Fat busting the light way

The US study found that the timing, intensity and duration of light exposure during the day were linked to weight.

Participants who experienced most of their daily exposure to even moderately bright light – measured by a wrist actigraph – in the morning had significantly lower BMIs than those who got most of their light exposure later in the day.

The influence of morning light exposure on body weight was independent of physical activity levels, caloric intake, sleep timing, age

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