The Claim
Daily consumption of 845 mg of dietary nitrate from spinach for 7 days results in no significant change in arterial stiffness as measured by augmentation index between day 1 and day 7 in healthy young adults.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
Eating 845 mg of dietary nitrate from spinach every day for 7 days does not reduce arterial stiffness more on day 7 than on day 1 in healthy young adults.
See the scientific wording
Daily consumption of 845 mg of dietary nitrate from spinach for 7 days does not lead to tolerance in arterial stiffness reduction, as the effect size on augmentation index remains similar between day 1 and day 7, suggesting sustained vascular responsiveness to nitrate in healthy young adults.
Eating nitrate-rich spinach turns nitrate into nitrite in the mouth, then into nitric oxide in the blood, which tells blood vessels to relax. This relaxation lowers arterial stiffness and blood pressure, and the same process works just as well on the seventh day as on the first.
What the research says
1 studyEating spinach with lots of nitrate every day for a week kept making arteries more relaxed, just like on the first day — no loss of benefit over time.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.