormone (in men) | Too high or low impairs erectile function | 20–40 pg/mL |
| TSH | Thyroid-stimulating hormone | Hypothyroidism = low libido; hyperthyroidism = ED | 0.5–4.5 mIU/L |
| HbA1c | 3-month glucose average | Prediabetes damages blood vessels, causes ED | <5.7% |
| Vitamin D | Cholecalciferol (hormone) | Deficiency linked to low testosterone and ED | 30–100 ng/mL |
| Lipid Panel | Total, LDL, HDL, Triglycerides | Abnormal lipids damage penile arteries | Total <200, LDL <100, TG <150 |
No AI chat. No templates. A specialist reads your panel against South Asian-calibrated ranges and writes the protocol on a 15–20 minute video consult — inside 7 days of your home draw.