Eating earlier in the day may be one of the simplest tools for weight management

When you eat may matter almost as much as what you eat. A population-based study of over 7,000 Spanish adults published in the International Journal of Behavioral Nutrition and Physical Activity found that a later time of first meal was associated with a higher BMI, while a longer overnight fasting duration was associated with a lower BMI.

These associations held after adjusting for total calorie intake, Mediterranean diet adherence, sleep quality, and physical activity, meaning the timing effect was independent of diet quality and calories. The relationship was particularly strong in premenopausal women, and a five-year longitudinal follow-up confirmed the pattern.

Notably, the benefit of extended overnight fasting was most pronounced for people who had their first meal after 8:30 a.m., suggesting that late-eating patterns carry the most metabolic disruption and have the most to gain from shifting earlier.

Meal timing is an underappreciated lever, and it's free. If you're working on weight management, shifting your first meal earlier and extending the gap between dinner and breakfast are practical starting points worth trying.

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