Here are 12 nutritional and herbal supplements that may offer benefits to people with high blood pressure.
There is evidence that CoQ10 may positively influence blood pressure.
Side effects of CoQ10 tend to be mild and may include stomach upset and insomnia.

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CoQ 10 can interact with blood thinners likewarfarin, as well asinsulinused to treat diabetes.
Garlic
Some studies suggest thatgarlic has potent blood pressure-lowering effects.
Green tea can be consumed as a tea or taken as a supplement.
L-Arginine
L-arginineis an amino acid that the body uses to make nitric oxide.
Nitric oxide, in turn, is a vasodilator that causes blood vessels to widen (dilate).
When blood vessels are dilated, blood pressure goes down.
It may also trigger an asthma attack in people with asthma.
Good sources of dietary magnesium include:
Overuse of magnesium supplements can lead to diarrhea.
Potassium
Potassiumis one of the better examples of a natural supplement that may help lower blood pressure.
Supplements to Avoid
There are also some that can raise blood pressure.
Whelton PK, Carey RM, Aronow WS, et al.
2018;71:e13e115.
2019 May 18;11(5):1112. doi:10.3390/nu11051112
National Institutes of Health.Calcium.
National Center for Complementary and Integrative Health.Coenzyme Q10.
2020 Jul 15;9(7):619. doi:10.3390/antiox9070619
National Center for Complementary and Integrative Health.Garlic.
National Center for Complementary and Integrative Health.Ginger.
Hasani H, Arab A, Hadi A, et al.Does ginger supplementation lower blood pressure?
99(6):e19047.
doi:10.1097/MD.0000000000019047
McRae MP.Therapeutic benefits of L-arginine: an umbrella review of meta-analyses.J Chiropr Med.
2016;15(3):184-189. doi:10.1016/j.jcm.2016.06.002
MedlinePlus.L-arginine.
2016;68(2):324-333. doi:10.1161/HYPERTENSIONAHA.116.07664
MedlinePlus.Magnesium in diet.
doi:10.7759/cureus.1038
Office of Dietary Supplements.Vitamin D fact sheet for health professionals.