For people with controlled high blood pressure, eating a meal with lots of potassium doesn't change how well their blood vessels relax at the start of the meal compared to a meal with less potassium.

Scientific Claim

In 33 treated hypertensive patients, a single high-potassium meal (2278 mg) resulted in no significant difference in radial artery flow-mediated dilation (FMD) compared to a low-potassium meal (530 mg) at baseline (4.2% vs 2.6%, p=0.93).

Original Statement

“baseline: high K+ 4.2 ± 2% versus Low K+ 2.6 ± 3%, p = 0.93”

From study:Postprandial Vascular Effects of a High Potassium Meal in Patients with Treated Hypertension

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 RCT design allows for direct comparison between meals, and the claim accurately states the non-significant result without implying causation.

Evidence from Studies

Supporting (1)

Postprandial Vascular Effects of a High Potassium Meal in Patients with Treated Hypertension

Randomized Controlled Trial

Human

2024 Dec 27

Contradicting (0)

No contradicting evidence found

Source Study

Postprandial Vascular Effects of a High Potassium Meal in Patients with Treated Hypertension

Score: 51

DOI: 10.3390/nu17010045

Similar Assertions

After eating a high-potassium meal, people with controlled high blood pressure may have slightly better blood vessel relaxation two hours later, but this difference isn't strong enough to be considered statistically significant.

92%

Eating meals with different potassium levels doesn't change the size of the radial artery or how much blood flow increases after a temporary blockage in people with controlled high blood pressure.

78%

When people with controlled high blood pressure eat a meal high in potassium, their blood potassium levels go up significantly compared to a low-potassium meal, especially within an hour and two hours after eating.

73%