I have a diabetic relative who loves his potato salad but really never eats it anymore. I read some tips to lower the glycemic index and perhaps some diabetics can benefit . I know each is affected differently by what one eats and perhaps these tips can help some make dietary choices Cooking potatoes ahead of time and chilling overnight decreases the glycemic index and and slows down the absorbption of sugar and starches. Read more . Boil the potatoes ahead of time and refrigerate overnight. The next day, make the dressing with vinegar and olive oil - not mayo - and mix with the potatoes. Both chilling and using vinegar neutralize starch's blood-sugar effects. One thing to remember again is not to use mayonnaise but oil and vinegar dressing instead for a heart healthy recipe Some studies show that vinegar also reduces the glycemc index Hope these tips help some.