Book Homocysteine Test: Purpose, Normal Range and Price

The Homocysteine test is a blood test that measures the level of homocysteine, an amino acid produced as a byproduct of metabolising methionine, a protein found in meat, eggs, and dairy. Under normal conditions, homocysteine is converted into harmless substances with the help of vitamin B6, B12, and folate. When these vitamins are deficient or certain genetic enzyme defects are present, homocysteine accumulates in the blood, a condition called hyperhomocysteinaemia. Elevated homocysteine is an independent risk factor for cardiovascular disease including heart attack and stroke. It damages blood vessel walls, promotes abnormal clotting, and accelerates atherosclerosis. In India, where heart disease strikes at a younger age than in Western populations, and where B12 and folate deficiency are widespread particularly among vegetarians, the Homocysteine test is an increasingly critical tool for identifying hidden cardiovascular risk. Beyond heart disease, elevated homocysteine is linked to cognitive decline, deep vein thrombosis, recurrent pregnancy loss, and chronic kidney disease. The test involves a simple blood draw completed in under five minutes.

Doctors prescribe a Homocysteine test in the following situations: Assessing cardiovascular risk in patients with a family history of early-onset heart disease or stroke, particularly when cholesterol and blood pressure are normal but deeper risk assessment is warranted. Investigating premature heart attacks or strokes in patients below 50 years of age where B vitamin deficiency or genetic enzyme defects may be the underlying cause. Evaluating vitamin B12 and folate deficiency as a cause of elevated homocysteine, especially relevant in vegetarian and elderly patients in India who are at high risk of B12 deficiency. Investigating deep vein thrombosis or pulmonary embolism in younger patients or those with recurrent clotting events without an obvious explanation. Evaluating recurrent pregnancy loss in women, as elevated homocysteine is associated with placental dysfunction, miscarriage, and adverse outcomes including preeclampsia. Assessing cognitive decline and memory complaints in patients where elevated homocysteine has been associated with accelerated brain atrophy and increased Alzheimer's risk. Monitoring patients with chronic kidney disease where impaired renal clearance causes homocysteine to accumulate, significantly increasing cardiovascular mortality in this group.

The Homocysteine test measures total homocysteine concentration in the blood, reported in micromoles per litre (umol/L). Normal Homocysteine Range in India A homocysteine level below 15 umol/L is considered within the acceptable range for adults. Many cardiologists recommend an optimal target below 10 umol/L for patients with existing heart disease or multiple risk factors. Interpreting Homocysteine Results A level between 15 and 30 umol/L indicates mild hyperhomocysteinaemia, most commonly caused by B12, folate, or B6 deficiency. This is the most correctable and frequently encountered elevation in clinical practice. A level between 30 and 100 umol/L indicates moderate hyperhomocysteinaemia, where nutritional deficiency combined with possible enzyme defects or renal impairment is investigated. Cardiovascular and thrombotic risk is significantly elevated at this range. A level above 100 umol/L indicates severe hyperhomocysteinaemia, most commonly seen in homocystinuria, a rare inherited metabolic disorder, and requires urgent specialist evaluation.

Fasting for 10 to 12 hours before the test is recommended for the most accurate result. You may drink water normally during the fasting period. Our team confirms preparation requirements at the time of booking. Avoid consuming coffee before sample collection on the day of the test, as caffeine can transiently raise homocysteine levels. Inform the phlebotomist about all medications you are currently taking. Methotrexate, phenytoin, metformin, and trimethoprim can interfere with B vitamin metabolism and raise homocysteine levels. Do not take B12, folate, or B6 supplements on the day of the test unless advised by your doctor, as these can temporarily lower homocysteine and mask a true deficiency. Stay normally hydrated before sample collection.

If you are booking through the SecondMedic platform the Homocysteine test price starts at approximately Rs. 1,255. The exact price will be confirmed at the time of booking through SecondMedic. If your doctor has prescribed multiple tests alongside Homocysteine, SecondMedic health packages include Homocysteine as part of a broader cardiovascular risk or vitamin deficiency panel at a significantly lower combined price.

SecondMedic provides home sample collection for Homocysteine test across all major areas. You do not need to visit a lab or collection centre. A certified and trained phlebotomist comes to your home or workplace at your chosen time, collects the sample using sterile single-use equipment, and ensures it is transported to the NABL-accredited lab within the required time window for accurate processing. Please note that SecondMedic provides free home sample collection on all tests priced above Rs. 300. Our team will check your pincode and confirm if your address falls under our free sample collection eligibility criteria, which depends upon the lab location and phlebotomist availability. Home collection is available between 7 AM and 10 PM, seven days a week, including Sundays and public holidays. Enter your pincode on the booking page or call our helpline to confirm availability at your address.