Best Tea for Heart Health: 3 Options

Green tea, black tea and hibiscus tea are practical choices for heart health, but no tea is proven to prevent heart disease. Unsweetened tea can be part of a heart-healthy eating pattern; it is not a substitute for medical care. For a broader comparison, see the best drinks for heart health.

3 teas to consider for heart health

The ai symptom analyzer is not a diagnostic tool and should not delay medical or emergency care.

These are three practical options, not a proven ranking of which tea protects the heart most. Green tea has relevant laboratory research, while black tea and hibiscus offer different flavor and caffeine choices. The studies we found do not establish that any of the three prevents heart attacks or strokes.

Caffeine content varies by product and preparation. Check the label if you need a caffeine-free drink: a blend containing hibiscus can also contain caffeinated tea.

Green tea

Green tea contains plant compounds called catechins. Researchers are interested in whether these compounds affect inflammation and the lining of blood vessels, processes involved in the development of cardiovascular disease.

Strength of evidence: A review of tea catechin research describes effects in cells and mice, including research using catechin extracts. Those results are preliminary and do not show that brewed green tea prevents heart disease in people. They also do not establish an effective daily amount.

How to brew:

• 1 green tea bag
• 1 cup (240 mL) hot water

1. Pour the hot water over the tea bag.
2. Steep for about 2–3 minutes, or follow the package directions, then remove the bag.

Drink it unsweetened if you enjoy the flavor. Green tea can taste bitter if brewed for longer, so adjust the steep to your preference rather than assuming a stronger cup is better for your heart.

Caution: Regular green tea contains caffeine, which can cause palpitations or disturb sleep in some people. If you take warfarin, ask the clinician managing it about a consistent intake of green tea and before using concentrated green tea products; do not change your medication on your own.

Black tea

Black tea comes from the same plant as green tea but is processed differently. It contains flavonoids, plant compounds of research interest for blood vessel health. That does not mean a cup of black tea has been shown to produce a particular cardiovascular effect.

Strength of evidence: The human studies we found examined tea consumption generally rather than establishing a benefit for black tea specifically. In a Scottish follow-up study, associations between tea drinking and heart outcomes were no longer apparent after adjustment for other risk factors. A separate cross-sectional study also found that adjustment changed the relationship observed with tea. These observational studies cannot prove that tea caused either benefit or harm.

How to brew:

• 1 black tea bag
• 1 cup (240 mL) freshly boiled water

1. Pour the water over the tea bag.
2. Steep for about 3–5 minutes, or follow the package directions, then remove the bag.

Choose plain black tea if you want to control what goes into the cup. A splash of milk is a matter of preference; heavily sweetening the tea adds sugar without establishing an additional heart benefit.

Caution: Black tea contains caffeine. If it triggers a racing heartbeat, makes sleep difficult or conflicts with advice you have received for a heart rhythm condition, discuss your intake with your clinician. Decaffeinated black tea is an option if you prefer its flavor but need less caffeine.

Hibiscus tea

Plain hibiscus tea is made from the dried parts of the hibiscus flower. It provides a tart flavor and is naturally caffeine-free, making it an option for someone who wants a tea-like drink without the caffeine in green or black tea.

Mechanism and strength of evidence: Research has not established a mechanism for a heart benefit from hibiscus tea. No hibiscus study was included in that evidence, so its effects on blood pressure or heart outcomes cannot be ranked against those of other teas here. Do not use it in place of prescribed blood pressure treatment.

How to brew:

• 1 hibiscus tea bag
• 1 cup (240 mL) freshly boiled water

1. Pour the water over the tea bag.
2. Steep for about 5–7 minutes, or follow the package directions, then remove the bag.

Look for plain hibiscus on the ingredient list. Some blends include other herbs, added sweeteners or caffeinated tea, so the name on the front of the package may not tell you everything in the cup.

Caution: If you have low blood pressure or take medicines for blood pressure, ask your clinician or pharmacist before drinking hibiscus tea regularly. Discuss herbal products first if you are pregnant, breastfeeding or giving them to a child; ingredients and their effects can vary.

Which teas should you avoid for heart health?

Avoid treating concentrated tea extracts, capsules or heavily marketed “heart” blends as substitutes for ordinary brewed tea or prescribed care. A supplement can deliver a different amount or combination of ingredients from a cup of tea, and laboratory findings about extracts do not establish that the finished product is safe or effective.

Be cautious with products labeled “detox” or “weight loss,” especially blends with unclear ingredients or stimulant claims. They may contain caffeine or other active substances that are difficult to assess from the product name. Check the full label and ask a pharmacist about possible interactions with your medicines.

If caffeine brings on palpitations or worsens sleep, avoid the particular caffeinated tea or product that causes problems and discuss recurrent symptoms with a clinician. People who have been told to limit caffeine for a heart rhythm condition should follow their individual care plan rather than using this list to decide what is safe.

Sweetened bottled teas and tea drinks can add substantial sugar. Choose an unsweetened version when possible, and check the label rather than assuming a drink is low in sugar because it contains tea. There is no evidence in the studies reviewed here that adding more sugar improves tea’s effects on the heart.

Who should be careful, and when should you see a doctor?

Talk with your clinician or pharmacist before making tea or herbal products a regular part of your routine if you have a heart rhythm disorder, heart failure, low blood pressure or another cardiovascular condition. This is especially important if you take warfarin or another blood thinner, blood pressure medicine, a diuretic or medicine for your heart rhythm. Ask about your particular product: an herbal blend or extract may differ from plain brewed tea.

If you are pregnant or breastfeeding, ask your maternity care clinician about caffeine and herbal teas. Check with a child’s clinician before offering herbal teas or caffeinated drinks. Do not stop or adjust a prescribed medicine because you have started drinking tea.

Get emergency help immediately for new or worsening chest pain or pressure, pain spreading to the arm, back or jaw, sudden severe shortness of breath, or fainting. Cold sweat or nausea with chest discomfort can also be a warning sign. Call local emergency services rather than using a symptom tool or waiting to see whether tea helps.

Arrange a medical appointment for recurring palpitations, concerning blood pressure readings or other persistent symptoms, even if they seem mild. A clinician can assess your risk and treatment needs. Tea can fit alongside established care, including the medicines and lifestyle changes your clinician recommends; it cannot replace them.