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Description
Research has shown that COC use, irrespective of brand or type, results in circulating endogenous estrogen concentrations similar to those of the early follicular phase of the menstrual cycle (2050 pg/ml), although some formulations are associated with levels as high as 95100 pg/ml 6,8,9

PMCID: PMC9168854

It can also be taken as a supplement if you are not a big fan of seafood

Biomolecular mechanism of urinary stone formation involving osteopontin
