Healthy Eating & Lifestyle for Better Laboratory Health
Healthy laboratory results are influenced by more than genetics. Diet, physical activity, sleep, hydration, stress management and other lifestyle habits can all affect many blood test results over time.
This page provides educational guidance only and is not a personalised nutrition or medical plan.
Healthy Foods from Around the World
Healthy eating is possible in every culture. The examples below highlight nutritious foods commonly found in different regions of the world.
Choose foods that are appropriate for your culture, preferences and any advice given by your healthcare professional.
- Lean beef — Rich in iron and vitamin B12, supporting healthy red blood cell production.
- Oily fish (salmon, mackerel, sardines) — Provides omega-3 fatty acids that support heart health and may help maintain healthy triglyceride levels.
- Oats and wholegrains — High in soluble fibre, which may help maintain healthy cholesterol levels.
- Berries and leafy greens — Rich in antioxidants, vitamins and folate, supporting general cell health.
- Olive oil and nuts — Source of monounsaturated fats and vitamin E, supporting cardiovascular health.
- Millet, sorghum, fonio and amaranth — Whole grains rich in fibre, iron and B vitamins, supporting energy metabolism.
- Dark leafy greens (callaloo, amaranth, kale) — Excellent sources of folate, iron and calcium, supporting blood and bone health.
- Beans, peas, lentils and groundnuts — Plant proteins and fibre that may help support healthy blood sugar and cholesterol.
- Okra, plantain and sweet potato — Provide fibre, potassium and beta-carotene, supporting digestion and immune function.
- Fish — Supplies protein, omega-3 fatty acids and iodine, supporting thyroid and cardiovascular health.
- Brown rice, quinoa and oats — Complex carbohydrates and fibre that support steady blood sugar levels.
- Tofu, tempeh, edamame, lentils and chickpeas — Plant-based proteins, iron and calcium that support muscle and bone health.
- Seaweed — Rich in iodine and selenium, which support healthy thyroid function.
- Turmeric, ginger and garlic — Contain bioactive compounds that may support healthy inflammatory responses.
- Fish, eggs and low-fat dairy — Provide complete protein, vitamin D and B12, supporting overall nutritional status.
- Corn, sweet potato and beans — Fibre-rich staples that provide complex carbohydrates, vitamins and minerals.
- Turkey and lean beef — Lean proteins rich in iron, zinc and B vitamins, supporting blood cell formation.
- Salmon — Excellent source of omega-3 fatty acids and vitamin D for heart and bone health.
- Blueberries, cranberries and avocado — Antioxidant-rich fruits and healthy fats that support cardiovascular health.
- Walnuts, pecans and pumpkin seeds — Provide plant omega-3s, magnesium and zinc, supporting heart and immune function.
- Extra virgin olive oil — Rich in monounsaturated fats and polyphenols that support heart health.
- Tomatoes and colourful vegetables — High in antioxidants, potassium and fibre, supporting blood pressure and digestion.
- Legumes (chickpeas, lentils, beans) — Plant protein and soluble fibre that may help maintain healthy cholesterol.
- Oily fish and seafood — Supply protein, omega-3 fatty acids and iodine, supporting heart and thyroid health.
- Wholegrain breads and cereals — Provide sustained energy, B vitamins and minerals for metabolic health.
- Lentils, chickpeas and beans — Excellent sources of plant protein, iron and fibre to support blood health.
- Tofu and tempeh — Soy-based proteins that provide complete amino acids, iron and calcium.
- Nuts and seeds — Supply healthy fats, magnesium, zinc and vitamin E, supporting heart and immune health.
- Wholegrains and oats — Provide B vitamins, fibre and sustained energy for metabolic health.
- Leafy greens and colourful vegetables — Rich in folate, antioxidants and micronutrients that support cell health.
How Lifestyle May Influence Blood Tests
The choices you make every day can gradually affect many of the markers measured in routine laboratory testing. The connections below are educational observations, not predictions for any individual.
May support healthy haemoglobin and ferritin levels.
May help improve cholesterol and blood sugar markers.
Supports kidney function and may reduce concentration-related changes in some blood tests.
May improve cholesterol, glucose and inflammatory markers.
Supports hormonal balance and metabolic health.
May influence cortisol and some inflammatory markers.
Supports cardiovascular and metabolic health.
Daily Health Habits
Consistent habits often have a greater impact on long-term laboratory health than occasional dramatic changes.
Aim for at least 150 minutes of moderate physical activity each week together with muscle-strengthening activities on two or more days. Regular movement supports healthy cholesterol, glucose and blood pressure markers.
Aim for 7–9 hours of good-quality sleep each night. Poor sleep can raise cortisol, affect insulin sensitivity and influence inflammatory markers.
Drink sufficient fluids throughout the day unless your healthcare professional has advised otherwise. Dehydration can thicken blood and falsely raise some test values.
Regular relaxation, mindfulness, prayer or meditation may support overall wellbeing. Chronic stress may raise cortisol, blood pressure and platelet stickiness.
Stopping smoking benefits nearly every body system and improves long-term health. Smoking damages the lungs, liver, lipids, red cells and platelets.
Drink responsibly and follow national guidance. Excess alcohol can affect liver enzymes, lipids, blood pressure and blood cell counts.
Special Dietary Considerations
Nutritional needs vary with life stage, health conditions and personal choice. Personalised advice should always come from an appropriately qualified healthcare professional.
Requires attention to iron, vitamin B12, zinc and complete protein intake. Plant-based iron is less readily absorbed, so combining iron-rich foods with vitamin C can help.
Needs careful planning for vitamin B12, iron, calcium, iodine and omega-3 fatty acids. Fortified foods and appropriately chosen supplements may be necessary.
Increases requirements for folate, iron, iodine and calcium. Nutritional needs change across trimesters and should be guided by a qualified healthcare professional.
May have reduced absorption of vitamin B12 and vitamin D, together with changing protein requirements. Regular review of nutritional status is advisable.
Focus on low-glycaemic carbohydrates, controlled portions, fibre and healthy fats. Blood sugar monitoring and personalised dietary advice are essential.
Often requires modified protein, sodium, potassium and phosphorus intake. Dietary management must be individualised under professional guidance.
May require adjustments to protein, sodium and fluid intake depending on the condition. Alcohol should be avoided. Personalised advice is essential.
Food Supplements
Vitamins, minerals and herbal supplements may influence laboratory results. For example, high-dose biotin can interfere with certain hormone and cardiac marker assays, and excessive vitamin D can raise calcium levels.
You should always disclose any supplements you are taking to your healthcare professional before testing so that results can be interpreted accurately.
Diet and lifestyle can influence many laboratory markers. However, changes in blood test results can also result from medical conditions, medications, genetics and other factors.
This information is educational only and should not replace personalised medical or nutritional advice.
Steve Diongo
Founder & Scientific Lead · HCPC-Registered Specialist Biomedical Scientist · 15+ years NHS · 20+ years laboratory medicine
- Haematology
- Clinical Biochemistry
- Blood Transfusion
- Coagulation
- Laboratory Medicine