I never use the unit "serving" when creating a manually entered food. Instead, when writing the description, I'll indicate the suggested serving size right in the description, i.e.
"Brand A 5 Grain Cereal (serving=35 grams)"
"Brand X Red Pepper Pasta sauce (serving=1/2c)"
And then I'll input the nutritional information based on "grams" or "cups"...
Most of the time i prefer "weight" measures (grams or ounces), as it makes it very easy later to just put whatever i'm eating on the scale, oh, 26 grams! 4.3 ounces! easy easy easy to measure and input, no last-minute math required. Whereas if you put the measurement in by serving, it's a) easy to forget what the "serving size" was supposed to be and b) more complicated to calculate when eating partial servings.
Goal 1 - break 200 (46 pounds lost)**DONE**
Goal 2 - leave obesity behind (BMI 29.9, at 185#) **DONE**
Goal 3 - BMI = Normal (154# or less)
| current weight: 172.5