Holly Holm has certainly took PEDs. Like most other top level athletes. She has got a pass it seems due to people liking her, she dethroned Ronda (whom a lot of people hate), she seems like a nice girl and she's a White American.
Many female fighters who get accused of steroids have lesser bodies than Holly and are also more Feminine looking facially.
This physique right here is not attainable for a Woman naturally nor for most Men.
I'll repost the photo another user posted in this thread. A younger Holly as a professional boxer after a 'life time of exercise'. Here, she is most likely natural. Her arms, her face..it's all softer, slimmer and more feminine.
For Women it is doubly hard to get low body fat and large muscles. When a Woman is sporting a body that puts many athletic Men to shame, you know something is amiss.
The whole 'oh, she/he has been working out all their life, you're just a fat lazy loser who has never exercised' excuse is pathetic. People who say this shit are the ones outing themselves for their ignorance on the limitations of the human body. Keep burying your heads in the sand bozos.
For example, here is Conor McGregor an athletically gifted male who has been working out for much of his life. Their are countless other top level athletic Men with lesser physiques than Holly Holm.