I agree with you @kenhudoy, however there is one thing to take into consideration. There are a lot people taking a lot of drugs (medication) and these are toxins which the plant will absorb and we end up eating them. So urine is a good option from people who live a healthy lifestyle as our forefathers did. Our food was not so riddled with artificial colourants, preservative and chemicals, nor did they consume the amounts of medication as we do today.