What are some intermittent fasting tips for women above 40?

I've been exploring intermittent fasting as a lifestyle change, specifically the 16/8 method, where you fast for 16 hours and eat during an 8-hour window. As a woman in my 40s, I'm particularly interested in understanding how to make this approach work best for me. 

I’ve heard from friends and read online that women over 40 might face unique challenges with intermittent fasting due to hormonal changes and metabolic shifts that come with age. For example, one friend of mine mentioned she experienced increased fatigue and headaches when she started fasting, and another struggled with maintaining energy levels for her evening workouts.

Given these potential issues, I'm curious:

1. What specific tips and strategies can help women over 40 successfully implement intermittent fasting without negatively impacting their energy levels or overall health?
2. Are there particular foods or meal timings that are more beneficial for women in this age group?
3. How can one manage and mitigate side effects such as fatigue, headaches, or irritability during the initial adjustment period?
4. Have there been any studies or expert recommendations on how intermittent fasting impacts women differently at this stage of life?
5. Are there any health concerns or contraindications that women over 40 should be aware of before starting intermittent fasting?

I hope to get different answers from everyone.