that is just plain silly
sometimes I think certain things get said and then repeated and then they just are accepted as fact without anybody actually doing any research or investigation
Your statement is just plain silly
Here is one study which shows that acetic acid lowers blood pressure and has no negative effects on all. I'm sure there's many others if you wanted to look
Antihypertensive Effects of Acetic Acid and Vinegar on Spontaneously Hypertensive Rats
Shino KONDO1), Kenji TAYAMA1), Yoshinori TSUKAMOTO1), Katsumi IKEDA2) and Yukio YAMORI2)
1) Central Research Institute, Mitsukan Group Corporation
2) Graduate School of Human and Environmental Studies, Kyoto University
To clarify the possibility of a preventive effect of dietary vinegar on blood pressure, long-term administration of vinegar or the acetic acid to SHR was examined. As a result, it was observed that acetic acid itself, the main component of vinegar, significantly reduced both blood pressure (p<0.05) and renin activity (p<0.01) compared to controls given no acetic acid or vinegar, as well as vinegar. There were no significant differences in angiotensin I-converting enzyme activity in various organs. As for the mechanism of this function, it was suggested that this reduction in blood pressure may be caused by the significant reduction in renin activity and the subsequent decrease in angiotensin II. From this study, it was also suggested that the antihypertensive effect of vinegar is mainly due to the acetic acid in it.