You eat well, you stay active, and you live in one of the sunniest cities in Europe. So why might your body still be running low on key nutrients? Here are 5 common gaps — and the easiest ways to close them.
Lisbon has one of the best food cultures in the world. Fresh seafood, seasonal produce, olive oil on everything — it’s practically a longevity diet by default.
But even with all of that, there are a handful of nutrients that consistently show up as low when we look at bloodwork — not just in Lisbon, but across modern lifestyles everywhere. The good news is they’re all easy to fix once you know what to look for.
1. Magnesium
Why it matters: Magnesium is involved in over 300 processes in your body — from sleep quality and stress regulation to heart rhythm and blood sugar control. It’s one of the most important minerals for longevity, and one of the most commonly depleted.
Why you’re probably low: Modern farming has stripped magnesium from soil, so even “healthy” diets often fall short. Stress, coffee, and alcohol all burn through it faster. And standard blood tests usually miss the deficiency entirely — your body pulls magnesium from cells to keep blood levels looking normal.
🍽️ Easy fix: Pumpkin seeds, dark chocolate (85%+), almonds, spinach, and avocado. A handful of pumpkin seeds with your afternoon coffee is one of the simplest health upgrades you can make.
2. Vitamin D
Why it matters: Vitamin D supports your immune system, bone health, mood, and even cancer prevention. Low levels are linked to fatigue, frequent illness, and increased inflammation.
Why you’re probably low: This one surprises everyone in Lisbon — you’d think all that sunshine would be enough. But if you work indoors, wear sunscreen (as you should), or have darker skin, you’re likely not making enough. We see suboptimal levels in the majority of clients, even in summer.
🍽️ Easy fix: Wild salmon, sardines, egg yolks, and mushrooms left in sunlight for 30 minutes before cooking. If your levels are below 50 ng/mL, a D3 + K2 supplement makes a big difference.
3. Omega-3 Fatty Acids
Why it matters: Omega-3s are your body’s best natural anti-inflammatory. They protect your heart, support brain function, and keep your cell membranes flexible and healthy. A low omega-3 to omega-6 ratio is one of the strongest predictors of chronic disease.
Why you’re probably low: Even in Portugal, where seafood is everywhere, most people don’t eat enough of the right types. Farmed fish has far less omega-3 than wild-caught. And the modern diet is loaded with omega-6 from seed oils and processed food, which throws off the balance.
🍽️ Easy fix: Wild-caught sardines, mackerel, anchovies, and salmon — at least 3 times a week. Portugal makes this easy: grab a tin of quality sardines, toss them on sourdough with olive oil and lemon. Done.
4. Iron (Especially for Women)
Why it matters: Iron carries oxygen to every cell in your body. Low iron — measured by ferritin on your bloodwork — shows up as fatigue, brain fog, poor exercise recovery, and feeling cold all the time. It’s the number one nutrient deficiency worldwide.
Why you’re probably low: Women of reproductive age lose iron monthly and rarely eat enough to replace it. Plant-heavy diets can make it harder to absorb. And even “normal” ferritin levels (above 12) often aren’t optimal — most longevity-focused practitioners want to see you above 40.
🍽️ Easy fix: Grass-fed red meat, liver, lentils, and dark leafy greens. The trick is pairing plant-based iron with vitamin C — squeeze lemon over your spinach, or eat bell peppers with your lentils. It dramatically boosts absorption.
5. B12
Why it matters: B12 is essential for energy production, nervous system health, and DNA synthesis. Deficiency can mimic depression, cause memory problems, and lead to irreversible nerve damage if left unchecked.
Why you’re probably low: B12 is only found in animal products, so vegetarians and vegans are at high risk. But even meat-eaters can be low — absorption decreases with age, and common medications like antacids and metformin interfere with it. It’s one of those nutrients where “normal” lab ranges are set too low.
🍽️ Easy fix: Shellfish (clams are the richest source), sardines, eggs, and grass-fed beef. If you’re over 50 or follow a plant-based diet, supplementation is worth discussing with your practitioner.
The Common Thread
Notice a pattern? Most of these nutrients are abundant in the traditional Portuguese diet — sardines, leafy greens, quality meats, eggs, and sunshine. The problem isn’t that the right foods don’t exist here. It’s that modern habits (working indoors, eating processed food, chronic stress) have quietly created gaps that even good intentions can’t always fill.
The fastest way to know where you stand is simple: get your bloodwork done, and look beyond the “normal” ranges.
Ready to close the gaps? At Longevity Kitchen Lisbon, we build personalised nutrition plans around your actual bloodwork — not guesswork. Every meal is designed to target the nutrients your body needs most. Book a free consultation to get started.