The Antioxidant Power of Grapes and Heart Health

The grape is a fruit known for its delicious taste and nutritious properties. Rich in antioxidants, vitamins and minerals, grapes are an important part of a healthy diet. Grapes attract attention not only for their flavour but also for their possible links with heart health, because the benefits of grapes for the heart that are discussed are quite varied.

Grapes and Antioxidants

Antioxidants are compounds that help protect the body from the harmful effects of free radicals. Free radicals can cause cell damage and can be triggers of many chronic diseases, ageing and inflammation. The benefits of grapes for the heart are therefore discussed in connection with these antioxidants.

Grapes contain a range of compounds that are rich in antioxidants. These compounds include:

• Resveratrol: resveratrol, a polyphenol found in the skins and seeds of grapes, has anti-inflammatory and antioxidant properties. It is also known for its blood-vessel-widening effects, which are being studied in relation to heart health.
• Quercetin: quercetin, a flavonoid, is another antioxidant found in grapes. Linked with anti-inflammatory effects, quercetin is a compound that is being studied for its role in heart health.

What Are the Effects of Grapes on Heart Health?

The possible benefits of grapes for the heart are quite varied. They include:

• Antioxidant content: grapes contain an antioxidant called resveratrol in particular. This substance is being studied for a number of possible effects on heart health. Antioxidants can help reduce cell damage by neutralising free radicals in the body.
• Cholesterol levels: various studies have suggested that eating grapes and grape products may influence cholesterol levels. Resveratrol in particular has been studied for its possible effect on LDL ("bad") and HDL ("good") cholesterol. Ask your doctor about your own cholesterol levels.
• Blood pressure: some research suggests that eating grapes and drinking grape juice may influence blood pressure. This is an important factor for people with hypertension, who should follow the advice of their doctor.
• Endothelial function: the endothelium is the layer of cells lining the inside of blood vessels. Eating grapes may support endothelial function and vessel health, including the widening of blood vessels and the regulation of blood flow.
• Anti-inflammatory effects: the antioxidants in grapes may help reduce inflammation in the body. Chronic inflammation can increase the risk of heart disease, so anti-inflammatory effects matter for heart health.
• Diabetes risk: diabetes is a factor that can increase the risk of heart disease. Some studies have suggested that eating grapes may be linked with a lower risk of type 2 diabetes.

However, it should be remembered that grapes and other fruits should be part of a healthy diet as a whole. Balanced and varied eating is an important part of supporting your overall health.

Different Types of Grape and Their Benefits

There are many types of grape. The commonly known types and their benefits are:

• Red grapes: red grapes are known especially for their resveratrol content, found in the skin. This antioxidant has the potential to support heart health.
• White grapes: white grapes are rich in antioxidants and vitamin C. Vitamin C supports the normal function of the immune system and helps protect cells.
• Purple grapes: purple grapes generally contain more resveratrol, so their possible effects on heart health are more marked.
• Seeded grapes: the antioxidant effects of seeded grapes can be greater thanks to the polyphenols in their seeds. They are also rich in fibre, so they support digestive health.

Things to Consider When Eating Grapes

Although the benefits of grapes for the heart are varied, there are points to bear in mind when eating grapes. They are:

• Choose organic grapes where you can.
• Eating seeded grapes provides extra nutritional value, so do not remove the seeds.
• Coloured grapes contain more antioxidants. Purple grapes generally contain more resveratrol.
• Be careful with grape juice, because in this form the sugar content is more concentrated.
• Include a variety of foods, including grapes of different colours and types, in your diet.

This article is for general information only; please consult your doctor and dietitian about your own situation.