Hip
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Betulinic acid, which is naturally found in the chaga mushroom, has potent in vitro antiviral effects against echovirus 6 (and possibly for other echoviruses), with an amazingly low EC50 of 0.007 μM, a study found.
By a pharmacokinetic calculation I performed, around 100 mg of betulinic acid daily would also have good in vivo antiviral potency for echovirus in humans, comparable to the potency of commercial antiviral drugs.
So for ME/CFS patients with active echovirus infections, betulinic acid (or chaga mushroom containing betulinic acid) may be worth looking into.
You can buy liposomal betulinic acid here and here, in capsules containing 50 mg. This MCS Formulas brand provides a high dose of betulinic acid.
Chaga mushrooms (Inonotus obliquus) of the type which grow on birch trees contain betulinic acid. Some chaga mushroom supplements contain 2% betulinic acid (so 1 gram of such supplements will provide 20 mg of betulinic acid).
Betulinic acid also has anti-cancer effects. But at the same time, can induce DNA damage in cells.
By a pharmacokinetic calculation I performed, around 100 mg of betulinic acid daily would also have good in vivo antiviral potency for echovirus in humans, comparable to the potency of commercial antiviral drugs.
So for ME/CFS patients with active echovirus infections, betulinic acid (or chaga mushroom containing betulinic acid) may be worth looking into.
You can buy liposomal betulinic acid here and here, in capsules containing 50 mg. This MCS Formulas brand provides a high dose of betulinic acid.
Chaga mushrooms (Inonotus obliquus) of the type which grow on birch trees contain betulinic acid. Some chaga mushroom supplements contain 2% betulinic acid (so 1 gram of such supplements will provide 20 mg of betulinic acid).
Betulinic acid also has anti-cancer effects. But at the same time, can induce DNA damage in cells.
A study found a single oral 100 mg/kg dose of betulinic acid in rats led to a blood plasma Cmax of 1.16 μg/ml = 2.54 μM.
So to achieve the EC50 concentration of 0.007 μM, a rat dose of 100 x 0.007 / 2.54 = 0.28 mg/kg would be required.
To convert rat mg/kg doses to human mg/kg doses, we divide the former by 6.2, giving a human dose of 0.28 / 6.2 = 0.045 mg/kg. So for an 80 kg adult, that corresponds to an oral dose of 3.6 mg.
However, this dose does not take into account the plasma protein binding of betulinic acid, which is >70%. Factoring in the protein binding, we get an oral dose of 3.6 x 100 / (100 - 70) = 12 mg being one which achieves the EC50 concentration in the blood.
Thus a human oral dose of 100 mg of betulinic acid should achieve blood levels of betulinic acid around 8 times the EC50, which will have a good antiviral effect in vivo.
So to achieve the EC50 concentration of 0.007 μM, a rat dose of 100 x 0.007 / 2.54 = 0.28 mg/kg would be required.
To convert rat mg/kg doses to human mg/kg doses, we divide the former by 6.2, giving a human dose of 0.28 / 6.2 = 0.045 mg/kg. So for an 80 kg adult, that corresponds to an oral dose of 3.6 mg.
However, this dose does not take into account the plasma protein binding of betulinic acid, which is >70%. Factoring in the protein binding, we get an oral dose of 3.6 x 100 / (100 - 70) = 12 mg being one which achieves the EC50 concentration in the blood.
Thus a human oral dose of 100 mg of betulinic acid should achieve blood levels of betulinic acid around 8 times the EC50, which will have a good antiviral effect in vivo.
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