No. It is not recommended to drink high-protein powder, soy milk, milk, and other caloric beverages during fasting.
When you want something to drink, you can choose sugar-free, milk-free black coffee, black tea, or boiled water, which are all essentially calorie-free. Still, zero-calorie drinks or sugar substitutes should be used with caution because some people may experience an insulin response, which can vary depending on individual metabolic conditions.
What is an insulin response?
An insulin response occurs when your body releases insulin after consuming food or drink. Even some zero-calorie drinks or artificial sweeteners can cause this response in certain people, disrupting fasting.
What are metabolic conditions?
Metabolic conditions refer to how each person’s body processes food and regulates energy. For example, someone with insulin resistance may release more insulin in response to even small amounts of certain foods or drinks, like diet sodas.
In short, individual differences mean some people might still have an insulin response to what seems like a "safe" fasting beverage, so it’s important to observe how your body reacts.
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