LAUSR

Abstract Objective: To examine the labelling status of trans-fat of pre-packaged foods sold in Hong Kong. Design: Data from 19 027 items in the 2019 FoodSwitch Hong Kong database were used. Ingredient lists were screened to identify specific (e.g. partially hydrogenated vegetable oil, PHVO) and non-specific trans-fat ingredient indicators (e.g. hydrogenated oil). Trans-fat content was obtained from the on-pack nutrition labels, which was converted into proportion of total fat (%total fat). Descriptive statistics were calculated for trans-fat content and the number of specific, non-specific and total trans-fat ingredients indicators found on the ingredients lists. Comparisons were made between regions using one-way ANOVA and χ 2 for continuous and categorical variables, respectively. Setting: Cross-sectional audit. Participants: Not applicable. Results: A total of 729 items (3·8 % of all products) reported to contain industrially produced trans-fat, with a median of 0·4 g/100 g or 100 ml (interquartile range (IQR): 0·1–0·6) and 1·2 %totalfat (IQR: 0·6–2·9). ‘Bread and bakery products’ had the highest proportion of items with industrially produced trans-fat (18·9 %). ‘Non-alcoholic beverages’ had the highest proportion of products of ‘false negatives’ labelling (e.g. labelled as 0 trans-fat but contains PHVO; 59·3 %). The majority of products with trans-fat indicator originated from Asia (70 %). Conclusions: According to the labelling ∼4 % of pre-packaged food and beverages sold in Hong Kong in 2019 contained industrially produced trans-fat, and a third of these had trans-fat >2 %total fat. The ambiguous trans-fat labelling in Hong Kong may not effectively assist consumers in identifying products free from industrially produced trans-fat.