Day 50 of No Sugar. In New York. At 9pm.

I gave up processed sugar for 100 days. A personal challenge. No cakes, no sweets, no hidden sugars. Clean eating, every day, no exceptions.

I was 50 days in when I landed in New York.

New York is not a city that respects your dietary commitments.

There's food on every corner. Literally every corner. Pizza by the slice. Bakeries with the door open. Street vendors selling pretzels and churros. Delis with pastries stacked in the window. The entire city smells like something you shouldn't eat.

For the first few days, I was fine. My willpower held. I found clean protein. I planned meals. I stayed disciplined.

By day four, it started to crack. Not in the morning. In the evening.

The 9pm Problem

Every evening in New York followed the same pattern. I'd have a full day of meetings, content filming with Shawn, walking 15,000 steps through Manhattan. By 9pm I was exhausted, jet-lagged, and starving.

And that's when the pizza won.

Not because I didn't care about the challenge. Because my brain had been making decisions all day in a foreign city on a disrupted body clock, and by 9pm it had nothing left to resist with.

This is the thing nobody tells you about willpower: it runs on the same fuel as decision-making. The same prefrontal cortex that decides on your marketing strategy, your meeting agenda, and your children's school logistics is the same system that says no to the donut.

When decision fatigue hits, your brain doesn't just make worse decisions. It stops resisting bad ones.

The Double Hit

What made New York particularly hard was the combination of two forces:

• Choice overload. In Singapore, my food environment is controlled. I eat the same things, from the same places. In NYC, every meal was a decision tree. What restaurant? What dish? Does it fit my sugar-free challenge? Is there hidden sugar in the sauce? Can I trust the menu description?

• Decision fatigue. By evening I'd been making thousands of decisions in a high-stimulus environment on a jet-lagged brain. My capacity to evaluate and resist was gone.

It wasn't the pizza that broke me. It was the 30,000 decisions that came before the pizza. The donut at 9pm doesn't stand a chance against a brain that's been running flat out since 6am on the wrong time zone.

What I Learned

• Plan food like you plan meetings. When you're travelling, decide what and where you're eating before you're hungry. Morning brain picks the restaurant. Evening brain just shows up.

• Willpower is a morning resource. If you're doing something that requires discipline, like a dietary challenge, protect it by reducing every other decision load you can.

• Forgive the evening version of yourself. If you broke a commitment at 9pm after a full day, that's not failure. That's biology. The question isn't why you gave in. It's what you can change about the day so your evening brain isn't so depleted.

I’ve almost finished the 100 days. I'm proud of that. But I'm honest about the fact that New York nearly broke it. Not because I was weak. Because decision fatigue and willpower share the same tank, and nobody told me that before I understood the science.