Evaluation of the "Eat Less Meat" One-month Challenge

Meat daily intake (in grams) will be calculated by summing daily intake for all the items of the food frequency questionnaire that fall into the meat category.

Meat daily intake (in grams) will be calculated by summing daily intake for all the items of the food frequency questionnaire that fall into the meat category.

Adherence to the French dietary guidelines will be evaluated using the simplified PNNS-GS2. The sPNNS-GS2 builds on the distinction between malus components (less healthy food groups which consumption should be limited, carrying a negative score, i.e., red meat, processed meat, sugary foods, sweet-tasting beverages, alcoholic beverages, salt) and bonus components (healthier food groups carrying a positive score, i.e., fruits and vegetables, nuts, legumes, whole-grain food, milk and dairy products, fish and seafood) reflecting established knowledge on the relationship between food groups consumption and non-communicable disease risk factors. sPNNS-GS2 will computed for each participant (range: -17 to 11.5, with higher scores indicating better adherence to the French dietary guidelines).

Adherence to the French dietary guidelines will be evaluated using the simplified PNNS-GS2. The sPNNS-GS2 builds on the distinction between malus components (less healthy food groups which consumption should be limited, carrying a negative score, i.e., red meat, processed meat, sugary foods, sweet-tasting beverages, alcoholic beverages, salt) and bonus components (healthier food groups carrying a positive score, i.e., fruits and vegetables, nuts, legumes, whole-grain food, milk and dairy products, fish and seafood) reflecting established knowledge on the relationship between food groups consumption and non-communicable disease risk factors. sPNNS-GS2 will computed for each participant (range: -17 to 11.5, with higher scores indicating better adherence to the French dietary guidelines).

Greenhouse gas emissions (GHGEs) will be calculated by multiplying the daily intake of each food item by its associated GHGEs per kg

Greenhouse gas emissions (GHGEs) will be calculated by multiplying the daily intake of each food item by its associated GHGEs per kg

The Self-Report Habit Index will be computed by averaging ratings for all the 12 individual items from the Self-Report Habit questionnaire. Responses will be reported on a 6-point scale anchored by 'strongly disagree' and 'strongly agree' from 1 to 6. The scores will be coded such that high values indicated strong habits.

The Self-Report Habit Index will be computed by averaging ratings for all the 12 individual items from the Self-Report Habit questionnaire. Responses will be reported on a 6-point scale anchored by 'strongly disagree' and 'strongly agree' from 1 to 6. The scores will be coded such that high values indicated strong habits.

The food choice questionnaire (FCQ) includes 30 items and 10 subscales: health, mood, convenience, sensory appeal, natural content, price, weight control, familiarity, ethical concern and animal welfare. Answers to each item will range from 1 to 4: 1 = Not at all important; 2 = A little important; 3 = Moderately important; 4 = Very important. A score for each motive will be computed by averaging ratings for the three individual items in each of the ten subscales, higher scores indicating higher importance.

The food choice questionnaire (FCQ) includes 30 items and 10 subscales: health, mood, convenience, sensory appeal, natural content, price, weight control, familiarity, ethical concern and animal welfare. Answers to each item will range from 1 to 4: 1 = Not at all important; 2 = A little important; 3 = Moderately important; 4 = Very important. A score for each motive will be computed by averaging ratings for the three individual items in each of the ten subscales, higher scores indicating higher importance.