Beetroot juice (dietary nitrate)
Dietary nitrate from concentrated beetroot juice produces a modest, fast-onset reduction in resting systolic BP. Effect plateaus around day 14.
Bahadoran et al. 2017 meta-analysis (43 RCTs) found dietary nitrate supplementation reduced systolic BP by a pooled -4.8 mmHg, with effect plateauing within 14 days of consistent intake.
Beetroot juice contains dietary nitrate that converts to nitric oxide via the entero-salivary pathway. Nitric oxide is one of the body's primary vasodilators. More nitric oxide → wider blood vessels → lower resting BP.
The mechanism is unusually clean for a dietary intervention. The size of the effect is modest but real.
When you'll see it work
Fast. Most trials report measurable BP changes within 7-14 days. The effect plateaus quickly — taking double the nitrate dose doesn't double the BP effect.
How it sits in the stack
Beetroot is a Week 1 lever specifically because its onset is fast enough to give you an early "the protocol is doing something" signal. That signal helps adherence on the slower-acting levers (resistance training, supplementation).
Practical notes
The intervention is concentrated beetroot juice — "shot" formats are common. Eating whole beets works but you'd need a lot of them to hit the trial doses.
Side effect: beeturia (red/pink urine). This is harmless and a useful reminder you took the dose.
What the app does
The app tracks adherence and weighs the lever's BP contribution against your other Week 1 levers. By day 14, the correlation engine has enough signal to tell you whether beetroot is doing meaningful work for your readings or whether it's masked by the other interventions running in parallel.