Why is that an issue? Oral minoxidil is very effective, and Dr. Bisanga himself switched from finasteride to oral minoxidil, he said he saw no difference. As for no scientific studies, that’s not true at all.
Here’s a study Dr. Vaño did in 2021. I will be speaking to him this year in a podcast. Now whether it’s equal to finasteride is debatable. I think ultimately, using both is the best. But obviously, that is a patient’s personal choice. Minoxidil has been around longer than finasteride, but suddenly the internet claims there’s no long term studies or safety.
https://pubmed.ncbi.nlm.nih.gov/33639244/