Can peptides affect birth control effectiveness?

There's no evidence that peptides interfere with hormonal contraceptives. However, if you experience significant weight loss from GLP-1 peptides, fat-soluble hormone levels may fluctuate. Use additional contraception if concerned and discuss with your gynecologist. <a href='https://www.cdc.gov/reproductivehealth/contraception/index.htm' target='_blank'>CDC Contraception Info</a>