16/09/2026
There are cells in your eyes that have nothing to do with vision. They read light, and they wire straight into the master clock in your brain — the clock that sets the timing for your thyroid, your pancreas, and your fat cells.
Now think about a normal day.
Indoors from morning to night. Screens from breakfast to bed. Nowhere near enough light to tell your brain it’s daytime — and far too much at night to tell it that it isn’t.
Your clock never gets a clean signal.
So melatonin doesn’t rise properly. And when melatonin doesn’t rise, leptin doesn’t either.
Leptin is your master hormone for energy. Made by your fat cells, it tells your brain how much fuel you’re carrying. It’s meant to peak at night, in the dark, while you sleep. That’s the message that says: we have enough.
Flatten it and your brain hears something else entirely.
We are starving.
So it does what it should. Hunger goes up. Cravings run toward sugar. Your body quietly burns less.
Here’s how it shows up.
No appetite in the morning. Coffee instead of food. Then by evening you’re hungry in a way that doesn’t match what you ate. Standing at the fridge at 10pm.
Hunger that goes missing in the morning and shows up at night isn’t a willpower problem. It’s a timing problem.
Is your hunger inverted?
You were not weak. You were miscued.
This is why leptin is one of the first markers I run with clients. It tells me about light, rhythm and stress — not just metabolism.
And before I reach for a single supplement, I ask for this:
☀️ Sunrise in your eyes within 30 minutes of waking
🌅 Watch the sunset
🕯️ Overheads off after dark. Lamps low and warm
📵 Screens dimmed or gone
👧 Kids outside before school and after
You cannot supplement your way out of a light problem.
