'Ejaculation does not deplete the volume of blood of men' - National Blood Service
August 27, 2026 · by CEO Rafamall
The National Blood Service (NBS) states that ejaculation does not deplete a man's blood volume. Claims equating seminal fluid to a pint of blood are scientifically inaccurate. Ejaculation involves 2-5 millilitres of fluid, not blood, and does not impact systemic blood levels. This clarification aims to prevent public confusion regarding blood donation and sexual health.
In its statement, the NBS said that the claims of the CEO were scientifically inaccurate and potentially harmful to public understanding of blood donation, sexual health and prostate-related conditions.
The National Blood Service (NBS) has refuted claims that ejaculation by men during sexual activities reduces their blood level.According to a report by myjoyonline, the service, in a statement issued on August 20, indicated that the assertion of blood loss during ejaculation was completely false.
The statement by the NBS was in reaction to a claim by the Chief Executive Officer of Chartma Herbal Health Centre, Dr Charity Twumasi, that a single ejaculation released “400 million cells” and equated the volume of seminal fluid to “one pint of blood”.
Dr Twumasi also claimed that regular sexual intercourse could result in life-threatening blood loss.
In its statement, the NBS said that the claims of the CEO were scientifically inaccurate and potentially harmful to public understanding of blood donation, sexual health and prostate-related conditions.
“No Circulatory Depletion: Blood is contained strictly within the circulatory system. Ejaculation does not deplete, draw from, or impact systemic blood volume. Standard sexual activity causes absolutely zero blood loss,” the service is quoted to have said.
It further stated that the claim that some amount of ejaculation is equivalent to a volume of blood loss is false because there is no comparison between the volume of an ejaculation and a pint of blood.
It explained that even though ejaculation contains millions of microscopic sperm cells, the total volume of seminal fluid is usually between 2 and 5 millilitres, which is way less than the volume of one pint of blood, approximately 473 millilitres.
The service urged the public to desist from making such claims because it “could also have wider public health consequences by confusing the public about how blood volume is lost or replenished, potentially undermining voluntary blood donation campaigns.”
Frequently asked questions
Does ejaculation reduce a man's blood volume?
No, the National Blood Service (NBS) confirms that ejaculation does not deplete or impact systemic blood volume. Blood is contained strictly within the circulatory system.
How much fluid is released during ejaculation?
The total volume of seminal fluid released during ejaculation is typically between 2 and 5 millilitres.
Is seminal fluid the same as blood?
No, seminal fluid is distinct from blood. It contains millions of microscopic sperm cells and other fluids, but it is not blood and does not draw from the circulatory system.
Why is this clarification important for public health?
This clarification is crucial to prevent public confusion about how blood volume is lost or replenished, which could undermine voluntary blood donation campaigns and spread misinformation about sexual health.
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