Why Healthy Fats Are Essential for Women Over 40
If you grew up during the low-fat era of the 80s and 90s, there's a good chance you've spent a large part of your adult life believing that eating fat makes you fat.
Low-fat yoghurts, low-fat spreads, fat-free dressings and diet foods were everywhere.
But we now understand that fat isn't something we should automatically fear. In fact, eating the right types of fat is an important part of a healthy diet — and becomes particularly relevant as we move through our 40s, perimenopause, menopause and beyond.
Healthy fats support your brain, heart and cells, help you absorb essential vitamins and provide fatty acids your body cannot make for itself.
So rather than trying to eliminate fat, the goal should be to choose better sources of it.
What Do We Mean By Healthy Fats?
When we talk about healthy fats, we're generally talking about foods rich in unsaturated fats, including monounsaturated and polyunsaturated fats.
You'll find them in foods such as:
Extra virgin olive oil
Avocados
Nuts
Seeds
Oily fish
Olives
Omega-3 fatty acids are a type of polyunsaturated fat and are particularly interesting for women over 40. Oily fish such as salmon, sardines, mackerel and trout are excellent sources of the long-chain omega-3 fats EPA and DHA.
This doesn't mean every other type of fat needs to be completely avoided. It's your overall dietary pattern that matters.
But replacing some foods high in saturated fat with foods containing unsaturated fats is generally a better choice for cardiovascular health.
1. Healthy Fats Support Your Heart
Heart health deserves much more attention during midlife.
Before menopause, oestrogen has several effects on the cardiovascular system. As oestrogen declines, women's cardiovascular risk gradually increases.
This makes the everyday choices we make around food, exercise, smoking, alcohol, sleep and maintaining a healthy blood pressure increasingly important.
Unsaturated fats can form part of a heart-healthy diet.
For example, replacing some saturated fats with unsaturated fats can help maintain healthier cholesterol levels.
Simple swaps could include:
Butter → olive oil
Processed meat → salmon
Biscuits → handful of nuts
Creamy dressing → olive-oil-based dressing
You don't have to completely overhaul your diet. Small changes made consistently can add up over time.
2. Your Brain Needs Fat Too
Your brain contains a large amount of fat, and fatty acids are important components of brain-cell membranes.
One omega-3 fatty acid in particular — DHA — is highly concentrated in the brain and plays an important structural role.
This becomes especially relevant when we're thinking about long-term cognitive health.
Many women also report changes in memory, concentration and "brain fog" during perimenopause. Healthy fats aren't a magic cure for these symptoms, but ensuring you're getting adequate essential fatty acids is one part of providing your brain with the nutrients it needs.
Think of nutrition as one piece of a much bigger brain-health puzzle alongside exercise, sleep, social connection, learning and managing cardiovascular risk.
3. Fat Helps You Absorb Important Vitamins
You can eat an incredibly nutritious salad, but adding a little healthy fat can actually help your body make use of some of those nutrients.
That's because vitamins A, D, E and K are fat-soluble vitamins.
Your body needs dietary fat to absorb them effectively.
This is another reason extremely low-fat diets aren't necessarily a good idea.
Try adding:
🥑 Avocado to your salad
🫒 Olive oil to roasted vegetables
🥜 Nuts to Greek yoghurt
🌱 Seeds to porridge
🥚 Eggs alongside vegetables
It's not simply about what nutrients you eat — it's also about giving your body what it needs to absorb and use them.
4. Omega-3s May Help Support Inflammation
Inflammation often gets talked about as though it's always bad, but inflammation is actually a normal and necessary part of your immune system.
The problem is persistent, low-grade inflammation.
Diet is only one factor involved, but omega-3 fatty acids have well-established roles in the body's inflammatory processes.
Oily fish is one of the easiest ways to increase your intake.
A good goal is to regularly include foods such as salmon, sardines, trout or mackerel in your diet.
And don't forget plant sources such as walnuts, chia seeds and flaxseeds, which provide a different omega-3 called ALA.
5. Healthy Fats Can Make Meals More Satisfying
One of the biggest mistakes I see women making after 40 is constantly trying to eat less.
Smaller breakfast.
Tiny lunch.
Low-fat everything.
Then by late afternoon they're absolutely starving and wondering why they're craving everything in sight.
Fat slows gastric emptying and contributes to the satisfaction and enjoyment we get from meals.
Combine it with protein, fibre-rich carbohydrates and vegetables, and you've got the foundations of a much more satisfying meal.
For example:
Greek yoghurt + berries + walnuts
Eggs + avocado + wholegrain toast
Salmon + potatoes + vegetables + olive oil
Chicken + wholegrain rice + vegetables + avocado
The goal isn't to add huge amounts of fat to everything you eat. It's about building balanced meals that actually nourish and satisfy you.
6. But Healthy Fats Are Still Calorie-Dense
This is an important point that's sometimes missed on social media.
Just because something is healthy doesn't mean we need unlimited amounts of it.
Fat contains around 9 calories per gram, compared with approximately 4 calories per gram for protein and carbohydrate.
So foods such as nuts, nut butter, avocado and olive oil are nutrient-dense — but also energy-dense.
You don't need to fear them, but portions still matter, particularly if fat loss is one of your goals.
A tablespoon of olive oil rather than several large glugs still provides the benefits.
A small handful of nuts is very different from absent-mindedly eating the entire bag!
Healthy doesn't mean unlimited.
7. Don't Forget Protein
While we're talking about healthy fats, there's another nutrient women over 40 shouldn't overlook: protein.
From our 40s onwards, preserving muscle becomes increasingly important.
Muscle supports strength, mobility, metabolic health and our ability to remain physically independent as we get older.
That's why I don't want women simply adding avocado and olive oil to meals and thinking they've ticked the longevity box.
Build your meals around:
PROTEIN + PLANTS + FIBRE + HEALTHY FATS.
For example:
Salmon + lentils + vegetables + olive oil
Greek yoghurt + berries + seeds + walnuts
Eggs + wholegrain toast + avocado + tomatoes
Chicken + quinoa + vegetables + olive oil
Simple, nutritious and satisfying.
The Best Healthy Fats for Women Over 40
If you want to improve the quality of the fats in your diet, start with these:
Extra virgin olive oil — rich in monounsaturated fats and polyphenols.
Oily fish — salmon, sardines, mackerel and trout provide EPA and DHA omega-3 fatty acids.
Avocado — provides predominantly monounsaturated fat alongside fibre and other nutrients.
Walnuts — contain unsaturated fats and plant-based omega-3 ALA.
Chia and flaxseeds — provide fibre as well as ALA omega-3 fats.
Almonds and other nuts — a convenient combination of unsaturated fats, fibre, protein, vitamins and minerals.
Eggs — nutrient-dense and a useful source of protein alongside dietary fat.
What About Menopause and Hormones?
You'll often see claims online that eating particular fats will "balance your hormones."
We need to be careful with that language.
Menopause happens because ovarian hormone production changes and eventually declines. Eating avocado or taking an omega-3 supplement isn't going to reverse that process.
What good nutrition can do is support the systems affected as we age and move through menopause.
That's an important difference.
A nutritious diet containing adequate protein, fibre, vegetables, fruit and healthy fats can help support cardiovascular health, metabolic health, bone health and overall wellbeing.
Combine that with strength training, cardiovascular exercise, good sleep and regular movement, and you've got a far more powerful approach to healthy ageing than searching for one miracle menopause food.
The Bigger Longevity Picture
Longevity isn't about finding one superfood.
And it's definitely not about trying to stay as thin as possible.
For women over 40, I believe the conversation needs to move towards healthspan — not simply how long we live, but how well we live those years.
Can you climb the stairs easily?
Carry your shopping?
Get up from the floor?
Travel?
Play with your grandchildren?
Keep doing the activities you love?
Maintain your independence?
That's why nutrition matters.
And it's why strength training matters.
And sleep.
And walking.
And friendships.
And looking after your heart.
Healthy fats are simply one piece of that much bigger longevity puzzle.
Stop Fearing Fat After 40
If you've spent decades automatically reaching for anything labelled "low fat", it might be time to rethink what a healthy diet looks like.
You don't need enormous amounts of fat.
You don't need to put butter in your coffee.
And you certainly don't need to follow an extreme high-fat diet.
Simply start including sensible portions of nutrient-rich foods such as olive oil, oily fish, nuts, seeds and avocado alongside plenty of protein, vegetables, fruit and fibre-rich carbohydrates.
After 40, nutrition shouldn't just be about eating less so you can weigh less.
It should be about giving your body what it needs to remain strong, mobile, healthy and independent for decades to come.
Because that's what longevity really means.