Mice that ate lard had more muscle relative to their total weight than mice eating camellia seed oil, even though they weighed the same or more.

Scientific Claim

In mice fed a 25% fat diet, lard consumption was associated with greater lean body mass percentage compared to camellia seed oil, despite similar or higher total body weight, suggesting differential effects on body composition.

Original Statement

“The lean body mass/body weight (%) in the Lar group was significantly greater than in Cam groups (Fig. 1C) (P < 0.05).”

From study:A moderate lard-included diet reduces fat deposition and inflammation in the adipose tissue

Evidence Quality Assessment

Claim Status

appropriately stated

Study Design Support

Design supports claim

Appropriate Language Strength

definitive

Can make definitive causal claims

Assessment Explanation

Lean body mass percentage was directly measured and statistically compared between groups. The claim accurately reflects the observed difference without inferring causation or human relevance.

Evidence from Studies

Supporting (1)

A moderate lard-included diet reduces fat deposition and inflammation in the adipose tissue

Cohort Study

Animal

2025 Dec 12

This study found that mice eating lard (pig fat) ended up with less body fat than those eating plant oils, even when they weighed the same—meaning they had more muscle and less fat, which matches the claim.

Contradicting (0)

No contradicting evidence found

Source Study

A moderate lard-included diet reduces fat deposition and inflammation in the adipose tissue

Score: 6

DOI: 10.1038/s41538-025-00657-8

Similar Assertions

When mice ate a moderate amount of lard (pig fat), they stored less fat in their fat tissue than mice that ate the same amount of plant-based oils.

86%

Mice that ate lard had less oxidative stress (less cell damage from free radicals) and more natural antioxidants in their fat tissue than mice eating plant oils.

83%

When mice ate a diet with a moderate amount of lard (pig fat), they stored less fat in their fat cells and had smaller fat cells than mice eating plant oils, even when both diets had the same number of calories.

81%

Mice that ate lard had their bodies activate more genes and proteins that break down fat and turn off genes that make new fat, compared to mice eating plant oils.

74%