liu wei di huang wan (90 tablets, 750mg each) - great nature great nature our version is a 7:1 concentrated extract in a 750mg caplet. great nature classics are a highly concentrated, thoroughly-tested line of classical chinese formulas. all great nature classics chinese formulas are: extracted and tableted at a facility that meets fda cgmp standards; manufactured using traditional hot water extraction coupled with essential-oil recapturing for maximum potency of the finished product; third party tested; 7:1 concentration ratio in a densely packed 750 mg caplet provides stronger dosing with fewer caplets; serving size is 2250 mg or 3 caplets. note: the date on the bottles of great nature products is the manufacturer date (the date the product was made). the manufacturer suggests using the encapsulated and tableted formulas within 5 years of the manufacturer date.