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. 2021 Sep 28;8:708069. doi: 10.3389/fnut.2021.708069

Table 4.

Self-reported symptoms before and after 10 fasting days and self-estimated chronic body discomfort before and after 4 weeks of food reintroduction.

Fasting effects Before After 10 days After 4 weeks
Self-reported symptoms, mean ± SD
Fatigue 4.1 ± 2.8 1.3 ± 2.1*** ND
Sleep Disorder 2.5 ± 2.9 1.6 ± 2.3** ND
Headache 2.0 ± 2.9 0.1 ± 0.4*** ND
Hunger 2.0 ± 2.4 0.8 ± 1.7*** ND
Back pain 1.0 ± 2.0 0.8 ± 1.8 ND
Nausea 0.2 ± 0.8 0.1 ± 0.3 ND
Estimated chronic body discomforts, n (p = 0.002)
Elevated 26 ND 13
Moderate 65 ND 55
Low 15 ND 33

ND, not determined. P-values are <0.01** and

p < 0.001***.