After swimming, rats that drank whey protein had more leucine in their blood than those drinking other proteins at 1 and 1.5 hours after eating.

Scientific Claim

In male Sprague-Dawley rats subjected to two hours of swimming exercise, whey protein concentrate ingestion was associated with significantly higher plasma leucine levels than caseinate, milk protein concentrate, and soy protein concentrate at 60 and 90 minutes post-ingestion.

Original Statement

“WP produced significantly higher plasma Leu levels than all the other proteins at 60 and 90 min, and compared to MP and SP at 30 and 120 min.”

From study:Effects of Whey, Caseinate, or Milk Protein Ingestion on Muscle Protein Synthesis after Exercise

Evidence Quality Assessment

Claim Status

appropriately stated

Study Design Support

Design supports claim

Appropriate Language Strength

definitive

Can make definitive causal claims

Assessment Explanation

The claim describes observed differences in plasma leucine levels without implying causation, which aligns with the study's design as a descriptive animal experiment.

Evidence from Studies

Supporting (1)

Effects of Whey, Caseinate, or Milk Protein Ingestion on Muscle Protein Synthesis after Exercise

Cohort Study

Animal

2016 Jun 3

Contradicting (0)

No contradicting evidence found

Source Study

Effects of Whey, Caseinate, or Milk Protein Ingestion on Muscle Protein Synthesis after Exercise

Score: 15

DOI: 10.3390/nu8060339

Similar Assertions

After swimming, rats that drank whey protein had more leucine inside their muscles than those drinking other proteins for up to 1.5 hours after eating.

95%

When rats swam for two hours and consumed dairy proteins (whey, milk, or caseinate), their muscle building rates were higher than those eating soy protein at specific times after eating.

86%

When rats swam for two hours and then consumed whey protein, their muscle building rate peaked at 60 minutes with a value of 7.76% per day.

84%

When rats ate a larger dose of regular whey protein, their blood had more leucine than when they ate the same amount of hydrolyzed whey protein an hour later.

82%

When rats ate more milk protein up to a certain amount, their muscle building increased, but eating even more didn't help further.

78%