When people don't eat for 3 days, the blood flow to their arms increases significantly, almost doubling from normal levels.
Scientific Claim
Acute starvation for 72 hours in healthy young adults is associated with a progressive increase in forearm blood flow, with a doubling of flow from 3.32 to 6.21 mL/100 mL per minute, suggesting vascular adaptations during fasting.
Original Statement
“FBF rose progressively from 3.32 to 4.87 to 6.21 mL/100 mL per min (time effect P < 0.001, ANOVA). FBF at 36 h was greater than at 12 h (P < 0.001) and that at 72 h was greater than the 36 h value (P = 0.003).”
Evidence Quality Assessment
Claim Status
appropriately stated
Study Design Support
Design supports claim
Appropriate Language Strength
association
Can only show association/correlation
Assessment Explanation
The study design (cohort study) can describe associations between starvation and physiological changes. The claim uses 'is associated with' which appropriately reflects the observational nature of the study.
Evidence from Studies
Supporting (1)
The cardiovascular, metabolic and hormonal changes accompanying acute starvation in men and women