I Tried the Blue Zones Diet for 3 Months: Here’s What Happened to My Energy Levels
- gutasales
- Mar 30
- 4 min read
Quick note before we start: This is just my personal experience, not medical advice. I’m not a doctor just someone who got tired of feeling well, tired.
By 3 PM every single day, I’d hit a wall.
Not a gentle slowdown. A full crash.
I’d reach for my third cup of coffee, stare at my screen, and promise myself “tomorrow will be different.” It never was.
That’s when I stumbled across the Blue Zones approach popularised by Dan Buettner and decided to try it for 3 months. No extremes. Just simple shifts: eating more beans, more whole foods, and stopping at 80% full (that Hara Hachi Bu rule).
I didn’t expect much.
But by week six something changed.
Does the Blue Zones Diet Improve Energy? (Quick Answer)
From my experience, yes but not in a “high-energy, buzzing” way. It felt more like a steady, calm energy that lasted all day, without crashes or jitters.
Why I Trashed My Caffeine Habit for Purple Sweet Potatoes
It sounds dramatic, but it really started with exhaustion.
I remember sitting at my desk one afternoon, coffee in hand, realising I wasn’t even enjoying it anymore. I needed it just to function.
So I made one small change first:
Instead of grabbing caffeine at 3 PM, I started eating:
Roasted purple sweet potatoes
A handful of nuts
Sometimes lentil leftovers (yes… really)
The first week? Rough.
I missed that caffeine hit. I even felt a little grumpy without it. But something surprising happened I didn’t crash as hard.
By week three, I wasn’t reaching for coffee at all.
Not because I was disciplined… but because I didn’t feel like I needed it.
The ‘Hara Hachi Bu’ Struggle: Learning to Stop at 80% Full
This was the hardest part. No question.
The idea is simple: stop eating when you’re 80% full, not stuffed.
In reality? It felt like punishment at first.
I was used to finishing my plate. Always.
So halfway through meals, I’d sit there thinking:
“Am I still hungry or just used to eating more?”
Some days, I got it right.
Other days? I absolutely didn’t.
Especially when sourdough bread was involved. (Let’s be honest.)
But over time, something shifted:
I stopped feeling heavy after meals
My afternoon sluggishness started disappearing
I felt lighter not just physically, but mentally
Pro Tip (My Secret):
I started using smaller bowls and plates. It sounds silly, but it worked. I didn’t feel deprived and my brain didn’t panic.
My ‘Energy Timeline’: What Week 1 vs Week 12 Actually Felt Like
I didn’t track calories. I tracked how I felt.
Here’s the honest breakdown:
Week 1–2:
Cravings everywhere
Low energy (my body was adjusting)
Missing snacks… a lot
Week 3–5:
Fewer crashes
Still tempted by old habits
Digestion improved (huge bonus)
Week 6 (The Turning Point):
This is where it clicked.
I woke up one day and realised:
I hadn’t thought about coffee
I wasn’t exhausted
I felt steady
Not hyper. Not wired.
Just consistently awake.
Week 8–12:
Energy stayed stable all day
No afternoon slump
Better sleep (unexpected bonus)
The best way I can describe it is this:
A quiet, steady hum of energy instead of spikes and crashes
3 Budget-Friendly Longevity Staples I Now Can’t Live Without
Here’s the part I didn’t expect…
This way of eating actually saved me money.
I now always keep these stocked:
Beans & lentils (cheap, filling, versatile)
Oats (breakfast became simple and satisfying)
Seasonal vegetables (especially root veg like sweet potatoes)
I was spending less on:
Takeout
Snacks
Fancy “health” products
And more on real, basic food.
I easily saved about £30–£40 a week.
If you’re curious, this is exactly why I created a simple weekly energy tracker printable it helped me notice patterns I would’ve missed otherwise.
I created a simple 7-day tracker you can print and try yourself
The Social Cost: Eating ‘Blue’ in a Fast-Food World
No one talks about this part.
It’s awkward.
I remember going out with friends and ordering:
A salad with chickpeas
While everyone else had burgers and fries
The comments came fast:
“Are you on a diet?”
“That’s not enough food!”
“You’ve changed”
At first, I felt self-conscious.
But over time, I realised something:
I wasn’t restricting myself
I was choosing how I wanted to feel later
And that made it easier to stick with.
The Verdict: Was It Worth It?
Honestly?
Yes but not in the way I expected.
I didn’t become a different person.
I didn’t suddenly feel “perfect.”
But I did gain:
Stable, all-day energy
Fewer cravings
Better digestion
A calmer relationship with food
And maybe most importantly:
I stopped depending on caffeine just to function.
Would I do it again?
I already am just in a more flexible way.
FAQ: Real Questions I Had (and You Might Too)
Is the Blue Zones diet expensive?
Not at all. It’s mostly beans, grains, and vegetables. I actually saved money—around £30–£40 a week.
Did I lose weight?
Yes, but slowly about 4–5 pounds over 3 months. Nothing extreme, just gradual and natural.
What was my biggest ‘fail’?
A homemade bean soup that took 4 hours and tasted like absolutely nothing. I ate it anyway out of stubbornness.
If you’re thinking of trying this, start small. Even one Blue Zones-style meal a day can make a difference. And if you want structure, a simple weekly plan or tracker helps more than you think.
About the Author
Janerine Nevins Janerine Nevins is the founder of Pearlypetal and a Skin Health Investigator. She has a BSc in Health and Social Care and has spent the last ten years turning dermatological knowledge into useful rituals for women going through perimenopause and skin changes in midlife.
She is a parent, doesn't believe in skincare marketing, and would rather say what she got wrong than act like she always knew better. She writes for women between the ages of 35 and 55 who are tired of being given solutions and want genuine proof instead. She gives useful, honest advice based on her own experiences and daily routines to help women develop lasting energy, a balanced lifestyle, and natural health.
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