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Yes, light movement is fine before a fasting blood test, but skip hard workouts that can skew glucose, lipids, and certain enzymes.

Yes, most plain vitamins don’t break an intermittent fast, but gummies, oils, collagen, and sugary mixes add calories and end the fast.

No, sugar breaks an intermittent fast; stick to plain water, black coffee, or unsweetened tea during fasting windows.

No, intermittent fasting still works best when your eating window includes balanced meals and sensible portions.

Yes, white rice fits time-restricted plans—eat it in the feeding window; skip it while fasting, and mind portions and pairings.

Yes, you can eat unhealthy foods during intermittent fasting, but doing so undercuts weight, blood sugar, and heart health gains.

Yes, getting a vaccine while fasting is generally allowed and safe; non-nutritious injections don’t break the fast in most rulings.

No, eating tuna during a fast breaks the fasting period because calories and protein switch off fasting pathways.

Yes, stevia during a fasting window is generally fine, since pure stevia adds no calories and shows little to no effect on blood sugar or insulin.

No, during a strict fast, any rice intake breaks the fast because it supplies calories and triggers a metabolic response.