Impact of sustainable diets on micronutrient intakes and status: outcomes of the MyPlanetDiet randomized controlled trial
Abstract
BACKGROUND
Data from dietary intervention studies to test the ability of sustainable diets to meet micronutrient (MN) requirements is required.
OBJECTIVE
To compare MN intakes and status among adults who received dietary counselling to follow a sustainable diet or a standard healthy diet.
METHODS
We conducted a single-blind, randomized controlled trial among 355 healthy adults aged 18-64 years in three centers over 12-weeks. Participants received personalized dietary counselling; the intervention arm for a sustainable healthy diet and the control arm for a healthy diet. Greenhouse gas emissions (GHGE), MNs and biomarkers of nutritional status were assessed, and the prevalence of inadequate intakes was defined by the proportion of participants with usual intakes below harmonized Average Requirements. Data were analyzed using two-way mixed ANCOVA (time and treatment) on complete-cases.
RESULTS
There were differential changes in intakes in the intervention arm compared to controls for GHGE (-22%), energy (-8%), retinol (-25%), thiamin (-11%), riboflavin (-16%), niacin (-16%), calcium (-16%), zinc (-13%), potassium (-10%), selenium (-15%), and iodine (-26%), vitamins B6 (-12%), B12 (-36%), C (-23%), D (-28%) and K1 (30%) (Pinteraction < 0.05). These were consistent following energy adjustment for retinol, riboflavin, niacin, calcium, iodine and vitamins B12 and K1. The prevalence of inadequate intakes of riboflavin, vitamins B6 and B12, calcium and zinc increased considerably,…
How strong is the evidence?
Evidence Hub reads this as a randomized trial, done in people. Its evidence level is 2 of 5 (High · randomized trial). Randomized trials of a reasonable size are the strongest single-study design. Reported size: 355 participants or records.
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