Add fresh grapefruit juice to mixing glass, pour in soda water / club soda, 2 - 4 teaspoons of chilled syrup, lemon juice and pinch of salt. (aliceineatland.com)
If you don't have time to eat a whole grapefruit, you can always make fresh grapefruit juice and take it on - the - go! (bembu.com)
I will dilute with fresh grapefruit juice or lime juice for a different spin on a creamy dressing. (fedandfit.com)