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Does ejaculation affect blood test accuracy?

This Premium Q&A, reviewed and published, features a real conversation between an iCliniq user and a physician.

Patient's Query

Hi doctor,

I was about to get a complete blood test done to check certain parameters. I have attached the screenshot of the parameters.

I wanted to know if I had masturbated before 36 hours of these tests, then would the results be adversely affected?

If so, how many hours should lapse after I last masturbate to get these tests done?

Kindly suggest.

Answered by Dr. Yashas Saipangallu

Education:

MBBS

Professional Bio:

Dr. Yashas Saipangallu is a General Practitioner and a Family Physician with 10 years of clinical experience. He completed his MBBS from the Rajiv Gandhi University of Health Sciences in 2013. He treats all kinds of general and emergency conditions. He is currently working in Karnataka.

This doctor is not available for online consultations on the platform anymore.

Hi,

Welcome to icliniq.com.

Based on the information given by you, it suggests that you are overweight.

Masturbation can cause certain biochemical changes if it is tested very soon after ejaculation or at the time of orgasm. But, hardly any changes will be seen after such a long gap of 36 hours.

Recent studies show that testosterone levels hardly alter after masturbation due to various reasons.

Based on attached file (attachment removed to protect patient identity) it can be concluded that your test results will hardly show any significant changes as masturbation is done 36 hours before.

Regards.

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Patient's Query

Hi doctor,

Thank you for the reply.

Do I need to stop using my vitamin B12 and D supplements before the test?

Kindly help.

Answered by Dr. Yashas Saipangallu

Education:

MBBS

Professional Bio:

Dr. Yashas Saipangallu is a General Practitioner and a Family Physician with 10 years of clinical experience. He completed his MBBS from the Rajiv Gandhi University of Health Sciences in 2013. He treats all kinds of general and emergency conditions. He is currently working in Karnataka.

This doctor is not available for online consultations on the platform anymore.

Hi,

Welcome back to icliniq.com.

  1. May I know why are you on supplements of vitamin B12 and D?
  2. Do you have any health related issues associated with it?
  3. Are you undergoing blood tests for any specific medical indications? What are your health issues?

Consumption of vitamin B12 or vitamin D hardly alters your blood testing reports unless we are testing for the same in your blood. Hence, you need not stop it since there will not be any significant changes in the blood reports.

If you are anemic (low hemoglobin) secondary to vitamin B12 deficiency, then consumption of vitamin B12 for a prescribed time may show some improvements.

If you are suffering from low vitamin D, and consumption of vitamin D supplements as prescribed may show some improvements in vitamin D values.

Other blood parameters may hardly show any significant changes with supplements of vitamin B12 and D.

Regards.

Medically reviewed by iCliniq medical review team
Published At October 4, 2017
Reviewed At November 6, 2025

Education:

MBBS

Professional Bio:

Dr. Yashas Saipangallu is a General Practitioner and a Family Physician with 10 years of clinical experience. He completed his MBBS from the Rajiv Gandhi University of Health Sciences in 2013. He treats all kinds of general and emergency conditions. He is currently working in Karnataka.

This doctor is not available for online consultations on the platform anymore.

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Education:

MBBS

Professional Bio:

Dr. Yashas Saipangallu is a General Practitioner and a Family Physician with 10 years of clinical experience. He completed his MBBS from the Rajiv Gandhi University of Health Sciences in 2013. He treats all kinds of general and emergency conditions. He is currently working in Karnataka.

This doctor is not available for online consultations on the platform anymore.

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