The Claim

Improving diet quality alone, as measured by the 10-item Diet Quality Score, does not result in a clinically meaningful 10% reduction in all-cause mortality risk in isolation, but significantly contributes to such a reduction when combined with improved sleep and physical activity.

Source: Minimum and optimal combined variations in sleep, physical activity, and nutrition in relation to all-cause mortality risk

What the research says

Supports is higher

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

Supports
66score
Challenges
0score

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
1 study reviewed
In plain English

Eating better by itself won’t cut your risk of dying from any cause by 10%, but if you also sleep better and move more, then eating well helps make a real difference.

See the scientific wording

Improving diet quality alone, as measured by the 10-item Diet Quality Score, does not reach a clinically meaningful 10% reduction in all-cause mortality risk in isolation, but contributes significantly when combined with better sleep and physical activity.

What the research says

1 study

  1. Study: Minimum and optimal combined variations in sleep, physical activity, and nutrition in relation to all-cause mortality risk

    The study found that making small improvements in diet, sleep, and exercise together lowers death risk by 10%, but no single change alone was shown to do the same — which is exactly what the claim says.

Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 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.