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ASK A VEGAN

Will I lose weight going vegan?

Most people do — the average vegan has a lower BMI than the general population — but a vegan diet is not automatically slimming.

HEALTH

Short answer

Most people do — the average vegan has a lower BMI than the general population — but a vegan diet is not automatically slimming.

HEALTH

The detail

EPIC-Oxford (2003) found vegans averaged 5-7 kg less than meat-eaters. Randomised trials (BROAD, Barnard) confirm significant weight loss on ad-libitum WFPB diets vs. standard advice.

Junk-food vegan diets (vegan pizza, fries, sugar) do not produce these results. Weight loss tracks whole-food, fibre-rich eating, not veganism per se.

To maximize weight loss, focus on 'whole' plants like potatoes and beans rather than highly processed vegan nuggets and sugary plant-based milks. A 2020 study in the journal Nutrients showed that a low-fat vegan diet increased the thermic effect of food, meaning participants burned more calories even while resting. Keeping an eye on portion sizes for calorie-dense items like nuts and oils will help ensure the weight loss is sustainable and health-focused.

Source: Spencer et al., Int J Obes 2003;27(6):728-734.

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