OneStepBeyond said:
There can be other chemicals in your bodily fluids that will glow under a blacklight. Phosphorus is one. There will definitely be phosphorus in your urine and it will glow noticeably, with or without harmine.
Can you give me a reference for this? I have played extensively with blacklights and harmala alkaloids. Without harmala alkaloids, there is very little fluorescence going on around my body. I haven't specifically tested my urine with and without harmalas, but I might soonish if you can provide me with a convincing argument.
Perhaps you are confusing these:
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"phosphorus", the pure element. Its white allotrope slowly oxidizes in atmospheric air, producing a chemilucent glow that originally gave rise to its name, "phosphorus" in greek "Φωσφόρος" meaning "light-bearer". Elemental phosphorus is highly toxic and under normal circumstances does not occur in the body or urine.
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"phosphate", a compound of phosporus (the oxyacid anion). This compound of phosphorus is present in many organisms, including the human body and in human urine.
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"phosphorescence", the phenomenon of delayed light emission after stimulation by light. Although related to fluorescence, it is mechanistically different from it.
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"phosphor", a term to indicate a substance that exhibits the phenomenon of luminescence. The fluorescent coating of fluorescent lamps is called a "phosphor", but I believe it doesn't actually involve any compounds of the element phosphorus, nor do these compounds (strongly) phosphoresce.
None of these equate to
"fluorescence".