Intermittent fasting for beginners

Everything you need to start fasting this week — without the overwhelm, the dogma, or the mistakes that make people quit.

The Kairo Guide · 6 min read

Intermittent fasting is the simplest structured way of eating there is: you don't change what you eat first, you change when. That simplicity is why it sticks for so many people who've bounced off diets.

Step 1 — Start with 16:8 (really)

Fast 16 hours, eat within 8. In practice: finish dinner by 7 pm, skip breakfast, eat lunch at 11 am. You're asleep for half the fast. Harder schedules exist (18:6, 20:4, OMAD), but the best schedule is the one you keep — start gentle and step up later.

Step 2 — Ease in over a week

• Days 1–2: just stop eating after dinner. No night snacking is half the battle.
• Days 3–4: push breakfast one hour later.
• Days 5–7: push it another hour or two until you're at your window.

Step 3 — Handle hunger like a pro

Hunger comes in waves that pass in 10–20 minutes — it doesn't build forever. Ride the wave with water, black coffee, or tea. If you feel light-headed or headachy, that's usually low sodium, not low food: a pinch of salt in water fixes most of it.

Step 4 — Make your window count

Lead every meal with protein and add fibre (vegetables, legumes, whole grains). That combination flattens the hunger curve so tomorrow's fast is easier than today's. Break your fast gently — water first, a little protein, then your real meal.

The three mistakes that make beginners quit

• Starting too aggressive — jumping to 20:4 on day one. Start 16:8, maybe even 14:10.
• Ignoring salt — most early misery is electrolytes, not hunger.
• Feasting on junk — a fasting window doesn't outrun a window full of ultra-processed food. It's a structure, not a free pass.

Who shouldn't fast

Skip fasting (or get medical guidance first) if you're pregnant or nursing, under 18, have diabetes or take blood-sugar medication, or have a history of disordered eating.

General information only, not medical advice. Consult a healthcare professional before starting any fasting routine, especially if you are pregnant, under 18, have a medical condition, or a history of disordered eating.