Research

Adherence

Unintentional weight loss is strongly associated with a cluster of negative health behaviors, including higher smoking rates, increased alcohol consumption, lower physical activity, and lower dietary restraint, compared to intentional weight loss.

If you are losing weight without trying, do not assume it is a sign of health. This type of weight loss is often linked to smoking, drinking, and poor diet. Consult a doctor to rule out underlying conditions and address these behavioral risk factors, as unintentional loss may worsen existing health issues.

ModerateSupportsMEDIUM confidence
Compared to intentional weight losers, those who lost their weight unintentionally reported engaging in more negative health behaviors that are related to disease morbidity and mortality.
Maureen T. McGuire et al. · Obesity Research · 1999

Why this rating

Cross-sectional observational study with self-reported data and a moderate sample size (n=139), limiting causal inference.

Source

The Behavioral Characteristics of Individuals Who Lose Weight Unintentionally

Maureen T. McGuire et al. · Obesity Research · 1999

DOI 10.1002/j.1550-8528.1999.tb00437.x

cross_sectional · n=500Cited 17×
Read the paper
DOI resolved against Crossref · corpus check 2026-06-10

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