What is the recommended dosage for adults when using valerian extracts for therapeutic indications such as nervous excitability, light anxiety, and...

What is the recommended dosage for adults when using valerian extracts for therapeutic indications such as nervous excitability, light anxiety, and difficulty sleeping?

The diverse studies that took place used doses that varied between 400 and 900mg of aqueous or hydroalcoholic extracts, corresponding from 1,5g to 3g of the drug.
It is suggested that the drug be taken in doses of 1-3g (for example, as an infusion) or the equivalent of the drug in aqueous or hydroalcoholic extract (70% ethanol at most).
For sleep disorders, take a dose, half to one hour before bedtime, or if necessary, take a previous dose during the afternoon.
a) Only the first statement is correct.
b) Only the second statement is correct.
c) Only the third statement is correct.
d) The first and second statements are correct.
e) The second and third statements are correct.