Grapefruit juice is a useful source of vitamin C and antioxidants, both of which are beneficial to the immune system.

Grapefruit juice contains immune-boosting vitamin C and antioxidants. How grapefruit juice boosts immunity:

Vitamin C: Like lemons, grapefruits are high in vitamin C, an antioxidant that boosts immunity. Vitamin C boosts white blood cell synthesis and activity, which fights infections. 

Antioxidants: Flavonoids, carotenoids, and vitamin C in grapefruits neutralize free radicals and minimize oxidative stress. 

Maintaining a healthy immune system requires staying hydrated to support immune cell function and toxin removal. Grapefruit juice can help hydrate, especially when part of a balanced diet with enough of fluids.

Anti-inflammatory Properties: Grapefruit flavonoids and polyphenols reduce inflammation. 

Despite tasting acidic, grapefruits alkalize the body when consumed. For optimal immune function, a slightly alkaline pH balance reduces the growth of dangerous bacteria and viruses.

Grapefruit and grapefruit juice can interact with several medications, so if you take any prescriptions, ask your doctor before eating grapefruit. 

Commercial grapefruit juice products may contain additional sugars, which can lower immune function.

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