The Claim

Circadian disruption caused by shift work and poor sleep leads to impairment in metabolic health and liver function.

What the research says

Supports is higher

Support is ahead, but a single strong opposing study can change this.

Supports
52score
Challenges
44score

These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.

Cause and effect
3 studies reviewed
In plain English

Working irregular hours or not sleeping well can mess up your body’s internal clock, which in turn hurts your metabolism and liver — making it harder for your body to process food and stay healthy.

See the scientific wording

Circadian disruption from shift work and poor sleep impairs metabolic health and liver function.

What the research says

3 studies

  1. Study: Shift work and metabolic dysfunction-associated steatotic liver disease: a systematic review of observational studies

    This study found that people who work odd hours (like night shifts) are more likely to have fatty liver disease, which is a sign that their metabolism and liver aren’t working right — so yes, messing up your body’s internal clock seems to hurt your health.

  2. Study: Association between shift work and insulin resistance in women: Implications for metabolic health

    People who work nights or irregular hours had much higher levels of insulin resistance, which is a sign their bodies are struggling to manage blood sugar — a key part of metabolic health. This supports the idea that working odd hours messes up the body’s internal clock and harms metabolism.

Score breakdown, mechanism chain, raw evidence, ideal studies needed & 3 supporting studies

Fit Body Science verdict — we translate health claims into clear verdicts backed by peer-reviewed research.

Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.