Research
Energy balance
For the Zone group, the risk of deficiencies significantly decreased for vitamins A, C, E, and K.
Dietitians may consider the Zone diet as a better option for maintaining vitamin adequacy.
StrongSupportsmedium confidence
In contrast, for the Zone group the risk of deficiencies significantly decreased for vitamins A, C, E and K (p<0.05) with no significant increases in risk of deficiency.
Why this rating
The study involved random assignment and specific measurements of nutrient intake.
Source
Micronutrient quality of weight loss diets that focus on macronutrients: results from the A TO Z study
Christopher D. Gardner et al. · The FASEB Journal · 2008
DOI 10.1096/fasebj.22.1_supplement.1084.7
rct · n=291Cited 16×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
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