Well, I thought (assumed) that MSG caused raised blood pressure like salt would [salt acts immediately I gather, I thought it was the sodium??], but according to the this HN thread there are no adverse reactions other than extremely rare allergies?

https://pubmed.ncbi.nlm.nih.gov/21372742/ (first paper SERPs returned for me) suggests that MSG increases BP over the order of years. Not sure the "it's entirely healthy" claims pan out?