Cohort studycited by the Tayebat archiveabstract only checked★ key study A-WHT-07 in-depth review

Fast-acting carbohydrate diets and diabetes

Glycemic index, glycemic load, and risk of type 2 diabetes: results from 3 large US cohorts and an updated meta-analysis.

Overview

Bhupathiraju SN et al.. Am J Clin Nutr 2014 · PMID 24787496 · DOI 10.3945/ajcn.113.079533

Diets high in fast-acting carbs and low in cereal fibre linked to ~50% higher diabetes risk.

Does the study support the specific claim? Partly · Methodological quality: high

Study explained simply

What did the researchers want to find out?: GI/GL and diabetes
How was the study done?: Three cohorts + meta-analysis
How many people, animals or samples were studied?: 205,157 adults (sum of 3 cohorts: 74,248 + 90,411 + 40,498)
What was actually found?: Higher GI/GL linked to diabetes
How large was the observed effect?: GI +33%; GL +10%
What do the results mean in everyday life?: Carbohydrate quality matters
What are the study's limitations?: Observational
What does it say about Elawady's specific claim?: Supports fibre advice; applies to all high-GL foods
Do the results apply to Germany and Europe?: Moderate
What can explicitly not be concluded from this study?: Causation

Authors: Bhupathiraju SN, Tobias DK, Malik VS, Pan A, Hruby A, Manson JE, Willett WC, Hu FB
Journal: Am J Clin Nutr
Year: 2014
Identifier: PMID 24787496 DOI 10.3945/ajcn.113.079533 · PMC4144100
Verification: verified – PubMed E-utilities efetch, 2026-10-25
Retracted: no
Corrections: none
Extent checked: abstract only
Conflicts of interest and funding: None stated; NIH grants.

GI/GL and T2D

Study design: Cohort study – 3 prospective cohorts plus updated meta-analysis
Population: 74,248 NHS women, 90,411 NHS II women, 40,498 HPFS men
Country: USA (+ meta-analysis)
Period: 1984-2009
Sample size: 205,157 (74,248 NHS + 90,411 NHS II + 40,498 HPFS); 15,027 cases
Inclusion and exclusion criteria: Free of diabetes, CVD, cancer

Results: Highest vs lowest GI: +33% (95% CI 26-41%); GL: +10% (2-18%); high GI or GL combined with low cereal fibre: ~50% higher risk. Meta-analysis: GI RR 1.19 (1.14-1.24); GL 1.13 (1.08-1.17).
Absolute risks: 15,027 cases in 3,800,618 person-years
Authors' conclusion: Higher dietary GI and GL are associated with increased T2D risk.

Modest RRs.

Supports C-WHT-05; undermines consistency of C-GRN-05, C-GRN-07, C-FRU-03.

I-WHT-01 (low certainty GI/GL).

Moderate.

Good evidence for modest association.

Multidimensional assessment
Multidimensional assessment
Authenticity of the source	verified
Methodological quality	high
Risk of bias	some concerns
Precision of results	high
Directness	indirect
Reproducibility	replicated
Consistency with the overall evidence	consistent
Regional transferability	moderate
Adequacy of the interpretation (by the archive)	essentially correct but incomplete

Note: according to the archive, the studies were compiled by the archive operators. Whether Dr. Elawady himself cited this study is not established.

What the archive says about the study: 204,000 people: diet high in GI/GL and low in cereal fibre raised T2D risk by about 50%.
A. What was actually studied?: GI/GL and T2D.
B. What did the authors find?: As results.
C. What conclusions do the authors themselves draw?: GI/GL associated with T2D.
D. What does the archive derive from it?: Used to indict refined flour.
E. Is this derivation scientifically justified?: Numbers correct; the GI/GL argument applies equally to white rice, potatoes, sugar and juices, which the system allows.
Adequacy of the interpretation (by the archive): essentially correct but incomplete