Ollie Whitby

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Ollie Whitby πŸŽ“ Doctoral Researcher | MSc, BSc (BioSci)
🧬 Simplifying the science of healthy aging
πŸ“˜ Join my weekly newsletter πŸ‘‡

https://longevitycode.substack.com/welcome

06/11/2026

I’m in my late twenties. Why do I care about longevity?

I’ve spent the last decade studying biology and aging, and one thing has become clear:

How we feel and function in our 60s, 70s and 80s is largely shaped by the small decisions we make daily, starting as early as our 30s and 40s.

The problem is that most people don’t actively think about this. Or they think they’re doing the right things when the research suggests otherwise.

I started Longevity Code to help close this healthspan-lifespan gap by sharing the lifestyle strategies that matter most, backed by the latest research.

πŸ’¬ Comment ACTION if you’d like the link to check it out 🧬

04/11/2026

19 lifestyle habits I’m prioritising as a bioscientist studying aging.

They’re in no particular order.

Each is based on the best evidence we have, much of it observational, so it shows strong links rather than guarantees.

But here’s what I’m convinced of:

Aging well requires intentional choices that often go against the defaults of modern life.

πŸ‘‰ If you’d like simple, science-backed strategies for healthy aging in your inbox each week, comment INFO and I’ll send you the link to my newsletter πŸ‘¨β€πŸ”¬πŸ’¬

The 7 systems that shape how you age πŸ‘‡1) Your cardiovascular system2) Your muscles and bones3) Your brain4) Your immune ...
29/10/2026

The 7 systems that shape how you age πŸ‘‡

1) Your cardiovascular system
2) Your muscles and bones
3) Your brain
4) Your immune system
5) Your cells
6) Your gut microbiome
7) Your psychological health

Your 80s are being shaped right now.

πŸ‘‰ I’m breaking down the science-backed ways to help protect and strengthen each system in my new newsletter series.

πŸ’¬ Comment SEVEN and I’ll send you the link to join :)

After years studying the biology of aging, here’s what I eat in a day ↓I see food as one of the best investments you can...
29/10/2026

After years studying the biology of aging, here’s what I eat in a day ↓

I see food as one of the best investments you can make β€” not because it has to be expensive, but because it requires effort and intention.

Farm foods are great β€” but not essential. This is all supermarket food.

Breakfast β˜•οΈ
β†’ Oats (with whole milk)
β†’ Greek yoghurt (200g)
β†’ Blueberries + strawberries
β†’ 1 banana (slightly unripe)
β†’ Dark chocolate (85%)
β†’ Coffee
Β 
Lunch πŸ₯—
β†’ Beef burger patty (avoid charring)
β†’ Sweet potatoes
β†’ Mixed salad (spinach, rocket, tomato, carrot, olive oil)
Β 
Dinner 🍽️
β†’ Salmon fillets
β†’ Potatoes
β†’ Sauce = lemon, olive oil, garlic, onion
β†’ Broccoli (with butter)
β†’ I rotate protein sources β€” fish, eggs, chicken, and legumes (a staple in long-lived populations)

Snacks ➑️ Boiled eggs, green tea, dark chocolate, vegetable crisps.

βœ… Protein and fibre at each meal.
βœ… Micronutrient-dense (omega-3s, B12, folate).
βœ… Polyphenol-rich (berries, coffee, olive oil, cocoa, veg).

πŸ‘‰ Don’t stress too much about organic, grass-fed, or wild-caught.

πŸ‘‰ If you have access, great β€” but focusing on simple, whole foods and covering your key nutrients matters more.

πŸ‘‰ When you eat this way consistently, your energy stabilises, your inflammation drops, your brain functions better, and your rate of aging slows.

πŸ’Ύ Save this to come back to.

*If you want the full breakdown + the science behind it, it’s all in my free newsletter. Comment EAT and I’ll send it over.*

27/10/2026

The 33 foods I build my diet around as a bioscientist studying aging πŸ‘‡

Your overall dietary pattern matters far more than any individual food, and there are plenty of other great foods out there.

But building your meals around these makes it easier to cover key nutrients, fibre and polyphenols in good amounts.

I also aim for 30+ different plant foods per week, as greater plant diversity is associated with a more diverse gut microbiome.

To support a healthy gut environment, I also try to limit added sugars, refined carbs (white bread & pasta), alcohol, and salty processed snacks.

Save this post for your next food shop πŸ›’

Follow for more science-backed health content πŸ‘¨β€πŸ”¬πŸ§¬

21/10/2026

Simple, timeless health practices we should be incorporating more of ↓

1️⃣ Okinawa, Japan – Hara Hachi Bu 🍲

βœ‹ Stopping at 80% full prevents overeating & reduces metabolic strain.

βœ… Eat slowly & mindfully β€” & stop when you feel β€œno longer hungry” β€” not completely full.

2️⃣ Sardinia, Italy – Passeggiata πŸšΆβ€β™‚οΈ

⛰️ Sardinians stay active into old age by walking steep hills in their mountain villages.

πŸŒ™ The Passeggiata β€” an evening stroll after dinner β€” supports digestion, blood sugar, & social connection.

3️⃣ Ikaria, Greece – Mediterranean diet πŸ₯—

πŸ«’ Large studies link it with significantly lower rates of dementia & heart disease.

πŸ” Ultra-processed foods make up 55%+ of the standard American diet.

🐟 Focus on: olive oil, beans, vegetables, nuts, whole grains, & fish β€” high in fibre, healthy fats, & antioxidants.

4️⃣ Spain – Siesta culture 😴

πŸ’» Hustle culture means many of us push through exhaustion & burn out.

🧠 A short 20 min nap after lunch improves memory, lowers stress, & supports heart health.

5️⃣ Japan – Forest bathing 🌲

🌿 Just 20 minutes can lower inflammatory markers, stress hormones, & strengthen immunity (trees release phytoncides).

πŸ™οΈ Most of us now live indoors under artificial light, glued to screens.

βœ… Walk slowly through a park or forest, breathe deeply, & disconnect from your phone.

6️⃣ Nicoya, Costa Rica – Plan de vida 🌞

🧭 A β€œlife plan” or strong sense of purpose keeps people motivated and engaged into old age.

βœ… Reflect on what gives you purpose. Ask yourself:

- What am I good at and passionate about?

- Does it create a positive impact for others?

πŸ‘‰ Purpose can look different for everyone β€” from raising a family, to community work, to starting a new project.

For me, that purpose is educating you on the science of healthy aging & prevention.

I share it all in my newsletter β€” comment INFO if you’d like to check it out πŸ‘¨β€πŸ”¬πŸ§¬

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