Finally found what I was looking for. Apparently, depending on substrate, it may not even be present at all in reishi, which is not surprising since it is a mushroom and mushroom metabolites tend to vary greatly based on what the mushroom was growing on.
I haven't found out about what the amount is for sure when grown on Duane Wood logs as the substrate, the data I've found is for brown rice substrate, but it's definitely well below the concentration in tonka beans and also well below the concentrations of the mycotoxic compounds:
http://www.mdpi.com/1420-3049/18/6/6663/pdf
I can't imagine with a number that low on that substrate that it gets anywhere near as good as the tonka bean, even if it manages to surpass the toxic compounds, it won't ever be cost effective. Whilst it costs half as much per poundage, it'd take several times as much product to achieve the desired effect. Not effective. At least, not for coumarin. I'm actually finding myself doubting its potential effectiveness for any kind of hormonal changes, it's been cited as having an effect on DHT levels, but, like saw palmetto, I'm just not seeing how based on what compounds it has.
EDIT: Oh fuck me. Apparently, I made the mistake of not verifying the extraction method used for the liquid extract they then tested. It was water extraction. Naturally. And, of course, that's going to skew the coumarin content DOWNWARDS. Since, like most hormone altering compounds, coumarin is lipophilic, or, lipid soluble. It'll dissolve and preserve best in lipids, slightly less in alcohol, and horridly in water.
I haven't found out about what the amount is for sure when grown on Duane Wood logs as the substrate, the data I've found is for brown rice substrate, but it's definitely well below the concentration in tonka beans and also well below the concentrations of the mycotoxic compounds:
http://www.mdpi.com/1420-3049/18/6/6663/pdf
I can't imagine with a number that low on that substrate that it gets anywhere near as good as the tonka bean, even if it manages to surpass the toxic compounds, it won't ever be cost effective. Whilst it costs half as much per poundage, it'd take several times as much product to achieve the desired effect. Not effective. At least, not for coumarin. I'm actually finding myself doubting its potential effectiveness for any kind of hormonal changes, it's been cited as having an effect on DHT levels, but, like saw palmetto, I'm just not seeing how based on what compounds it has.
EDIT: Oh fuck me. Apparently, I made the mistake of not verifying the extraction method used for the liquid extract they then tested. It was water extraction. Naturally. And, of course, that's going to skew the coumarin content DOWNWARDS. Since, like most hormone altering compounds, coumarin is lipophilic, or, lipid soluble. It'll dissolve and preserve best in lipids, slightly less in alcohol, and horridly in water.