Tea scientist Dr Tim Bond and dietitian Dr Carrie Ruxton explain how tea may support health throughout life, from providing fluoride for children’s teeth and potentially improving concentration in teenagers and students, to supporting healthy blood vessel function in your 30s.
Emerging research is exploring its influence on gut bacteria in your 40s, while studies link tea drinking with lower diabetes risk in your 50s and better cognitive health in later life.
A new UK-wide survey of 1,000 adults reviewed by the Tea Advisory Panel (TAP) has found that younger people are just as enthusiastic about a cuppa as older generations. Among 18–29-year-olds, the ideal daily intake is reported to be four cups a day, compared with more than five cups among middle-aged adults.
Health matters too. Nearly three quarters (73%) of those polled agreed that regular tea drinking can help keep the heart healthy, with younger adults just as likely to believe this as older people. More than half, 53%, associate tea with antioxidants, suggesting that awareness of tea’s bioactive compounds is already widespread. People in the survey also ranked tea as delivering more health benefits than broccoli, berries and apples.
TAP member and dietitian Dr Carrie Ruxton says: “Tea provides plant bioactive compounds called polyphenols, alongside fluid for hydration. A regular cuppa can fit into a healthy diet and provide health and wellness help across the lifespan, with research pointing to benefits for concentration and longer-term health.”
Children
Protecting teeth starts early. Experts suggest that milky unsweetened tea can be offered from age four years onwards.[2] Tea naturally supplies fluoride, and research shows that fluoride from black tea, with or without milk, can remain in the mouth and bind to enamel.[3] Dr Ruxton says: “Tea is a far healthier drink for the teeth than cordials and sweetened drinks. As well as protecting tooth enamel, polyphenols in tea reduce numbers of oral bacteria responsible for bad breath.”[4]
Teenagers and students
Concentration matters during study. Tea helps improve mental focus and reduce stress especially during sleep deprivation, which is relevant for young people sitting exams. The effects are due to a unique combination of compounds found only in tea; caffeine and an animo acid called L-theanine[5]. In one clinical trial, participants given black tea improved attention, accuracy and alertness during computer-based tasks compared with those receiving a placebo drink.[6] Dr Ruxton says: “Give your teenager a cuppa before they sit down to study as it will be better for their mental health than a fizzy drink or water.”
People in their thirties
Looking after blood vessels is an investment in future heart health. Tea improves vascular function, helping to relax blood vessels and protect against high blood pressure. This is probably why regular tea drinking correlates with an 11% lower risk of heart attacks.[7] A meta-analysis of nine intervention studies found that tea improved the ability of arteries to relax in response to blood flow, boosting this by 40% relative to placebo.[8] Dr Bond says: “Tea is an easy habit to maintain alongside regular activity and a balanced diet with an ideal intake of 4 cups daily.”
People in their forties
Tea may also influence the gut microbiome which has been linked with protection against gut problems and even obesity. A 2026 genetic analysis using UK Biobank and other data linked tea consumption with changes in several groups of gut bacteria.[9] “This is an emerging area,” says Dr Ruxton. “It suggests another way tea might affect health, although clinical benefits need further study.” Tea polyphenols interact with gut microbes, making the relationship worth exploring.
People in their fifties
Metabolic health deserves attention as type 2 diabetes risk rises with age. The UK Biobank study followed nearly 400,000 adults for around 14 years. Compared with non-drinkers, those enjoying 2-3 cuppas daily had a 7% lower relative risk of type 2 diabetes while the benefit was doubled to 14% in those having 4-5 cups a day.[10] Dr Ruxton says: “Choosing unsweetened tea instead of a sugary drink is a practical way to cut sugar intake without losing the pleasure of a comforting drink.”
People in their sixties and beyond
Staying mentally sharp remains a priority. Research in adults aged 55+ linked tea drinking with better memory[11] while a meta-analysis of 18 studies involving nearly 60,000 participants found that regular green tea consumption was linked to 39% less cognitive impairment.[12] Dr Bond says: “These findings are encouraging. Enjoying tea is more than a social occasion for older people as it delivers clinical benefits thanks to the polyphenols and natural caffeine. A cup of tea provides 40-50mg caffeine per cup compared with 100mg in a coffee.”
