Back in the 1980s I served as a scientific advisor to the firm (Berkley Wellness Network) that first brought the Tibetan vasocative product PADMA28 into the USA (BHN was bought by businessman Curtis Jaquot in the early 1990s and became “Pacific BioLogic, Inc.) In the mid-1990s I fed PADMA28 laced chow to guinea pigs with induced arterial blockage. Animals fed high doses showed a reversal of blockage.
Note: I have no financial or other commercial interest in PADMA or any firm that makes, sells, markets, distributes or otherwise promotes it.
My 2007 article on PADMA 28: https://biotheorist.files.wordpress.com/2018/07/padma-28-2017.pdf
PubMed search results: http://www.ncbi.nlm.nih.gov/pubmed/?term=PADMA+28