Legalon (Milk Thistle Extract)

Anyone out there know what dosage and frequency to use for Legalon (Milk Thistle Extract)and whether it should be used during or after steroid cycling?
Thanks

I have been using milk thistle for the past 4 years without a break. 1000mg a day split in three doses. In that time I have done several cycles that included 6 week periods of anadrol use @ 50 or 100mg/day. Post cycle blood tests have always shown normal liver function.