Is there a general definition what consists a fasted state? The medical literature I have read so far uses the term ambiguously, i.e. from overnight abstinence to 2h of no food intake. Is there a general accepted definition and can this state be objectively measured or is it measured by questionnaire / adherence to protocol?

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    – Carey Gregory
    Commented Jun 30, 2022 at 3:55
  • What do you need the fastet patient for? For anaesthesia, usually at least 6h after a meal and 2h after fluid intake are required. For blood tests, in a hospital you usually do them early in the morning before breakfast (so ~8-12h after the last meal intake).
    – Narusan
    Commented Jul 2, 2022 at 8:17
  • I'm studying the literature of EGCG toxicity of solid green tea extracts..a fasted state seems to be a risk factor for adverse effects.. Commented Jul 2, 2022 at 10:59


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