Healthy Fats Explained:
12 Nutritious High-Fat Foods That Can Support Your Heart, Brain and Overall Health
By Lilla Fonyo — Healthy Lifestyle & Longevity Writer
Last Update August 2026
Quick Summary
For many years, dietary fat was unfairly blamed for weight gain and poor health. Today, experts agree that not all fats are created equal. In fact, healthy fats play an important role in supporting heart health, brain function, hormone production and the absorption of key vitamins.
The key is choosing foods rich in unsaturated fats, such as oily fish, avocados, nuts, seeds and olive oil, while limiting foods high in saturated and trans fats. When enjoyed as part of a balanced diet, healthy high-fat foods can help keep you full, provide essential nutrients and support long-term wellbeing.
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Why Healthy Fats Matter
Fat is an essential nutrient that your body needs to function properly. According to the NHS, fats help the body absorb vitamins A, D and E, provide energy and supply essential fatty acids that the body cannot produce on its own.
While all fats contain calories, the type of fat you eat matters more than simply avoiding fat altogether. Research has shown that replacing some saturated fats with unsaturated fats can help improve cholesterol levels and support heart health.
Healthy fats can also:
- Support brain and nervous system function
- Promote healthy hormone production
- Help absorb fat-soluble vitamins
- Keep you feeling fuller for longer
- Contribute to heart health
- Help reduce inflammation in the body
12 Healthy High-Fat Foods Worth Adding to Your Diet
1. Avocados
Avocados are one of nature's richest sources of healthy monounsaturated fats. Unlike most fruits, which are higher in carbohydrates, avocados contain predominantly healthy fats.
Benefits
- Rich in heart-friendly monounsaturated fats
- Excellent source of potassium
- High in fibre
- Contains antioxidants that support eye health
- May help improve cholesterol levels
Easy Ways to Enjoy
- Smashed on wholegrain toast
- Added to salads and wraps
- Blended into smoothies
- Served alongside eggs
2. Oily Fish
Oily fish are among the healthiest foods you can eat. They provide omega-3 fatty acids, which support heart and brain health.
Best Choices
- Salmon
- Mackerel
- Sardines
- Herring
- Trout
- Anchovies
Benefits
- Rich in omega-3 fatty acids
- High-quality protein source
- Contains vitamin D
- Supports cardiovascular health
- May improve cognitive function
Tip
Aim for at least two portions of fish per week, including one portion of oily fish.
3. Extra Virgin Olive Oil
A key part of the Mediterranean diet, extra virgin olive oil is widely recognised as one of the healthiest sources of fat.
Benefits
- Rich in monounsaturated fats
- Contains powerful antioxidants
- May help lower LDL ("bad") cholesterol
- Supports heart health
- Has anti-inflammatory properties
Tip
Use it in salad dressings, drizzle over vegetables or use it for light cooking.
4. Nuts
Nuts are packed with healthy fats, protein, fibre, vitamins and minerals.
Healthy Choices
- Almonds
- Walnuts
- Hazelnuts
- Brazil nuts
- Macadamias
- Peanuts
Benefits
- Rich in healthy unsaturated fats
- Good source of plant protein
- High in vitamin E
- Contains magnesium
- Associated with improved heart health
Portion Guide
A small handful (around 30g) is usually enough.
5. Chia Seeds
These tiny seeds deliver an impressive nutritional punch.
Benefits
- Rich in omega-3 fatty acids
- Packed with fibre
- Contains antioxidants
- May support healthy blood pressure
- Contributes to digestive health
Tip
Sprinkle over porridge, yoghurt or salads.
6. Flaxseeds
Flaxseeds are another excellent plant-based source of omega-3 fats.
Benefits
- High in fibre
- Rich in omega-3 fatty acids
- Contains beneficial plant compounds called lignans
- May support cholesterol management
Tip
Add ground flaxseed to cereals, smoothies and baking.
7. Eggs
Eggs have undergone a major nutritional comeback in recent years.
Benefits
- Nutrient dense
- Rich in protein
- Good source of choline, important for brain health
- Supports satiety and weight management
Tip
Boiled, poached and scrambled eggs make nutritious breakfast choices.
8. Full-Fat Natural Yoghurt
Natural full-fat yoghurt combines healthy fats with beneficial probiotics.
Benefits
- Supports gut health
- High in protein
- Good source of calcium
- Contains beneficial bacteria
- May help you feel fuller for longer
Tip
Choose natural or Greek-style yoghurt with no added sugars.
9. Cheese
When enjoyed in moderation, cheese can be a nutritious addition to a balanced diet.
Benefits
- Rich in calcium
- Good source of protein
- Contains vitamin B12
- Provides phosphorus and selenium
Tip
Pair with fruit or wholegrain crackers for a balanced snack.
10. Dark Chocolate
Good news for chocolate lovers: quality dark chocolate offers more than just great taste.
Benefits
- Rich in antioxidants
- Contains magnesium and iron
- Provides fibre
- May support heart health
Tip
Choose varieties containing at least 70% cocoa.
11. Olives
A staple of Mediterranean eating patterns, olives are naturally rich in monounsaturated fats.
Benefits
- Supports heart health
- Contains beneficial plant compounds
- Rich in antioxidants
- Convenient healthy snack
Tip
Add to salads, pasta dishes or enjoy as part of a Mediterranean-style platter.
12. Nut and Seed Butters
Natural nut and seed butters provide many of the same benefits as whole nuts.
Benefits
- Rich in healthy fats
- Provides protein and fibre
- Convenient and versatile
- Helps increase fullness
Tip
Choose products without added sugar, palm oil or excessive salt.
Understanding Healthy vs Unhealthy Fats
Healthy Fats
Healthy fats mainly include:
Monounsaturated Fats
Found in:
- Olive oil
- Avocados
- Almonds
- Hazelnuts
- Peanuts
Polyunsaturated Fats
Found in:
- Oily fish
- Chia seeds
- Flaxseeds
- Walnuts
- Rapeseed oil
These fats can help maintain healthy cholesterol levels and support heart health.
Fats to Limit
Saturated Fats
Foods higher in saturated fat include:
- Processed meats
- Pastries and cakes
- Butter
- Cream
- Some confectionery
According to NHS guidance, men should consume no more than 30g of saturated fat daily, while women should limit intake to 20g per day.
Trans Fats
Trans fats are linked with increased cholesterol levels and should be kept as low as possible.
What the NHS Says About Healthy Fats
The NHS recognises that fat is an essential part of a healthy, balanced diet. Rather than avoiding fat completely, the recommendation is to reduce saturated fat intake and replace some of it with healthier unsaturated fats.
Key NHS recommendations include:
- Eat at least two portions of fish per week, including one oily fish portion.
- Choose vegetable oils such as olive, sunflower or rapeseed oil.
- Include nuts, seeds and avocados as part of a balanced diet.
- Limit foods high in saturated fat and trans fats.
- Read food labels to monitor fat and saturated fat intake.
What PubMed Research Says About Healthy Fats
Scientific research published in PubMed highlights important differences between types of dietary fats.
Studies suggest that diets rich in monounsaturated fats, such as those found in olive oil, avocados and nuts, may improve insulin sensitivity and support weight management. Research also shows that omega-3 fatty acids from oily fish may help reduce inflammation and lower cardiovascular risk.
Evidence continues to support Mediterranean-style eating patterns rich in:
- Extra virgin olive oil
- Nuts
- Seeds
- Avocados
- Oily fish
These foods have consistently been associated with better heart health outcomes and lower rates of cardiovascular disease.
Takeaway
Healthy fats deserve a place on your plate. While excessive amounts of any food can contribute to weight gain, nutrient-rich high-fat foods such as avocados, oily fish, nuts, seeds, olive oil and natural yoghurt provide important health benefits.
Rather than fearing fat, focus on choosing the right types. Swapping saturated fats for healthier unsaturated fats can support heart health, improve cholesterol levels and help create a balanced, satisfying diet.
❓ FAQ — Healthy Fats
Are high-fat foods bad for weight loss?
Not necessarily. Healthy fats can increase feelings of fullness and satisfaction, which may help reduce overeating. Portion sizes still matter because fats are calorie-dense.
Which fats are considered healthiest?
Monounsaturated and polyunsaturated fats are considered the healthiest forms of fat. These are found in foods such as olive oil, avocados, nuts, seeds and oily fish.
Can I eat eggs every day?
For most healthy people, eggs can be part of a balanced daily diet. They provide high-quality protein and essential nutrients.
Is full-fat yoghurt healthier than low-fat yoghurt?
Both can fit into a healthy diet. However, full-fat natural yoghurt is often less processed and may be more satisfying than some low-fat varieties with added sugars.
How much oily fish should I eat?
UK guidelines recommend at least two portions of fish each week, with one portion being oily fish such as salmon, mackerel or sardines.
Is olive oil better than butter?
Olive oil contains more heart-healthy unsaturated fats, making it a healthier everyday choice for most people.
Are nuts fattening?
Nuts are calorie-dense but highly nutritious. Research suggests people who regularly eat nuts are not more likely to gain weight when consumed in sensible portions.
What are the best plant-based sources of healthy fats?
Avocados, olives, olive oil, nuts, chia seeds, flaxseeds and nut butters are among the best plant-based sources.
This content is for educational purposes and does not replace medical advice…
About the author
Lilla Fonyo is a healthy lifestyle and longevity writer with a background in endurance running, nutrition, and mindful living. She focuses on sustainable habits that support long-term physical and mental wellbeing.
Sources:
www.healthline.com - 9 High-Fat Foods That Offer Great Health Benefits
www.nhs.uk - Fat: the facts
www.bhf.org.uk - 6 surprisingly healthy fatty foods
www.medicalnewstoday.com - What are the healthiest high fat foods?
www.pmc.ncbi.nlm.nih.gov - Good Fats versus Bad Fats: A Comparison of Fatty Acids in the Promotion of Insulin Resistance, Inflammation, and Obesity