Best Supplements for High Blood Pressure

The best supplements for high-blood pressure are listed below:
Many of the supplements and foods listed below were found to reverse atherosclerosis as well.

The ones I tested myself and confirmed a blood pressure lowering effect are:

Niacin (Flush-free, Inositol Hexanicotinate, 250-750 mg / day)
Nitrate-Rich Foods (Beets, celery, etc)
Magnesium (400-800 mg / d)
Taurine (1-3 grams per day)
Potassium (Avocado, Potato, Coconut water, Carrot juice)
Olive Leaf Extract / Oleuropein 500-1,500 mg /d
Garlic / Garlic Extract
Omega 3 (Flaxseed, Sardines, or capsules) 2-5 grams / day
Arginine (3g /d)
Citrulline (3g /d) (Search for Dr. Prendergast)
Pomegranate (One glass of juice per day or extract 1,000 mg)
Tocotrienols 50 mg/d
Hibiscus (1,000 mg /d)
Aronia Berry Extract (500 mg / day)
Eggs (or Choline / lecithin supplements)
Flaxseed Powder (3+ tablespoons / day)
Kefir (one glass / day)
Natto (one 50g pack / day)
Spinach
Astaxanthin
Celery Seed Extract
Chamomile
Folic Acid (800 mcg / day)
Hawthorne
Lavender
Melissa officinalis
NAC (600 – 1,200 mg / day)
Omega 7
Quercetin + Bromelain
Schisandra
Rosemary
Red Wine
Selenium
B-complex vitamins
Chromium Picolinate
Theanine

I also found these but haven’t evaluated their BP lowering abilities:
Peptides
CoQ10
Vitamin D
Grape Seed
Pycnogenol
Melatonin
Alpha Lipoic Acid
Resveratrol
Green Tea Extract (also available decoffeinated)
Cocoa polyphenols
Berberine

An excellent resource on this subject is this journal article:
The role of nutrition and nutraceutical supplements in the treatment of hypertension
https://www.wjgnet.com/1949-8462/full/v6/i2/38.htm