After having Covid I noticed a hard spot in a varicose vein in my thigh that was previously not there. I’m not saying the Covid did this but I’m also not saying it didn’t. Bottom line approximately 3 weeks after taking 2 nattokinase pills a day on an empty stomach morning and night the hard spot which I can only assume was a clot is no longer there. Will continue taking nattokinase indefinitely. I also believe it would help with my heart health while under Testosterone replacement therapy.