Sure but ya this isn’t health advice! I did under supervision (in a sense) by my doctor. He originally wanted me to go on proper meds but I asked for a few months to address it on my own and he was astounded by the results.
Big caveat. I also went from doing 1 or 2 bouts of exercise a week to about 4. Exercise makes a huge difference too.
Ok so here’s what worked for me. I took things twice a day (first thing and with dinner).
Omega 3
Olive leaf extract
Green coffee bean extract
Magnesium
Potassium
Garlic
Hibiscus tea (this was a tea not a pill)
Also vitamin D and C (for immune not BP).
The olive leaf / green coffee bean / hibiscus are all well attested (if memory serves) as vasodilators. I think garlic too. The Magnesium and potassium also have an effect.
The Omegas were more for inflammation.
I also tried Apple cider vinegar but had no bad effect when I dropped it. Also started doing turmeric and boron but not related to blood pressure.
I joke with my doctor that to avoid taking that 1 pill I’m now taking like 20 pills. But much prefer this.
While under this regime I also got into much better shape, mostly through diet (cutting out carbs), so for me the supplements were a short term / med term thing while baseline health improved.
Final note. Genetics play a huge role in blood pressure (and have some family history) and of course your stress levels too.
Edit: just remembered, reducing my caffeine intake was also a big part of the story. 2 cups a day is now my max vs 4+ cups.