What are the best labs for thyroid testing in Delhi?

For thyroid testing, prioritise NABL accreditation first — it means the lab's testing process is independently audited for accuracy, which matters a lot for TSH results since small variations change the clinical picture. On LabDekho, Dr. Lal PathLabs and Apollo Diagnostics both carry NABL (plus CAP/NABH) accreditation in Delhi and offer home collection, so either is a safe choice for a standard Thyroid Profile (T3, T4, TSH). A few practical tips: get tested in the morning if possible, avoid biotin supplements for 48 hours before the test (they can skew TSH readings), and if you're already on thyroxine, take the test before your morning dose. If your TSH comes back outside 0.4–4.0 mIU/L, follow up with an endocrinologist rather than adjusting medication on your own.

Adding to this — I've used Apollo Diagnostics' home collection twice in Delhi for the same test and the phlebotomist arrived on time both times, results came back on the app within a day. Worth checking if your locality is in their home-collection zone before booking.