The Study
Effect of diet on the metabolic response to infection: protein-sparing modified fast plus 100 grams glucose and yellow fever immunization.
This study watched what happened to four people’s bodies when they ate a special diet and got a vaccine. It didn’t compare them to anyone else, so we can’t say the diet caused the changes — we just know what happened to those four people.
Analysis score
Maximum 44 for a cross-sectional study.
Where the score came from
When people eat mostly protein and no sugar, their body reacts one way to a vaccine; when they add sugar, it reacts differently.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 537 / 100
Quality score
Snapshots of a population at a single point in time, or descriptions of small groups. Can identify correlations and prevalence, but cannot determine cause and effect.
Key takeaways
Summary
Based on the study abstract and findings.
- 1Yes — this shows diet can change how your body handles even a mild infection like a vaccine, which might matter more during serious illness.
- 2With sugar added: glucagon rose on day 1.
- 3Without sugar: insulin and lactate rose, ketones fell.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
The American journal of clinical nutrition
Year
1981
Authors
B. Bistrian, D. George, G. Blackburn, R. Wannemacher
Related Content
Claims (6)
A protein-sparing modified fast reduces liver glycogen stores, lowers insulin levels, and increases the body's use of fat for energy.
In obese adults receiving a yellow fever vaccine, consuming 100 grams of glucose during a protein-sparing fast causes higher insulin and blood sugar levels and lower ketone levels than consuming the same fast without glucose.
In four obese adults on a specific low-protein, high-glucose diet for three weeks, receiving a yellow fever vaccine caused a measurable rise in glucagon levels on day one, and altered insulin, lactate, and ketone levels, showing that dietary composition changes how the body metabolically responds to infection.
In obese adults on a protein-sparing fast, receiving a yellow fever vaccine is linked to higher insulin and lactate levels and lower ketones, whereas adding 100 grams of glucose to the fast increases glucagon without raising insulin or lactate similarly.
In obese adults, receiving the yellow fever vaccine causes measurable changes in insulin, glucagon, lactate, and ketone bodies, and these changes differ when 100 grams of glucose are consumed with protein compared to when they are not.
In obese adults receiving a yellow fever vaccine, blood glucagon levels rise on the first day if they consume a low-protein fast with 100 grams of glucose, but remain unchanged if they consume the same fast without glucose.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.