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Apples are a staple in many home-support kitchens. Here is a balanced look at their nutrients, the research behind their reputation and how to fit them into daily meals.

A familiar fruit in home-support kitchens

Apples turn up often when our support workers help clients in Sydney plan meals and shop for groceries. They keep well in the fruit bowl, need no cooking and can be prepared in ways that suit different needs, from thin slices for someone who finds chewing tiring to stewed apple stirred through morning porridge. But does the fruit really live up to its famous reputation? Here is a balanced look.

What is inside a medium apple

Nutrition data for one medium-sized apple lists roughly:

• 95 calories
• 25 grams of carbohydrate
• 4.5 grams of fibre
• vitamin C at about 9% of the Daily Value
• copper at about 5% of the Daily Value
• potassium at about 4% of the Daily Value
• vitamin K at about 3% of the Daily Value

Vitamin C works as an antioxidant, and the body relies on it for a range of routine tasks. Apples also supply plant compounds, including quercetin, caffeic acid and epicatechin, that scientists are still investigating.

Reading the research with care

Much of what you read about apples comes from observational studies. These track what large groups of people eat and compare it with their health over time. They can reveal patterns, but they cannot show that one food causes a particular outcome, because people who eat plenty of fruit often differ from others in many other ways too.

Heart and circulation

In a study involving more than 20,000 adults, higher consumption of white-fleshed produce, apples among them, went along with lower stroke rates. Researchers have suggested that flavonoids and soluble fibre could be part of the explanation, though that remains under investigation.

Cancer studies

A review pooling 41 studies noted lower lung cancer rates among people eating more apples, and separate work reported a similar pattern for colorectal cancer. Broader research on diets rich in fruit and vegetables points the same way. Scientists stress that more work is required and that other factors may explain the link, so apples are not a cancer prevention strategy.

Further areas of interest

• The fibre in apples may help some people feel full, which can be handy when planning snacks.
• Researchers are exploring whether eating more fruit relates to bone mineral density.
• Animal studies have examined apples and oxidative stress in the brain, but human evidence is lacking.
• Some studies have noted fewer cases of asthma among people who eat more apples.
• A large review observed lower rates of type 2 diabetes among daily apple eaters compared with people who ate none, without showing cause and effect.

Where the saying came from

The rhyme we know today was coined in 1913, but it grew from an 1866 Pembrokeshire proverb. That earlier version, printed in Notes and Queries magazine, recommended an apple at bedtime to stop the doctor from “earning his bread”. Interestingly, studies have not found that apple eaters actually visit the doctor less often.

Making it work at home

An apple can be a simple, affordable addition to a varied diet. If you or someone you care for has diabetes, swallowing difficulties or other health needs, ask a GP or dietitian how fruit fits into an eating plan, and let your support team know so meals can be prepared to match.