Your Fast-Breaker Toolkit
Fast answers. Less fasting paperwork.
Choose your fasting goal and search 95+ common drinks, sweeteners, supplements, medications, foods, and suspicious loopholes.
- 1Choose your goal
- 2Search the item
- 3Save repeat offenders
Does this break my fast?
Choose a goal. Search an item.
The ingredients do not change, but the useful answer can. A splash of cream is a different problem for appetite control than it is for a deliberately clean fast.
Choose the lens Fred should use
What changes? Clean and strict lenses can change the verdict colour. Practical and sugar-awareness lenses often keep the same colour but change what Fred tells you to watch.
What “breaks a fast” means here: whether an item fits the fasting rule you selected. It does not mean insulin, ketosis, or autophagy switches instantly on or off.
This tool cannot predict personal glucose responses or replace medical guidance. If you are pregnant or breastfeeding, have an eating-disorder history, manage diabetes or another medical condition, or take medicine that may require food, check your plan with a qualified professional.
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Optional support
The tool is free. The coffee is optional.
Fasted Fred is free to use. If you’d like to support the project, the coffee button is there. Completely optional.
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Help improve the next update
Fred missed something?
Send the exact product or item. The current search and your selected fasting goal will be included automatically.
Brand names, mystery powders, creamers, gum, electrolyte packets: this is where the next database update comes from.
New to Fasted Fred?
Meet the man interrogating your coffee.
Fasted Fred turns confusing fasting and body science into short, visual explainers. Come for the useful answers. Stay because Brain and Stomach are one disagreement away from workplace mediation.
Evidence-informed. Fred-translated.
How Fred decides
Fred does not ask, "Can I technically get away with this?" He checks what enters the body, what it may trigger, and whether it supports the fast you are actually trying to do.
- Energy Does it bring in meaningful calories?
- Building blocks Does it contain protein or amino acids?
- Sugar Does it contain sugar or fast-digesting carbs?
- Appetite Does sweetness make this particular fast easier or harder to follow?
- Your goal Are you using a practical, clean, or strict zero-calorie rule?
- Context check Could medication or health context change the answer?
Verdicts are practical compatibility rules based on product labels and established nutrition principles, not diagnoses or guarantees about a biological response. Read the methodology and sources. Last reviewed June 13, 2026.
What should Fred simplify next?
The chart protects the fast. The next tool should make it easier to follow.
Vote for the fasting problem you most want solved: starting your first fast, choosing a window, setting coffee rules, handling hunger, protecting muscle, or planning the first meal.