Question 1

What can I drink during IF? Will it break my fast?

Accepted Answer

During the fasting window, you can only consume zero-calorie beverages: plain water, black coffee (no sugar/milk), plain tea, and unsweetened sparkling water.

Warning: Bone broth, BCAAs, protein powder, or even a splash of milk will immediately trigger an insulin response and break your fasted/autophagy state.

Question 2

What is 'Autophagy'?

Accepted Answer

Autophagy (the focus of the 2016 Nobel Prize in Physiology) is the body's self-cleaning process. After an extended period without external energy (typically 16+ hours), cells actively engulf and break down damaged proteins, old organelles, and toxins for recycling. This is the core reason IF is considered to have powerful anti-aging and anti-inflammatory effects.

Question 3

What if I chose 16:8 but changed my eating time?

Accepted Answer

IF is very flexible. What matters is the continuity of the fasting period, not the exact clock time. If you ate an hour later tonight (finished at 9 PM), simply push your first meal tomorrow by one hour (eat at 1 PM) to maintain a full 16-hour fast.

Question 4

Can I do strength training or intense exercise while fasting?

Accepted Answer

Absolutely, and it can be very beneficial. Fasted Training greatly improves insulin sensitivity and fat-burning efficiency. Since blood sugar is low, consider a black coffee pre-workout for a boost. The ideal setup: train at the end of your fasting window, then immediately enter your eating window with quality protein and carbs for muscle repair.

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