I’ll add- while it’s a research based book, she’s a biochemist, and she cites everything, it’s firmly in the “emerging science” category, NOT the scientific consensus category. If we think nutrition is a young field, fertility treatment is… oof. (Half of medicine seems barely out of the “blame her mean thoughts for her barren womb stage” LOL). Anyway, point being, this is one area you need to consider your own baseline for sure. Do you want to need to optimize? The majority of heterosexual couples will conceive within 6 months of trying without taking any of these steps, although some of the most basic (iron, folate) are very clearly a good idea for most people.
I will say, everything I’ve done re: fertility has at least some data. The question is abundance and quality. You can find a study for just about anything
To your specific questions: yes, whole fat dairy has a correlation with shorter time to conception than low fat. It is not a perfectly designed study from what I remember when I read it, but was compelling enough that I buy into it- it helps though that I only tolerate full fat dairy, and skim is too inflammatory for me- and again back to my baseline starting worldview on nutrition. That being said, dairy intolerance is more common than people realize and if you’re sensitive to it, it’ll be more damaging to include it in general. (Particularly unfermented dairy, ie, liquid milk)
Re the antacids, I’m assuming you mean PPIs and infertility? I think I’ve seen stuff on that. I don’t know quality of evidence there. We know there are some long term health concerns with ongoing PPI use in general, but more importantly is a ton of PPIs have been under recall because of the USs’ medication contamination issues. (Saying goodbye to ranitidine during my pregnancy legitimately made me cry). MDMA can be carcinogenic, and until we know what it does to a gestating fetus (which we can’t test) it’s recommended to avoid those meds with high contamination levels if you’re gestating or may become gestating. PPIs also reduce absorption of B12, so if you’re vegan, veg, had a gastric sleeve or bypass, or low intrinsic factor, or for some other reason know you’re prone to deficiency in B12, I would proceed with caution on PPIs (although, again, the big concern here is chronic use- the way our stomach acid production has a feedback loop, we become physiologically dependent on PPIs with regular use, and that’s when the problems seem to arise).
Ubiquinol studies are covered in the Fett book. Yes there’s some evidence. Yes it’s very commonly used in fertility clinics for egg quality concerns and recurrent miscarriage. With how expensive it is, I’m not sure I would take it before knowing I had a need if I was young and otherwise healthy. Ideally you could find a trusted healthcare provider to discuss the decisions with, but IME this falls well into the “naturopath or reproductive endocrinology, no in between” category. Again- emerging science, not yet consensus. A good option when you don’t have other options, but not really a necessary starting point.
Infertility affects 1 in 8 couples, yes. But that also means 7 of 8 opposite sex couples conceive within a year with no interventions. That being said, clinical picture always matters- egg quality concerns and PCOS and so on all have their own profile for considerations.