Drinking beetroot juice once doesn't fully fix the blood vessel function in people with Alzheimer's, even though it works better in healthy older adults or young people.

Drinking beetroot juice might temporarily make blood vessels in the legs respond better to movement, and this seems to happen in older people with Alzheimer’s, healthy older adults, and even young people.

Drinking beetroot juice may raise certain chemicals in the blood that help your body make nitric oxide, which is good for blood flow — and this seems to happen whether you're young, older, or have Alzheimer's.

Drinking beetroot juice once can temporarily make blood flow better in the arms of older people with high blood pressure, but if they drink it every day, that boost goes away after a while.

Drinking beetroot juice every day for a month, with about 800 mg of natural nitrates, doesn’t seem to make blood vessels in the arms work better or worse in older people who are already taking medicine for high blood pressure.

If older adults with high blood pressure drink beetroot juice every day for a month, their body shows more of certain chemicals in their blood and saliva that help relax blood vessels — which means their body is using a natural pathway to make nitric oxide.