From late 14c. as fence of pointed stakes; figurative sense of limit, boundary, restriction is from c.1400. Barely surviving in beyond the pale and similar phrases. Meaning the part of Ireland under English rule is from 1540s, via sense of territory held by power of a nation or people (mid-15c.). pale
A ketone test checks for ketones in your blood or urine. Ketones are substances that are made when the body breaks down fat for energy. Normally, your body gets the energy it needs from carbohydrate in your diet.
However, urine tests detect a different chemical called THC-COOH. THC-COOH is a metabolite of THC. It is produced when the liver breaks down THC and stays in the body for much longer. The most common cutoff level for THC-COOH used by drug screening companies is 50 ng/mL.Less common cutoff levels are 20 ng/mL and 100 ng/mL.owever, urine tests detect a different chemical called THC-COOH. THC-COOH is a metabolite of THC. It is produced when the liver breaks down THC and stays in the body for much longer. The most common cutoff level for THC-COOH used by drug screening companies is 50 ng/mL.