Day 69 of my fasting journey. Yesterday I ate some biscuits — chocolate digestives, bit of Milka, some crisps. Nothing catastrophic. But this morning? Woke up with something I hadn’t experienced in weeks: non-stop food thoughts. That running commentary: “Wonder what’s for lunch. Could murder a sandwich. Is it dinnertime yet?”
This wasn’t hunger. This was different.
I’m on Day 69, well into fat adaptation, my hunger signals have been calm for weeks. Then one evening of ultra-processed foods, and suddenly my satiety dashboard’s showing nothing but static. Here’s what happened, why it matters, and what the science actually says about UPF and your hunger signals.
What Changed Overnight
For weeks my food thoughts had been quiet. I’d eat when I planned to eat, feel satisfied, move on with my day. Simple. Clear signals.
Yesterday was our Fake Christmas — family tradition where we get two celebrations instead of one. Grandson visiting, full roast dinner, trifles on standby. Proper cheat day. Nothing wrong with that.
But here’s what caught me off guard: while eating, I was already thinking about the next thing. That’s not normal satisfaction. That’s scrambled hunger hormones.
The snapshot: 3,700 calories over 10 hours. Roast dinner, trifles, crisps, chocolate. Twenty different plants tracked, which sounds impressive until you clock 154 grams of sugar alongside it.
And today? Brain won’t shut up about food. All day. Conscious food thoughts I hadn’t experienced since early in my journey.
The Bliss Point Problem
Dr. Andy Chan, nutrition researcher, explains ultra-processed foods are engineered to hit what’s called a “bliss point.” It’s a specific combination of sugar, fat, and salt designed to bypass your normal satiety signals.
Your brain stops registering fullness properly. You eat, the food registers, but the “I’m done” message never arrives. You just keep thinking about the next thing.
That’s exactly what happened yesterday. And today, my hunger hormones are still recalibrating from it.
This isn’t about willpower. It’s about biochemistry. UPF disrupts the feedback loop between your gut and your brain. The signals get scrambled. You’re left with constant low-level noise instead of clear hunger and clear satisfaction.
Two Different Types of Hunger
I used to think hunger was hunger. Something you just push through.
Turns out there’s different types. There’s genuine hunger after a fast — comes in waves, peaks around hours 16–20, then passes. Your body adapts, switches fuel sources, hunger settles down.
Then there’s this: constant background noise. Never fully satisfied. Always thinking about food. That’s not hunger. That’s hormonal disruption from ultra-processed foods. Your body’s asking questions it shouldn’t need to ask.
The difference is striking once you’ve experienced both. Real hunger has a rhythm. UPF-driven thoughts are just… static.
What Happens Next
Great sleep last night. Family day today. Genuinely enjoyed the meal. No regrets about Fake Christmas — it’s tradition, it’s connection, it’s life.
But the UPF effect is real. Two chocolate digestives yesterday, and my satiety dashboard’s completely recalibrated. Takes a few days to settle down once I’m back to real food and proper eating windows.
Not guilt. Just data. This is what happens when you introduce ultra-processed foods after weeks of metabolic clarity. The hunger hormones scramble. The food thoughts amplify. It passes, but it’s measurable.
By Monday, once I’m back to non-UPF meals and time-restricted eating, those signals will calm down again. I know this because I’ve tracked it before. Process over perfection. Always.
🎯 Key Takeaways
- UPF scrambles hunger signals — Ultra-processed foods bypass normal satiety cues, leaving you thinking about food constantly even when you’ve eaten enough
- There are two types of hunger — Genuine hunger after fasting comes in waves and passes; UPF-driven thoughts are constant background noise that doesn’t resolve
- Recovery takes 48–72 hours — Getting back to whole foods and structured eating windows restores normal satiety signals within a few days
Ready to Restore Your Satiety Signals?
If you’ve noticed your hunger signals feel scrambled, or you’re constantly thinking about food even after eating, it’s likely UPF disruption. The 14-Day Rhythm Reset helps you recalibrate those signals with simple, structured eating windows and real food.
👉 Get the 14-Day Rhythm Reset Guide (free)
💪 Want ongoing support? Join Rhythm Club for £30/month (includes FREE app access, community, and weekly accountability calls)
🔽 Read the Video Transcript
Brain won’t shut up about food. Day 69.
Happened overnight. Yesterday I had biscuits — proper ones, chocolate digestives, bit of Milka, some crisps. Nothing catastrophic. Woke up today, and for the first time in weeks, I’m getting conscious food thoughts. You know that running commentary? “Wonder what’s for lunch. Could murder a sandwich. Is it dinnertime yet?” Hasn’t been there for ages. Back now. All day.
This is our first Fake Christmas — family tradition, means we get two goes at it. Grandson’s here, full roast dinner planned, trifles on standby. Cheat day, absolutely. But here’s what I noticed: I’m not just enjoying it. I’m thinking about the next thing while I’m eating the current thing. That’s different. That’s the UPF talking.
Quick food snapshot: 3,700 calories over about 10 hours. Roast dinner, trifles, crisps, chocolate. Twenty different plants, which sounds virtuous until you realize it came with 154 grams of sugar. Not ideal.
Here’s the science bit. Dr. Andy Chan, nutrition researcher — he explains that ultra-processed foods are engineered to hit what they call a “bliss point.” Sugar, fat, salt combination that bypasses your normal satiety signals. Your brain stops registering fullness properly. You eat, but the “I’m done” message never arrives. That’s exactly what happened yesterday. And today, my hunger hormones are still scrambled from it.
Used to think hunger was hunger — just push through it. Turns out there’s different types. There’s genuine hunger after a fast — comes in waves, passes. Then there’s this: constant low-level noise, never fully satisfied, always thinking about food. That’s hormonal disruption from UPF. Your body’s asking questions it shouldn’t need to ask.
Great sleep last night, family day today, genuinely enjoying the meal. But the UPF effect is real. Two biscuits yesterday, and my satiety dashboard’s showing static instead of clear signals. Takes a few days to recalibrate. Not guilt — just data.
Want the 14-Day Rhythm Reset Guide? It’s free, walks you through exactly how to restore those satiety signals. Link’s in the description. Or join Rhythm Club for £30 a month — community, accountability, proper structure.
Day 69. Brain’s louder than it needs to be. I know why. And I know it’ll settle down by Monday once I’m back to real food and proper windows. Process over perfection. Always.
⚠️ Important: This is educational content based on evidence and personal experience. It is not medical advice. Speak to your GP before making changes to your fasting pattern, diet, or medication.
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