There is indeed a relationship between the consumption of asparagus and the distinctive, even unpleasant, smell of urine. In fact, this is due to the presence of sulfur compounds that result from the degradation of certain substances (including asparagine) contained in this type of vegetable.
On the other hand, asparagus is mainly available in 3 colors: white (completely grown under the ground and away from sunlight, which explains its color), violet (whose tip springs out of the ground for a few centimeters and this explains its coloring), and green (the best known and which grows entirely out of the ground and whose complete exposure to sunlight explains its color).
Asparagus, and whatever its color, is one of the least caloric vegetables (about 20 Kcal/100g). It is rich in soft fibers that are well tolerated by the intestines and help in regulating and stimulating intestinal transit.
Asparagus is rich in vitamin B9 mainly, as well as in vitamins C and A. Its vitamin content tends to decrease during its storage and cooking. Asparagus is also rich in potassium, phosphorus and calcium.
Caution! The high content of uric and oxalic acids in asparagus makes it a food that people who suffer from kidney problems or stones, or from cystitis, or from gout, should consult their doctor before consuming it.