I wonder how breast milk compares?
Semen's nutritional value:
Ejaculate contains aboutonia, ascorbic acid, blood-group antigens, calcium, chlorine, cholesterol, choline, citric acid, creatine, deoxyribonucleic acid (DNA), fructose, glutathione, hyaluronidase, inositol, lactic acid, magnesium, nitrogen, phosphorous, potassium, purine, pyrimidine, pyruvic acid, sodium, sorbitol, spermidine, spermine, urea, uric acid, vitamin B12, and zinc.
http://www.sextest.us/nutrition.JPG
Can swallowing semen enrich a poor diet? Unless you're gulping gallons of it each day, it's no substitute for real nutritious cuisine.
It is anti depressant and contains epinephrine.
WikiAnswers - What is the nutritional content of human semen