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

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§¬

20/10/2026

By 2050, dementia cases are projected to triple - from 57 million to 153 million.

Age and genetics are key risk factors.

But research suggests up to 45% of cases may be preventable or delayed through lifestyle factors.

πŸ”¬ After years studying the biology of Alzheimer’s, these are the habits I’ve realised matter most πŸ‘‡

1️⃣ Move your body daily πŸšΆβ€β™€οΈ

πŸ‘‰ People who are regularly physically active have a 20-28% lower risk of dementia.

πŸ‘‰ Movement improves blood flow to the brain, reduces inflammation, & increases BDNF (a protein that strengthens brain connections).

πŸ‘‰ Aim for:
β†’ 150 mins/week of moderate activity (brisk walking, hoggincycling)
β†’ Strength train 2x/week
β†’ Break up long periods of sitting

2️⃣ Mediterranean-style diet πŸ₯—

πŸ‘‰ Linked to a 20-40% lower dementia risk.

πŸ‘‰ Focus on fatty fish, eggs, berries, leafy greens, olive oil, nuts, legumes.

πŸ‘‰ Limit ultra-processed foods & refined sugar.

3️⃣ Protect your sleep πŸ’€

πŸ‘‰ During sleep, inflammation is regulated, cell repair increases, & the brain clears Alzheimer’s-related proteins through the glymphatic system.

πŸ‘‰ Aim for 7-8 hours at consistent times, & avoid bright lights & heavy meals close to bed.

4️⃣ Keep your brain active πŸ“š

πŸ‘‰ New & challenging mental activity helps build cognitive reserve – your brain’s ability to cope better with age-related changes.

πŸ‘‰ The strongest form? Social interaction - it engages attention, memory, & language all at once.

πŸ‘‰ Also helpful: Learning a language or instrument. Reading. Solving puzzles. Strategy games. Clubs/group activities.

5️⃣ Address risk factors 🦻

β†’ High blood pressure
β†’ Excess body fat
β†’ Hearing loss (untreated)
β†’ Smoking
β†’ Heavy alcohol use

πŸ‘‰ All linked to higher risk of cognitive decline & dementia.

If you found this helpful, you’ll love my weekly newsletter. πŸ“§

I share simple, science-backed strategies for healthier aging β€” everything I’m learning through my research, broken down practically.

πŸ’¬ Comment INFO for the link :)

16/10/2026

Healthy aging tips from a bioscientist 🧬

The healthiest agers aren’t the ones optimising every aspect of their lives. They’re the ones who have the ordinary basics nailed down β€” but with extraordinary consistency.

You don’t need to do everything. I just wanted to share as much value as possible in 60 seconds.

1. Sleep is the foundation
2. 7-9 hours
3. Same time every night
4. No food 3 hours before bed
5. Get morning light
6. Exercise is closest thing to a longevity drug
7. Lift weights twice a week
8. Build cardio fitness & strength
9. Walk 10 mins after meals
10. Avoid prolonged sitting
11. Nose breathing > mouth
12. Sauna is great
13. Eat fruit, veg, nuts, beans, fish
14. Limit added sugar
15. Eat fermented foods
16. Invest in a good quality EVOO
17. Green tea & coffee are healthy
18. Get enough fibre
19. Stay socially connected
20. Find your purpose
21. Keep learning
22. Learn to manage stress daily
23. Limit social media use
24. Get into nature often
25. Treat hearing or vision loss
26. Alcohol isn’t healthy
27. Limit microplastic exposure
28. No bright lights after sunset
29. Read a physical book before bed
30. Basics > complex routines

Follow for more simple, science-backed tips for healthy aging πŸ§‘β€πŸ”¬πŸ§¬πŸ™

08/10/2026

As a bioscientist studying aging, I’ve looked at a lot of the research on daily steps β€” and large observational studies consistently show that the biggest gains come from going from very little movement to getting regularly active.

Around 7,000+ steps a day appears to be a great target for healthy aging, and pushing beyond 10,000 doesn’t seem necessary for most people.

More isn’t always better β€” doing above average numbers consistently matters far more than chasing a huge step count.

Follow me for more simple, science-backed strategies for healthier aging πŸ§‘β€πŸ”¬πŸ§¬

After years studying biology, immunology and aging, these are the things I’ve come to prioritise in my own day-to-day li...
08/10/2026

After years studying biology, immunology and aging, these are the things I’ve come to prioritise in my own day-to-day life for better health:

β˜€οΈ Light is information.
😴 Sleep is the foundation.
🦠 Gut health is central.
πŸƒ Movement is perhaps our greatest longevity tool.
πŸ“± And modern life’s constant digital stimulation is something we should probably be doing more about.

Comment HILLS and I’ll send you the full breakdown in my newsletter πŸ’¬πŸ§‘β€πŸ”¬πŸ§¬

Last week, I had my blood markers tested, and one result caught my attention.My hs-CRP - a marker of low-grade inflammat...
29/09/2026

Last week, I had my blood markers tested, and one result caught my attention.

My hs-CRP - a marker of low-grade inflammation - was just 0.3 mg/L.

Chronic inflammation is involved in many diseases of aging, and it’s highly modifiable.

Here are 5 evidence-based daily habits I practise that I believe have helped keep mine low πŸ‘‰

Extra-virgin olive oil is rich in healthy fats and polyphenols which help regulate oxidative stress and inflammatory pathways.

It’s the backbone of the Mediterranean diet - consistently associated with longevity πŸ«’

Greek yoghurt contains live microbes - the good bacteria that may help improve gut microbiome diversity and regulate inflammation.

Bonus: Add blueberries to your morning yoghurt bowl for their anthocyanins - plant compounds with antioxidant and anti-inflammatory effects 🫐

Consistent sleep timing, duration, and good sleep quality are all vital for regulating the immune system and keeping inflammation in check 🧬

Muscle contractions help clear glucose from your blood and release signals that regulate inflammation.

I aim to move throughout the day - not just for an hour at the gym πŸšΆβ€β™€οΈ

Good relationships are good for your biology.

Loneliness or toxic relationships can have the opposite effect.

Comment INFLAMMATION for the full breakdown in my newsletter πŸ‘¨β€πŸ”¬πŸ’¬

28/09/2026

As a bioscientist, I truly believe what happens in the first 90 minutes of your day matters more than most people realise.

You don’t need to optimise every minute β€” these are just the biologically supportive non-negotiables I try to tick off most mornings.

And just as importantly, I want to enjoy my mornings β€” having time to slowly drink a coffee with a loved one, or just do something I enjoy, rather than rushing out the door.

Follow for more simple, science-backed health and longevity tips like these πŸ§‘β€πŸ”¬πŸ§¬

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