Grapefruit juice (1 piece)

Choose whole grapefruit instead of grapefruit juice when possible; the intact fruit contains more fiber and is typically less likely to raise glucose quickly.

Reduce the juice portion and dilute it with still or sparkling water; drink it slowly rather than all at once.

Have the juice with a protein- and fat-containing food such as plain unsweetened Greek yogurt, eggs, or a small handful of nuts.

Add fiber alongside it, such as chia seeds stirred into yogurt or oatmeal made from steel-cut or rolled oats.

Avoid drinking grapefruit juice on an empty stomach; include it as part of a balanced meal rather than as a standalone drink.

Take a short, easy walk after consuming it, if this is safe and appropriate for you.