An interesting 2017 study looking at the flavonoid kaempferol (in kale, spinach, dill, tarragon) showed a potent inhibitory effect on both mRNA levels and protein levels of estrogen receptor, IGF-1
doi:10.1530/joe-16-0600
These properties make copper peptides a valuable option for improving barrier integrity and reversing signs of oxidative stress in sensitive or aging skin
From the selected studies, the following data were extracted: first authors name, publication year, sample size, study location, mean age of participants, intervention (type, dose, and duration of supplementation), study design and end-point values (as means and sd) for the number of follicles, endometrial thickness, TT, progesterone, serum LH levels, serum FSH levels, E2 and SHBG in both intervention and control groups
Neither is approved for anti-aging or general fat loss, and both are prohibited in sport by WADA