The most important foundations of staying healthy

Staying healthy does not depend on a single diet, a vitamin product or an occasional check-up. Long-term physical and mental wellbeing is shaped mainly by our repeating habits, our living conditions, inherited factors and healthcare used at the right time.

Prevention is not only about avoiding disease. Reducing risk factors, spotting changes early, and treating existing conditions so that complications are limited matter just as much.

What does prevention mean?

Healthcare prevention has three main levels.

Primary prevention aims to stop disease from developing in the first place. This includes, for example:

• a balanced diet
• regular physical activity
• not smoking
• limiting alcohol
• adequate sleep
• vaccinations
• preventing accidents at work and at home
• supporting mental health

Secondary prevention means detecting disease early, preferably while it is still symptom-free. Targeted screening and periodic health assessments are the main tools.

Tertiary prevention applies once a diagnosis is already made: it aims to slow further decline, prevent complications and lasting harm. Regular specialist follow-up, medication, physiotherapy and rehabilitation may belong here.

A balanced diet

A healthy diet supplies the energy, protein, fat, carbohydrate, vitamins, minerals and fibre the body needs. What matters is the overall pattern over time, not a single food added or left out.

It is worth eating regularly:

• vegetables and fruit of different colours
• wholegrain cereals
• legumes
• lean meat, fish, eggs or other suitable protein sources
• milk and dairy foods, or appropriate alternatives
• nuts, seeds and good-quality plant oils

It is advisable to limit:

• foods and drinks with added sugar
• excessive salt
• large amounts of saturated and trans fat
• highly processed foods
• regular snacking
• oversized portions

Extreme or unnecessarily restrictive diets can lead to deficiencies. Food allergy, diabetes, kidney disease, digestive complaints or significant weight problems call for personalised medical and dietetic advice.

Adequate fluid intake

Water is essential for circulation, temperature control, digestion and many metabolic processes. Fluid need varies with age, body size, activity, weather, pregnancy and health. Drinking water should be the main source.

Regular sugary soft drinks add a lot of extra energy, so they are worth cutting back. In some heart and kidney conditions general fluid advice does not apply automatically: follow the treating doctor's instructions.

Regular physical activity

Movement supports the heart and blood vessels, muscles, bones and joints. It can help with weight, sleep and mood, and may lower the risk of several chronic diseases.

For adults, each week at least:

• 150–300 minutes of moderate aerobic activity, or
• 75–150 minutes of vigorous activity, or an equivalent mix
• strengthening exercises for the major muscle groups at least twice a week

You do not need to start with an intense programme. Brisk walking, cycling, swimming, gardening, taking the stairs and short movement breaks during the day all count. After chronic illness, significant overweight, previous injury, pregnancy or a long period of inactivity, speak to a doctor or physiotherapist before a new training plan.

Approaching a healthy weight

Overweight, especially abdominal fat, can raise the risk of high blood pressure, type 2 diabetes, sleep apnoea, some musculoskeletal problems and certain cancers. A healthy weight is not only an appearance issue, and it is not defined by the number on the scale alone.

It is also important to consider:

• height and body composition
• waist circumference
• age and muscle mass
• metabolic values
• existing conditions
• medicines in use

Lasting weight loss usually comes from gradual changes in eating and activity, not from rapid crash diets. Losing weight too fast or too far can also harm health.

Enough restorative sleep

During sleep the body and nervous system recover. Lasting sleep loss can impair attention, mood and performance, and can affect metabolism and cardiovascular health. Most adults aged 18–65 need about 7–9 hours a night.

Sleep may improve if you:

• go to bed and get up at roughly the same times
• keep the bedroom quiet, dark and comfortably cool
• avoid caffeine and alcohol in the evening
• limit heavy late meals
• move regularly during the day
• cut screen use in the late evening

Persistent insomnia, loud snoring, pauses in breathing during sleep, morning headache or daytime sleepiness warrant a medical assessment.

Mental health and stress

Mental health is part of overall health. Lasting stress, anxiety, loneliness and overload can affect sleep, eating, work and relationships as well as how you feel.

Balance may be supported by:

• regular rest and time outdoors
• physical activity and activities you enjoy
• supportive relationships
• clearer boundaries between work and private life
• relaxation or breathing exercises
• seeing a psychologist or another professional when needed

Asking for help is not a sign of weakness. Lasting low mood, loss of interest, strong anxiety, panic attacks, addiction or a marked drop in daily functioning should prompt professional help. Thoughts of self-harm or suicide require immediate help.

Smoking, nicotine and alcohol

Smoking raises the risk of many cancers, cardiovascular and respiratory diseases. Passive smoking is not harmless either. E-cigarettes and other nicotine products also carry health risks and can lead to dependence. Quitting is beneficial at any age.

Alcohol can affect the liver, heart, nervous system and digestive tract, raise the risk of certain cancers and accidents, and lead to dependence. There is no risk-free amount for everyone. Alcohol should be avoided entirely in pregnancy, childhood and adolescence, with certain illnesses or medicines, and when driving or doing hazardous work.

Screening and regular check-ups

Screening aims to find disease or precursor states before they cause symptoms. If you already have a complaint, you need a targeted medical work-up, not screening. Which tests are useful, and how often, depends on age, sex, family history, lifestyle, occupation, previous illness and medicines.

Depending on individual risk, the following may be considered:

• blood pressure measurement
• blood glucose and blood lipid tests
• checking weight and waist circumference
• dental examination
• vision and hearing tests
• cervical screening
• breast screening
• bowel cancer screening
• dermatology check
• osteoporosis risk assessment

Not every laboratory or imaging test is suitable as general screening. Unnecessary tests can produce false positives, worry and further procedures that are not needed. A screening plan is best agreed with a GP or specialist.

Vaccines, mouth, skin and medicines

Vaccines are not only for childhood. Some need booster doses; others are recommended by age, job, chronic illness, pregnancy, travel or individual risk.

Teeth and gums are part of general health. Skin protection means avoiding strong sun, suitable clothing, broad-spectrum sunscreen, skipping sunbeds, and watching moles. A new, fast-growing, bleeding, non-healing or changing skin lesion needs a dermatology review.

Over-the-counter products, herbal remedies and supplements can also cause side effects, overdose or drug interactions. “Natural” does not automatically mean safe for everyone.

When is a lifestyle change not enough?

A healthy lifestyle can lower the risk of many diseases, but it is not complete protection. A medical examination is warranted, among other situations, if:

• a symptom lasts or keeps returning
• unintentional weight loss occurs
• unexplained fatigue or weakness develops
• a new lump or swelling can be felt
• a cough or hoarseness persists
• bowel or urinary habits change
• unusual bleeding occurs
• a wound or skin change does not heal
• fever keeps returning or night sweats appear
• previously usual activity becomes harder

Severe chest pain, shortness of breath, one-sided weakness, speech disturbance, loss of consciousness, a severe allergic reaction or a sudden major deterioration require immediate emergency help.

How to start

Too many rules at once are often unsustainable. Choose one or two concrete, realistic goals. To begin, for example:

• take a 20–30 minute walk each day
• include vegetables with every main meal
• choose water more often instead of sugary drinks
• set a regular bedtime
• stand up for a few minutes each hour if you sit at work
• agree overdue screening with your GP

Small changes kept up over time can achieve more than a brief, overly strict programme. The information here is for guidance only. It does not replace a medical examination, diagnosis or personalised health advice.