Educational information, not medical advice — ask your doctor or midwife.
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Hai Ma is a dried seahorse. It is used as a single herb in Traditional Chinese Medicine, which means it is one substance on its own, not a fixed formula. Its plain English name is simply Seahorse.
TCM doctors treat it as a warming tonic. They use it for low sex drive, trouble getting an erection, long-term wheezing, tiredness, and a weak or sore lower back.
Here is the short verdict on proof. The traditional record is long, but human trial data is close to none. Long use in a tradition is not proof that a remedy works, and that point applies to this whole page, so we say it once here.
The honest answer is that no one has shown how Hai Ma works in the human body.
In TCM theory, it is said to warm and lift "kidney yang". That is a traditional idea about the body's warmth, drive and sexual energy. It is not a body part you can see on a scan.
Lab and animal studies offer some clues. Extracts of seahorse have been reported to raise male hormone levels in rodents and to calm swelling in test tubes. Some extracts also slowed blood clotting in the lab.
None of this has been repeated in people. Treat every idea about how it works as unproven.
You may meet Hai Ma in these forms:
Whole dried seahorse, sold by the piece or by weight. It is usually roasted or toasted first, then ground.
Fine powder, taken by the spoonful in warm water or in capsules.
Soaked in rice wine or spirit to make a medicinal wine.
Added to a decoction, which is a herb soup boiled from several herbs together.
Built into ready-made Chinese patent pills sold for male sexual complaints.
Whole seahorse is sold under wildlife trade rules in most countries. Some products sold online are fake, mislabelled or contaminated.
Seahorse appears in Chinese medical writing from about the 8th century, in the Tang dynasty text Ben Cao Shi Yi. Li Shizhen listed it again in his Bencao Gangmu in 1596.
It has stayed a well-known tonic in China, Korea and parts of Southeast Asia. It was often kept for men's complaints and for slow, difficult childbirth.
Wild seahorses are now under pressure from fishing. Trade is limited by CITES, an international treaty that protects wild species.
See a doctor promptly if you get a rash, itching, swollen lips or face, or any trouble breathing after taking it. That can be an allergic reaction, and it needs urgent care.
Book an appointment if you notice easy bruising, bleeding gums, blood in your urine or stool, or black stools.
Get checked rather than self-treating if erection problems or wheezing are new or getting worse. Both can point to heart or lung disease that needs proper treatment.
Tell your doctor and pharmacist that you are taking a Chinese herb, especially before any operation.
Evidence grades and traditional-use labels are explained in our methodology. Nothing here is medical advice.
Reviewed by the HealisticMD editorial team How we grade evidence →
The published evidence for Hai Ma is weak or absent. That usually means no controlled trial has tested it, not that a trial found it ineffective — the two are different, and we grade only what has been published.
What it is typically used for, usual dose, cautions, and the study behind it where real trial data exists.
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