These ranges are general educational estimates designed to give you a practical daily target — not a rigid rule or prescription.

Many adults unintentionally underfuel earlier in the day due to busy schedules, stress, hyperfocus, caregiving demands, inconsistent routines, or relying on caffeine to push through fatigue.

For some people, this can contribute to:

afternoon crashes
brain fog
intense evening hunger
nighttime snacking
low energy
difficulty focusing

The “before 3 PM” goal is based on a typical daytime schedule where someone wakes between approximately 5–7 AM and eats dinner between approximately 5–7 PM.

If you work shifts, work nights, wake later, or have an unconventional schedule, this timing may need to be adjusted. The overall goal is simply to fuel earlier and more consistently throughout your waking hours.

This is not about perfection, strict tracking, or eating perfectly. For many adults, simply increasing nourishment earlier in the day can help support steadier energy, focus, fullness, and appetite patterns throughout the evening.