There is no such thing as some fruits, like orange and lemon are acidic, because all fruits become alkaline in our body, according to Dr. Herbert Shelton who did research on this matter. If you have mastered the correct way of eating fruits, you have the Secret of beauty, longevity, health, energy, happiness and normal weight.
Except for the occasional leaf, stem, seed, flower, or root we eat, all our plant meals are fruit. Fruit being the seed-bearing part of the plant. Squash is just as much a fruit as a cherry and no one I know is likely to be eating raw squash on an empty stomach.