Let me ask you something honestly — when was the last time you sat down and really thought about what you were eating, not just in terms of calories or whether it was ‘clean’, also in terms of what it was actually doing for your heart, your arteries, your energy, your future?
Because here’s the thing that I find endlessly fascinating as a healthy-heart coach – most of us are walking around with a tremendous amount of untapped potential when it comes to how we nourish ourselves, and the science of personalised nutrition is making it clearer than ever that there is no single diet that works perfectly for every single body on this planet — and that the journey to a healthier heart is one of the most deeply individual, nuanced, and frankly exciting things you can ever embark on.
Heart disease remains the leading cause of death globally, and yet the research continues to show us, with growing certainty, that so much of it is preventable through the choices we make every single day — not just the big dramatic ones – instead via the quiet, cumulative ones – namely what goes on your plate at breakfast, whether you reach for the olive oil or the margarine, whether your plate is a riot of colour or a beige landscape of processed convenience. And when we start talking about personalised nutrition — meaning, the way that your unique genetics, your gut microbiome, your hormones, your lifestyle and your history all come together to determine how food affects you specifically — everything gets even more interesting.
So let’s dive into what the evidence is telling us, what works, and what you might want to start exploring for your own heart — because your heart deserves a strategy that is built for you, not just borrowed from the nearest bestseller list.
Why one-size-fits-all nutrition has never really worked for the heart
For decades, the advice handed down to us about heart health was essentially the same for everyone – lower your fat intake, watch your salt, eat more fibre, reduce red meat. And whilst these broad principles have value, we’ve learned enormous amounts via decades of research including via nutrigenomics. – namely your genes interact with the food you eat.
We now know that the way your body responds to specific foods is profoundly shaped by your biology. Two people can follow an identical diet and end up with completely different outcomes in terms of cholesterol levels, blood pressure, inflammatory markers, and cardiovascular risk.
Saturated fat is a handy illustration of this because for decades we were told, collectively, that saturated fat raises cholesterol and therefore harms the heart, full stop, no further discussion required. However what the research has since revealed is significantly more layered. For example people who carry the APOE4 gene variant — roughly one in four of us — show a much sharper rise in LDL cholesterol in response to saturated fat than those with other APOE variants, meaning that a diet rich in butter or coconut oil can have a genuinely different cardiovascular impact depending on which version of that gene you carry.
For someone without that variant, moderate saturated fat in an otherwise whole-food diet may register as relatively neutral; for someone with APOE4, the same dietary pattern could be meaningfully elevating their risk.
This is not a reason for alarm — it’s a reason for knowledge, and a reminder that borrowing someone else’s food philosophy without understanding your own biology is a bit like wearing someone else’s prescription glasses and wondering why everything looks blurry.
The extraordinary power of anti-inflammatory eating
Inflammation is one of the most important concepts in heart health that doesn’t get nearly enough airtime in everyday conversations. It’s a powerful concept because understanding this genuinely changes the way you look at your plate.
Chronic low-grade inflammation — the kind that simmers away silently in your body without any obvious symptoms — is now understood to be a central driver of atherosclerosis, which is the process by which plaques build up in your artery walls and narrow the passages that your heart depends on to keep blood flowing freely. The food you eat has a profound ability to either fan the flames of that inflammation or to actively calm it down.
The most consistently anti-inflammatory dietary pattern in the research literature is the Mediterranean style of eating, and when you look at what it actually involves — abundant vegetables, legumes, olive oil, nuts, seeds, fish, herbs and spices, whole grains and very little processed food — it’s hard not to fall a little bit in love with it, because it’s genuinely delicious and doesn’t feel like deprivation.
A landmark meta-analysis published in Nutrients in November 2024, covering 679,259 participants across multiple continents, found that high adherence to the Mediterranean diet reduced the risk of all-cause mortality by 23% and significantly lowered cardiovascular event rates in older adults — which is about as compelling as research evidence gets. 1
However here’s where personalisation comes in, because not everyone thrives on the same version of it. Someone dealing with an autoimmune condition might need to pay closer attention to nightshades; someone with a tendency toward elevated triglycerides might need to be more thoughtful about certain carbohydrates even within the ‘whole grain’ category; someone with known APOE4 gene variants — which are associated with altered fat metabolism and cardiovascular risk — might respond differently to saturated fat than the average person. The Mediterranean approach gives us a valuable, research-backed foundation, however the art is in adjusting it to your own body’s particular needs and signals.
Your gut microbiome and your heart are in a constant conversation
Here is something that still blows my mind every time I think about it – the trillions of microorganisms living in your gut are not just involved in digestion — they are actively influencing your cardiovascular health in ways that we, including scientists, are only beginning to fully understand.
The gut-heart axis, as researchers call it, is a real and increasingly well-documented connection, and one of the most striking examples of this involves a compound called TMAO — trimethylamine N-oxide — which is produced when certain gut bacteria metabolise specific nutrients found in red meat and eggs. In some people, high TMAO levels are associated with an elevated risk of heart attack and stroke, while in others, the same foods barely register a rise in TMAO at all — and the difference comes down almost entirely to the composition of their individual microbiome.
What this means practically is that nurturing the diversity and health of your gut bacteria is genuinely cardiovascular self-care, and the most powerful way to do that through food is by eating a wide and varied range of plant foods — not just one or two types of vegetables, instead eating as many different kinds as you can get your hands on across the week. Fermented foods play a vital role here too – live yoghurt, kefir, sauerkraut, kimchi, miso, tempeh — these foods introduce beneficial bacteria directly into your gut ecosystem and have been shown to reduce inflammatory markers that are directly relevant to heart health.
The goal is diversity, abundance, and consistency — which, again, looks slightly different for everyone depending on what your gut is currently working with.
Rethinking fats – the nuance your heart actually needs
The fat conversation in nutrition has had a rather dramatic evolution over the past few decades, and it’s important to clarify that the old ‘all fat is bad for your heart’ narrative has done a lot of damage and continues to cause confusion.
The truth is interstingly nuanced – the type of fat matters enormously, and so does the overall context of your diet and your individual metabolic profile. Replacing saturated fats with refined carbohydrates — which happened on a huge scale in the low-fat diet era of the 1980s and 1990s — turned out to do nothing good for cardiovascular health, and in many cases made things worse.
Extra virgin olive oil deserves its own paragraph, truly, because the evidence behind it is remarkable — it is rich in oleocanthal, a compound with anti-inflammatory properties comparable in mechanism to aspirin, as well as oleic acid and a raft of polyphenols that protect LDL cholesterol from oxidation, which is one of the key steps in the development of arterial plaques.
Avocados, walnuts, almonds, Brazil nuts — all of these bring heart-supportive monounsaturated and polyunsaturated fats to the table, along with fibre, magnesium, and a variety of phytonutrients that work synergistically to protect the cardiovascular system.
Meanwhile, trans fats — found in certain processed and fried foods — remain the one fat that the research is unequivocally clear about – they are harmful to heart health and worth avoiding as consistently as possible.
The underrated heroes – fibre, polyphenols, and phytonutrients
One thing that would create maximum impact in the way most people eat in the Western world, is to dramatically increase their intake of fibre and plant polyphenols — because these two things, perhaps more than anything else except reducing ultra-processed food, have the potential to transform cardiovascular outcomes at a population level.
Soluble fibre, the kind found in lentils, chickpeas, black beans, apples, pears, oats and psyllium husk, acts like a sponge in your digestive system, binding to cholesterol-containing bile acids and carrying them out of the body before they can be reabsorbed, which results in a measurable lowering of LDL cholesterol over time. This is not a ‘trick’ — this is food doing what it evolved to do.
In fact an effective way I’ve found to ensure my body receives the ideal amount of fibre, regardless of life events that can make consistent access to these foods possible (eg especially when travelling) is to use a proven + tested daily supplement that delivers, every time. If you’d like to know what to look for in a cost-effective option, simply reply to this email.
Polyphenols are the astonishing family of plant compounds that give berries their deep colours, dark chocolate its slight bitterness, green tea + kawa kawa tea their grassy notes, and red wine its tannic dryness — and they have been shown in study after study to improve endothelial function (which is the health of the inner lining of your blood vessels), reduce oxidative stress, lower blood pressure, and improve the flexibility of your arteries. Blueberries, in particular, contain a group of polyphenols called anthocyanins that have some of the strongest evidence behind them for direct cardiovascular benefit — and the research suggests that eating them three or more times per week is associated with meaningful reductions in heart attack risk, especially in women.
Dark leafy greens bring folate to the party, which supports healthy homocysteine levels; beetroot brings nitrates that convert to nitric oxide in the body and help relax and dilate blood vessels; pomegranate offers punicalagins that are among the most potent antioxidants measured in any food. This is a treasure chest, and most of us are leaving it largely unopened.
Blood sugar balance and why it matters for a healthy heart
This is a section that surprises a lot of people who come to me thinking their main heart health task is managing cholesterol — because the connection between blood sugar regulation and cardiovascular risk is profound and significantly underappreciated in mainstream conversations about heart health.
Chronically elevated blood sugar, even at levels well below a diabetes diagnosis, drives a process called glycation, where sugar molecules attach to proteins and fats in the body in ways that damage them, including the proteins that make up the walls of your arteries. It also drives insulin resistance, which is associated with higher triglycerides, lower HDL cholesterol, increased inflammation, and a cluster of metabolic risk factors that collectively raise cardiovascular risk substantially.
The personalised angle here is particularly interesting, because research — including the fascinating work coming out of the Weizmann Institute in Israel on personalised blood glucose responses — has shown that different people can have wildly different blood sugar responses to exactly the same foods, based on their gut microbiome, their genetics, their sleep patterns, their stress levels, and even the order in which they eat different foods at a meal.
Eating vegetables and protein before carbohydrates at a meal, for example, has been shown in several studies to blunt the blood sugar spike that follows, which has direct relevance for heart health over the long term.
Choosing whole, intact grains over refined ones, eating legumes regularly, and being mindful of the glycaemic context of your overall diet are all practical steps that most people can implement without anything remotely resembling deprivation.
Sodium, potassium, and the blood pressure balancing act
Blood pressure is one of the most modifiable cardiovascular risk factors there is, and nutrition plays an enormous role in it — however the conventional advice to ‘just eat less salt’ is, again, an oversimplification that doesn’t serve everyone equally. While it is true that excess sodium from highly processed foods is a genuine issue for many people’s blood pressure, what the research shows with increasing clarity is that the ratio of sodium to potassium in the diet may be even more important than sodium intake in isolation.
Potassium — found abundantly in bananas, sweet potatoes, spinach, avocados, edamame, coconut water, and white beans — acts as a natural counterbalance to sodium in the body, helping the kidneys excrete excess sodium and relaxing the walls of blood vessels.
The DASH diet — Dietary Approaches to Stop Hypertension — is built around exactly this principle, and it consistently ranks among the most evidence-backed dietary approaches for blood pressure management, emphasising fruits, vegetables, whole grains and lean proteins while minimising processed foods and added sugars.
Magnesium also plays an important supporting role here, acting as a natural relaxant for smooth muscle tissue including the muscle in your artery walls — and the foods richest in it, like dark chocolate, pumpkin seeds, cashews, leafy greens, and legumes, are the kinds of foods that deserve a permanent home in any heart-conscious kitchen. Do note – it’s important to ensure the presence of calcium and vitamin D to be able to optimally absorb magnesium, which is where regular, high quality supplementation has a place. This is an area of passion for me, not least because quality isn’t guaranteed with much of what’s commercially available – so do reach out if you’d like some pointers on the best way to select one worth taking.
The role of meal timing and eating patterns in heart longevity
One of the most genuinely exciting frontiers in nutrition science right now is the study of chrononutrition — the idea that not just what you eat, also when you eat it matters significantly for metabolic and cardiovascular health. Our bodies operate on circadian rhythms, and those rhythms influence everything from insulin sensitivity to blood pressure patterns to the inflammatory activity of our immune cells, and it turns out that eating in alignment with those rhythms — broadly speaking, concentrating more of your food intake in the earlier part of the day and avoiding large meals close to bedtime — may have real and meaningful benefits for heart health that go beyond simply managing calories.
Time-restricted eating — where you confine your eating window to roughly eight to ten hours during daylight hours — has shown promising results in early studies for reducing blood pressure, improving fasting blood glucose, and supporting healthy cholesterol levels, though this is very much an area where individual variation is significant and where the approach suits some people’s lives much better than others. What is clearer and more universally applicable is that eating the majority of your food while you are physically active and allowing your body a meaningful overnight fasting window of at least twelve hours is something that the research continues to support as broadly beneficial for metabolic and cardiovascular health, without requiring any extreme or difficult changes for most people.
Practical steps to start building your personalised heart health plate
So what does all of this actually look like in practice, when you’re standing in your kitchen at seven in the morning or trying to make sense of a restaurant menu?
Here are a few pointers, having worked with so many people on exactly this – start with the foundation that the evidence most consistently supports — abundant, varied vegetables and fruits (aiming for at least five to seven different kinds per day across a variety of colours), whole grains over refined ones (if at all), legumes as a regular protein source, oily fish once per week if you eat fish, extra virgin olive oil as your salad oil or cooking fat (at low temps) with eg coconut oil as your primary cooking fat, nuts and seeds as snacks and meal components, and dramatically fewer ultra-processed foods. This foundation alone would represent a profound shift for most people living in the Western world, and the heart health benefits of it are not subtle.
Beyond this foundation, start spotting how your own body responds — not through obsessive tracking, rather through genuine curiosity. Notice how you feel after different meals – your energy, your mood, your digestion, your sleep. Consider getting some baseline blood work done so you know where your cholesterol fractions, your inflammatory markers like hsCRP, your blood glucose and HbA1c, your blood pressure, and your homocysteine levels actually sit — because it’s challenging to personalise something you haven’t measured. And then, if you have the means and the interest, explore what functional testing or working with a knowledgeable practitioner might reveal about your individual nutritional needs, your microbiome, and any genetic factors that might be influencing how specific foods affect you.
Your heart is extraordinarily resilient and responsive — and it is never too late, or too early, to start feeding it with the intelligence and personalisation it deserves.
A final thought
Heart health and longevity are not destinations you arrive at through a single dramatic gesture — they are the accumulated result of thousands of small, daily, nourishing choices made with knowledge, self-awareness, and a genuine love for your own body.
Perhaps the science of personalised nutrition is not here to overwhelm you with complexity; maybe it is here to remind you that you are not just a statistic, that your biology is unique and fascinating, and that the food you eat every single day has the power to write a very different story for your heart than the one that might have felt inevitable.
This is a remarkable thing — and it belongs to you entirely.
See you on this week’s #AlivewithFi 🙂
Fi Jamieson-Folland D.O., I.N.H.C., is The LifeStyle Aligner. She’s an experienced practitioner since 1992 in Europe, Asia and New Zealand as a qualified Osteopath, Integrative Nutrition Health Coach, speaker, educator, writer, certified raw vegan gluten-free chef, and Health Brand Ambassador.
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1 Research reference – ‘Mediterranean diet in older adults – cardiovascular outcomes and mortality from observational and interventional studies — a systematic review and meta-analysis’ (Nutrients, November 2024) –
https -//pubmed.ncbi.nlm.nih.gov/39599734/