This blood type may raise your risk of early stroke, study finds

Written by: Dr Subita Alagh Reviewed by: Dr. Swati Mishra 9 July 2025

[{"selector":"#anim-83f9ee70-0f88-4a9c-9b93-ac795c6d3957","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-a4cbcd12-7e47-497f-94a0-56a668ffba82","keyframes":{"transform":["translate3d(0px, 139.1933%, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] New research shows a surprising connection between blood type and early-onset stroke. Here's what you need to know. Photo Credit: Freepik

What Is a Stroke?

[{"selector":"#anim-9a806398-38d2-4084-a867-3b1ba584719d","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-68daba0b-0bd8-4088-9932-90415093029f","keyframes":{"transform":["translate3d(0px, 138.14166%, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-f70005f5-1ab2-4089-900f-6ccd7c265341","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-54ff7940-ed06-42a8-8cc0-9091c43a18a5","keyframes":{"transform":["translate3d(0px, 714.11361%, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] A stroke happens when blood flow to the brain is blocked often by a clot leading to brain damage. It can cause paralysis, memory loss, or even death. Photo Credit: Freepik

A Growing Concern

[{"selector":"#anim-843a6dc5-9ba8-4548-905a-ac949e6ef767","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-aa2c6c1b-2da8-40d0-91ac-aebd0115c48b","keyframes":{"transform":["translate3d(0px, 138.14166%, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-50cb7c06-a7cd-44c4-bb34-df4688a51be8","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-8cb66607-5b41-417c-ab6d-758b9fedd4ba","keyframes":{"transform":["translate3d(0px, 716.81627%, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] Most strokes happen after 60, but some occur earlier. A new study looked at an early-onset stroke due to genetic factors before age 60. Photo Credit: Freepik

The Study at a Glance

[{"selector":"#anim-fcc41b98-8f78-4973-a015-bee25cbb8a30","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-cf13f9c7-71b4-4493-84c1-a197a34c4533","keyframes":{"transform":["translate3d(0px, 126.0101%, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-af17f730-1f95-4d51-8e2f-25a3552f232d","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-87317146-c87e-4059-bfb6-2c8eba707c00","keyframes":{"transform":["translate3d(0px, 819.51893%, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] A large analysis of 48 genetic studies involving around 17,000 stroke cases found that people with blood group A had a 16% higher risk of early stroke, while those with blood group O had a 12% lower risk. Photo Credit: Freepik

Why Blood Type A Might Be Riskier

[{"selector":"#anim-faba65ce-74be-4d8f-b08e-b64fe552ab10","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-392fa711-d846-4ce1-8836-cab8cd6af000","keyframes":{"transform":["translate3d(0px, 121.91917%, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-c00e1b6a-b234-4c64-b05a-a0cecc67bdc2","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-ebc43b4f-b0fc-4efb-822e-d48029d75526","keyframes":{"transform":["translate3d(0px, 500.33188%, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] This risk is linked to clotting-related factors, blood type A may affect how easily blood clots form, which can increase stroke risk in younger adults. But more studies are required to confirm the same. Photo Credit: Freepik

What This Doesn't Mean

[{"selector":"#anim-a7435775-d63b-462b-9bc8-32d4ceeea1ff","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-51befaad-786d-4449-a67f-ae824938f70a","keyframes":{"transform":["translate3d(0px, 167.27547%, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-7efe7ab6-0948-4e2d-859f-c18357b1bb8d","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-8fa04da8-24a9-43f2-a0d7-9769e8e2e718","keyframes":{"transform":["translate3d(0px, 452.5707%, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] This doesn’t mean everyone with type A blood will have a stroke. It only points to a modest increase in relative risk, not a cause. Photo Credit: Freepik

What This Doesn't Mean

[{"selector":"#anim-3d20a101-db99-491c-9b99-faea8f4794f4","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-1b80d66c-e749-490f-b2e9-51026d93b7cd","keyframes":{"transform":["translate3d(0px, 167.27547%, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-c864a026-da44-4c69-a8f4-e08f2eff894d","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-d0a66103-fe69-45a7-984a-7cc7b7bca89c","keyframes":{"transform":["translate3d(0px, 452.5707%, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] This doesn’t mean everyone with type A blood will have a stroke. It only points to a modest increase in relative risk, not a cause. Photo Credit: Freepik

Know What You Can Do

[{"selector":"#anim-1e95e795-570b-4e51-92fb-447a143d0d2d","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-6d928f17-0654-461b-8d9f-a67d6188d5a4","keyframes":{"transform":["translate3d(0px, 126.0101%, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-20bf354c-d65b-46fd-b6a7-87b00db5e181","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-387ea2aa-8b9a-4131-a5e8-3dc4824f638f","keyframes":{"transform":["translate3d(0px, 491.37659%, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] Keep these key risk factors under control: ✅ Blood pressure ✅ Diabetes ✅ Cholesterol ✅ Smoking ✅ Obesity ✅ Exercise & diet Photo Credit: Freepik

Rememeber

[{"selector":"#anim-1faa760a-32c4-458b-90a0-8aa297d6d459","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-fb834c6c-df3a-4b9b-bf5d-f7749f1f3dce","keyframes":{"transform":["translate3d(0px, 189.87822%, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-6ff978c9-bf01-42a2-bef8-e5ca5ff41f9c","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-4f477e64-bf2d-4420-975f-2cf624dc8e82","keyframes":{"transform":["translate3d(0px, 889.78898%, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] Your blood type is unchangeable, but your habits aren’t. Take charge of your health and lower your risk, starting today. Photo Credit: Freepik

[{"selector":"#anim-7185fb42-a40b-4880-8e43-754e8f36291c","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-9a0565a1-db5b-4e0a-a944-10568cfa4d48","keyframes":{"transform":["translate3d(0px, 205.63163%, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-d77a61a4-a464-4cc8-a1e3-cc56ef5b9bbd","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-f6d12cad-c255-4fae-aad0-148ac024905e","keyframes":{"transform":["translate3d(0px, 725.46302%, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] Know your blood type with a simple test, it’s quick, easy, and may help you understand your risk of stroke. Photo Credit: Freepik Know Your Blood Type

This blood type may raise your risk of early stroke, study finds

What Is a Stroke?

A Growing Concern

The Study at a Glance

Why Blood Type A Might Be Riskier

What This Doesn't Mean

What This Doesn't Mean

Know What You Can Do

Rememeber

6 diet habits to keep your heart happy & healthy

Up Next