Hi!
This is only a guess... but I think I managed to keep the hotflashes to a minimum (and then very bearable) by restricting / avoiding milk products and all kinds of meat (since I´m vegetarian). The reason being: most milk producing animals are fed with alot of hormones. Also animals eaten for their meat like chicken, pork, beef etc are laden with hormones. IMHO its these hormones that give us women all the extremely bad "symptoms" of hot flashes. Menopause being a natural phase in our lives, should´nt normally be as unbearable as it is for some ladies.
Nowadays when I indulge in too much cheese I get hot flashes... so this is how I can tell and feel theres a connection there.
I´ve also noticed the hotflashes occur where our chakras are located - so I´ve told myself the universe is making me more aware of my chakras and all the energy that´s at my disposal!!! Makes me appreciate my female energy!
Best wishes to you.

I feel for you!! Been there... and am still there 4 years later! Although each of us is different, what works for me is to stay away from processed food... especially anything that is carbohydrates. So... I do not eat bread, pasta, anything with sugar, or that can change into Sugar in my system. I eat lots of vegetables and lean meat ( mostly chicken and fish with my red meat being venison that we process ourselves). My hot flashes have diminished by 80%. I tried bioidentical hormones... they did nothing. Ashwagandha actually helped me a great deal. Finding out what works for you might take some time. While you are seeking, just carry a foldable fan in your bag... it does help to have that breeze available when you need it!!