10 Best Health Foods for Long-Term Health, Energy & Longevity

You are quite literally what you eat.

The foods that you consume are the raw materials that build you from the inside out. They send constant signals to your body influencing everything from feelings of hunger, to your mood and metabolism.

Like many things in life, the quality of the inputs (the foods you eat) dictate the quality of the outputs (how your body feels and performs.)

Most chronic diseases don’t appear overnight. They are the result of thousands of small food choices, repeated day after day, year after year.

Poor choices such as ultra-processed foods, excess sugar, refined oils and low-nutrient diets quietly create the following problems:

• Chronic inflammation

• Insulin resistance

• Metabolic dysfunction

• Brain aging

• Cardiovascular disease

On the other hand, if you consistently choose nutrient-dense, whole foods; these can slow biological aging, protect your brain, improve energy levels and dramatically reduce disease risk.

The main insight from longevity science is that you don’t need extreme diets or constant perfection.

Instead, positive habits and small upgrades, done consistently over time, will compound into decades of better health.

This article breaks down the 10 best health foods — foods that are:

• Widely available

• Affordable

• Supported by strong scientific evidence

• Easy to include in daily life

Together, they form the foundation of what researchers often call the longevity diet.

The longevity diet isn’t a single rigid plan. It’s a pattern.

Across the Mediterranean, Blue Zones, and large population studies, the longest-living people tend to eat diets that are:

• Rich in plants

• High in fiber and antioxidants

• Moderate in protein

• Low in ultra-processed foods

• Centered around real, whole food ingredients

The foods below show up repeatedly in longevity research, because they support the body’s core systems:

• Metabolism

• Brain health

• Cardiovascular function

• Gut health

• Inflammation control

Try adding these foods to your daily routine more often to start enjoying their benefits and help to create your own longevtiy diet.

Berries such as blackberries, blueberries, acai berries, cherries, raspberries and strawberries consistently rank among the most powerful foods for brain and heart health.

Both delicious and highly nutritious, they are known to boost the immune system, protect against many cancers, and help liver and brain function. 

Bursting with antioxidants, berries average nearly ten times more than other fruits and vegetables (and over 50 times more antioxidants than in animal-based foods.)

Why Berries Are One of the Best Health Foods

• Berries are extremely high in polyphenols and antioxidants

• They have a low glycaemic load

• They have anti-inflammatory properties

Health and Longevity Benefits

• They slow down cognitive aging and memory decline

• Support cardiovascular health

• Reduce oxidative stress

A landmark study in Annals of Neurology found that regular berry consumption was associated with up to a 2.5 year delay in cognitive aging.

Easy Ways to Eat Them

• Add to yoghurt or oatmeal

• Frozen berries in smoothies

• Have a handful as a snack

Aim for 60g per serving of fresh or frozen berries, or 40g if dried. 

The beauty of berries is their versatility.  Frozen berries are generally as nutritious as fresh ones, so an easy way to incorporate them is to have a bag of frozen berries at home which can be defrosted in the microwave and added to cereals, smoothies or as a healthy dessert with natural yoghurt.

A key part of the Mediterranean diet - one of the worlds best diets to live a long, healthy life - Extra virgin olive oil (or EVOO for short) is one of the best foods for longevity ever studied.

Made up of healthy monounsaturated fats, these help to boost heart health and reduce inflammation alongside several other health benefits.

Why Extra Virgin Olive Oil is One of the Best Health Foods

• It's rich in monounsaturated fats

• Contains polyphenols like oleocanthal

• EVOO is anti-inflammatory and heart-protective

Health & Longevity Benefits

• EVOO consumption reduces cardiovascular disease risk, lowering bad cholesterol and blood pressure

• Lowers inflammation markers

• Supports brain health

The PREDIMED trial showed that people consuming a Mediterranean diet with olive oil had significantly lower rates of heart disease and mortality than average.

Easy Ways to add EVOO To Your Diet

• Drizzle on vegetables

• Use as your primary cooking fat, replacing seed oils

• Add to salads and soups

A simple addition to a longevity focused diet, extra virgin olive oil is one of the 10 best health foods due it's rich nutrient profile, helping to combat chronic disease and support healthy aging.

For the most benefits, choose a high quality EVOO that is cold pressed and in a dark bottle.

Compare the benefits of extra virgin olive oil vs avocado oil vs seed oils.

Leafy greens are nutritional powerhouses packed with vitamins such as A, C, K and folates, plus minerals including calcium, magnesium, iron and potassium.

They have a very low calorie density meaning they can aid with weightloss, are high in fiber and packed with antioxidants.

A diet rich in leafy green vegetables is a cornerstone of healthy eating, and come with a host of benefits.

Key Nutrients

• Folate

• Magnesium

• Vitamin K

• Carotenoids

Health Benefits of Leafy Green Vegetables

• They support brain health and memory

• Improve vascular function

• Reduce inflammation

• Reduce risk of chronic diseases like cancer and heart disease

Research from Neurology found that people who ate leafy greens daily had significantly slower cognitive decline than those who did not.

Healthy Quick Food Options

• Pre-washed salad mixes

• Sautéed greens with olive oil

• Blended into smoothies

When your parents told you to 'eat your greens' they were right.

Adding more leafy green vegetables to each meal is an easy way to add nutrient dense foods and build a longevity focused diet.

Fatty fish are the most reliable dietary source of omega-3 fatty acids (EPA & DHA) - essential fats that your body doesn't make itself, so requires either from the foods you eat or supplements.

These significantly benefit heart health and brain function by lowering triglycerides, and improving your circulation, eye health and mental wellbeing.

Higher omega 3 levels are also associated with a 30% lower risk of premature death, which is why health organizations recommend eating fatty fish at least twice a week.

Why Fatty Fish Are Essential To Your Diet

• They are high in EPA and DHA omega-3 fatty acids

• Supports cell membranes

• They contain anti-inflammatory properties

Health Benefits

• Lowers risk of cardiovascular disease

• Supports brain structure and function

• Improves mood and cognition

Higher omega-3 intake is associated with lower all-cause mortality in multiple large cohort studies.

Easy Ways to Eat Them

• Canned sardines or salmon

• Grilled or baked salmon

• Fish added to salads

Adding fatty fish to your diet is one of the most important longevity focused additioons to your diet that you can make.

Fatty fish types include salmon, mackerel, anchovies, sardines, trout and herring. Aim for Marine Stewardship Council (MSC) certified fish to ensure they are sourced sustainably.

Nuts are high energy and incredibly nutrient-dense powerhouses.

High in healthy fats , protein, fiber, vitamins and minerals - they improve cholesterol levels, support gut health, fight inflammation and boost brain function.

They are a healthy and versatile addition to your diet that supports cardiovascular and metablic health.

Whilst they all offer health benefits, for the most 'bang for your buck' choose walnuts, almonds, Brazil nuts, cashews and pistachios.

Why Walnuts Stand Out

• Walnuts are rich in omega-3 ALA

• Rich in antioxidants

• They support vascular health

Longevity Benefits of Nuts

• Reduced heart disease risk

• They can reduce bad cholesterol levels

• Lower inflammation

According to large observational studies, people who eat nuts regularly tend to live longer and healthier lives.

Quick Options

• Add a handful as a snack

• Add nuts to yoghurts or salads

• Use nut butters (with minimal ingredients)

Eat a variety of different types of nuts to enjoy their various benefits and aim for a small handful (around 30g) daily. Choose raw or dry roasted over salted varieties.

Legumes such as beans, lentils and peas are nutrient dense and high in fiber, plant protein, essential minerals and antioxidants.

They are a cornerstone of Blue Zone diets, supporting heart health by lowering bad cholesterol and blood pressure, stabilizing blood sugar (which helps to prevent diabetes) and promoting gut health.

Why They Matter

• High in fiber

• High in plant-based protein

• Low glycaemic impact with slow releasing carbohydrates offer a steady source of energy

Health Benefits

• Improved gut health

• Better blood sugar control

• Reduced cardiovascular risk

In longevity hotspots like Sardinia and Ikaria, legumes are eaten almost daily.

Easy Ways to Eat Them

• Eat canned lentils or beans

• Dip chopped vegetables such as carrots, cucumber or peppers in hummus for a healthy snack

• Added to soups and stews

Aim for at least one portion of legumes per day opting for no salt added canned options, or cook dried beans after soaking and rinsing.

Turmeric’s active compound, curcumin, is one of the most studied and strongest natural anti-inflammatory compounds, and has been used in medicine for thousands of years.

It is beneficial for boosting brain health, protecting the heart and helping healthy aging.

Benefits of Turmeric

• Reduces chronic inflammation

• Supports joint health

• Activates antioxidant pathways

Curcumin has been shown to reduce inflammatory markers comparable to NSAIDs in some studies — without the side effects.

How to Use It

• Turmeric and black pepper in cooking

• Golden milk

• Quality turmeric supplements

Combine with black pepper to increase absorption by up to 2000% and aim for around 1/2 to 1 teaspoon of turmeric powder per day.

Fermented foods such as yoghurt, kefir and sauerkraut contain probiotics which support the gut microbiome — a key regulator of longevity.

These foods improve your digestion and can help to lower the risk of certain diseases such as type 2 diabetes and heart disease.

Why Gut Health Matters

• Around 70% of the immune system lives in the gut

• Gut bacteria influences your metabolism and mood

Benefits of Fermented Foods

• Improved digestion

• Reduced inflammation

• Better immune regulation

Quick Options

• Live yoghurt or kefir

• Fermented vegetables as a side dish

• Small daily servings

Aim for fermented foods without unnecesary additives or high amounts of sugar and choose kefir, kimchi, sauerkraut and yoghurt for some of the most beneficial options.

Eggs are one of the most complete and affordable foods available. They contain complete protein, healthy fats and vitamins A, D, B12 and folates in addition to the minerals selenium and choline.

These help to support brain function, heart health and eye health amongst several other benefits.

Key Nutrients

• High-quality protein

• Choline (brain health)

• B vitamins

Health Benefits

• Supports muscle mass

• Helps maintain metabolic health

• Supports cognitive function

Despite outdated myths, moderate egg consumption is not associated with increased heart disease risk in healthy individuals.

Easy Ways to Eat Them

• Boiled eggs

• Omelettes with vegetables

• Quick scrambled eggs

Eggs are a convenient, affordable and versatile addition to your diet. Packed with vitamins and minerals, their high protein content (around 6-7g per egg) also helps to keep you fuller for longer.

I combine scrambled eggs with vegetables such as red onions and tomatoes, plus turmeric and black pepper most days for a nutritional breakfast that keeps me full until lunchtime.

Great news for the chocolate lovers amongst us. Yes — chocolate can be healthy, BUT only when chosen correctly.

Aim for types with a high cocoa content of at least 70%.

Packed with antioxidants, this type of chocolate is a superfood in itself and offers several powerful benefits. Rich in fiber and minerals including iron, magnesium, zinc and copper - it can help support heart health, boost brain function and improve mood.

Why It Helps

• Dark chocolate is rich in flavanols

• Improves blood flow

• Has antioxidant effects

Benefits of Dark Chocolate

• Supports heart health

• Improves mood

• May enhance cognitive function

The key is choosing a high cocoa content with minimal sugar. 70% dark chocolate is good - 85%+ is even better.

Eat 1–2 small squares after meals or paired with nuts or fruit.

Incorporating the 10 best health foods into a healthy eating plan that you can stick to doesn’t need to be complicated.

Simple examples of how you can add these foods into every day life include:

• Eating yoghurt with berries and nuts

• Eggs combined with leafy greens, such as scrambled eggs and spinach

• Tinned fish such as salmon or sardines mixed with olive oil and vegetables for an easy and healthy snack or dinner

• Lentil soup

• Have a couple of squares of dark chocolate as dessert after your evening meal

These foods are:

• Fast

• Affordable

• Widely available

• Highly protective over time

See how we combine healthy snacks such as these with other lifestyle tweaks to make a healthier version of you in the Biohacker's Longevity Starter Kit.

You should try to avoid and eliminate ultra-processed foods such as sugary snacks, packaged snacks (chips and cookies), frozen meals etc wherever possible as these foods:

• Spike your blood sugar

• Increase inflammation in the body

• Impair gut health

• Accelerate aging

By instead choosing whole foods - such as those in our 10 best health foods list - these will help to:

• Stabilize your metabolism

• Reduce disease risk

• Support brain and heart health

These foods nourish your body and give them the nutrients that it requires to perform properly, protect against disease and age healthier - improving your long term health and lifespan.

Remember: Longevity isn’t about restriction — it’s about consistency and repetition of good choices over the long term.

The 10 best health foods share a common theme - they work with your biology, not against it.

You don’t need to eat perfectly every single day. You just need to eat slightly better, more often.

When you build meals around:

• Plants

• Healthy fats

• High fiber foods

• Quality protein

You are following the longevity diet — whether you call it that or not.

Over time, these choices compound into giving you:

• More energy

• Sharper thinking

• Lower disease risk

• A longer, healthier life

Start small. Stay consistent and let time do the work.

For other simple lifestyle tweaks you can make to perform and age better, download the free guide '7 Longevity Hacks You Can Start Today.'