A normal range for blood urea nitrogen is generally 8 to 24 mg/dL for adult men (2.86 to 8.57 mmol/L) and 6 to 21 mg/dL (2.14 to 7.50 mmol/L) for adult women. However, urea nitrogen levels vary by age. Infants have lower levels than other people do.
Fortunately, freezing zucchini and other summer squash is a snap: All you do is cut it into half-inch slices, blanch it in a pot of boiling water for three minutes, transfer it to a bowl of ice water to cool, drain it, and bag it.
The best way to use over grown (10 to 12 inches) zucchini is to grate it and use in zucchini bread. Cut the squash in half lengthwise and cut away the seedy middle section. Wash, grate and freeze in one cup portions. Use zip closure freezer bags or rigid freezer containers leaving 1/2 inch head space.