I stayed away from this thread because I thought it was just spam to direct traffic to that HD website. And it probably is. But it's been quite an entertaining read.
I could fast one day a week back when I was in the weight loss mode. I can't do it anymore. The best I can do is consume a buttery coffee and push my breakfast forward to somewhere between 9:30am and 2pm. Or I can go for a strenuous hike without breakfast (but there's always at least some coffee with cream or butter) and have my first meal be lunch.
No floaty, endorphin, spiritual bullshit involved in any of this. Back when I was able to fast one day a week, I ended the day feeling pretty damn hungry and freezing ass cold. Nowadays, pushing breakfast forward, I feel okay but eventually I eat because I am hungry.
I hate all this fasting and floaty spiritual bullshit crap in regards to fasting. It sucks in the mentally weak and it's all bullshit. I lead Sierra Club hikes. They are open to the public. A mentally unstable individual who often shows up who is normally quite strong and tolerable had heard that fasting "cleanses the soul". So he attended my hike carrying a freaking pint of water and two cans of orange soda and an orange (I guess he mistook orange soda for juice or something, he's probably got a sub-80 IQ) and didn't bother to inform anyone until he's practically puking his guts out near the summit. I had to baby-sit his ass all the way up the mountain. All the rest of the hike participants had to give him their extra water. I ended the hike completely out of water having had to give him enough to keep him alive. I had to inform him that when people do a fast they normally sit and meditate, they don't go hiking in 90+ degree temperatures 3000 feet up a mountain and it was foolish of him to do it. His response was, oh wow, I can totally feel the difference, I understand everything about the universe now. Did you know that Russia has robots that look like real people? Oh criminy, jesus h. christ on a raft give me a break.
So your "scientific" jargon is nothing but a bunch of dangerous bullshit that's going to get someone with sub-average intelligence into trouble. My answer to your original question, based on the trend of this conversation:
"Should Women FAST?" No, nobody SHOULD fast.
Female, 5'3", 50, Starting weight: 163lbs. Current weight: 135 (more or less).
I can squat 192.5lbs, press 75lbs and deadlift 210lbs