New Research Highlights Avocado Leaves and Their Role in Healthy Blood Pressure

Most people know the avocado for its creamy fruit, healthy fats, and delicious toast toppings. But researchers are increasingly discovering that another part of the tree may be just as interesting: the leaves.

A new 2026 study published in the South African Journal of Botany explored the natural compounds found in avocado leaves and their potential role in supporting heart health — particularly healthy blood pressure levels.

For those who enjoy avocado leaf tea, the findings are especially exciting.

Why Scientists Are Studying Avocado Leaves

Avocado trees produce a large amount of leaves, and historically many cultures have used them in herbal infusions and traditional remedies.

Modern research is now exploring the chemistry behind these traditional uses.

Avocado leaves contain several natural plant compounds known as polyphenols and flavonoids, which are widely studied for their antioxidant and cardiovascular benefits. These phytochemicals help plants defend themselves and may also support human health by helping the body manage oxidative stress.

Pulp-Leaf-Peel

Among the compounds identified in avocado leaves are:

• rutin

• quercetin derivatives

• luteolin

• astragalin

• coumarin

These flavonoids are commonly found in heart-healthy plant foods and herbal teas.

Strong Antioxidant Activity Found in Avocado Leaves

In the study, scientists measured how well avocado leaf extracts could neutralize free radicals.

Free radicals are unstable molecules that contribute to oxidative stress, which is associated with aging and many chronic health conditions.

Using standard antioxidant tests, the researchers found that avocado leaf extracts showed strong antioxidant activity, indicating that the leaves are rich in protective plant compounds.

Potential Support for Healthy Blood Pressure

The most interesting part of the study focused on ACE inhibition.

ACE stands for Angiotensin Converting Enzyme, which plays an important role in regulating blood pressure.

Many prescription blood pressure medications work by blocking this enzyme.

When researchers tested avocado leaf extracts in the lab, they found that certain extracts could strongly inhibit ACE activity. In fact, the most concentrated extract inhibited ACE activity by over 86% in laboratory testing.

Computer modeling of the plant compounds also showed that several flavonoids from avocado leaves may interact directly with the ACE enzyme.

This helps explain why avocado leaves have been traditionally used in herbal preparations related to cardiovascular wellness.

What About Avocado Leaf Tea?

In the study, scientists used several different extraction methods to analyze the leaves.

They tested extracts made with:

• 96% ethanol

• 70% ethanol

• water

The 70% ethanol extract showed the strongest activity, because alcohol-based extractions can pull more compounds from plants.

However, water extracts — which resemble how avocado leaves are traditionally consumed as tea — still contained beneficial antioxidants and flavonoids.

This is a common pattern in plant research: laboratory extracts are stronger because they are concentrated, but tea remains one of the oldest and simplest ways to enjoy the plant’s natural compounds.

Why Herbal Teas Continue to Be Studied

Plant-based teas have been used around the world for centuries as part of daily wellness routines.

Today, scientists are taking a closer look at these traditions to understand the compounds behind them.

The avocado leaf is particularly interesting because research suggests it may contain compounds that support:

• antioxidant defense

• cardiovascular wellness

• metabolic balance

Because of these properties, researchers believe avocado leaves could eventually be used in functional foods and botanical health products.

A Simple Tradition With Modern Interest

While research on avocado leaves is still growing, studies like this one help highlight why traditional plant infusions remain so popular today.

For many people, a cup of tea is more than just a beverage — it’s a daily ritual.

And sometimes the most interesting discoveries come from parts of nature we once overlooked.

✔ rich in plant polyphenols
✔ naturally caffeine-free
✔ traditionally brewed as herbal tea

Avocado leaves are proving to be a fascinating subject for modern plant science — and a comforting cup of tea along the way.

Read Full Study HERE