Fasting question
Does protein shake break a fast?
Short answer
A protein shake breaks a fast because it contains calories and amino acids.
Step by step
1
Decide if your fast is strict, practical, medical, or religious.
2
Check whether protein shake contains calories, sugar, protein, fat, or sweeteners.
3
If unsure, keep the fasting window simple and move protein shake to your eating window.
Example
Use Fast Goblin notes to mark gray-area choices like protein shake, then compare hunger and consistency over a few fasts.
Related questions
Questions
Does protein shake break a fast?
A protein shake breaks a fast because it contains calories and amino acids.
Safety note: Educational only. People who are pregnant, breastfeeding, under 18, have diabetes, take glucose-affecting medication, have a history of eating disorders, or feel unwell should speak with a qualified clinician before fasting.
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