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the claim

Estrogen found in oral contraceptive pills can cause elevated levels of total cortisol.

the verdict
SUPPORTED
the evidence backs this
Recorded sources
5 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that estrogen found in oral contraceptive pills can cause elevated levels of total cortisol?

Yes. Estrogen-containing oral contraceptives elevate total cortisol levels in the blood, primarily by increasing the synthesis and concentration of corticosteroid-binding globulin (CBG).

Verdict: SUPPORTED · 5 sources for, 0 against · Last checked

The analysis

Multiple clinical studies, trials, and reviews consistently demonstrate that estrogen-containing combined oral contraceptives increase corticosteroid-binding globulin (CBG), which in turn results in significantly elevated serum total cortisol concentrations. There is no contradictory evidence in the retrieved literature regarding this physiological mechanism.

Evidence for · 5
CORTISOL METABOLISM AFTER ORAL CONTRACEPTIVES: TOTAL PLASMA CORTISOL AND THE FREE CORTISOL INDEX
1975
Demonstrates that women taking combined oral contraceptives have elevated plasma total cortisol levels.
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Brien, T. G. (1975). CORTISOL METABOLISM AFTER ORAL CONTRACEPTIVES: TOTAL PLASMA CORTISOL AND THE FREE CORTISOL INDEX. doi.org. https://doi.org/10.1111/j.1471-0528.1975.tb00609.x

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More for · 4
Effects of estradiol- and ethinylestradiol-based contraceptives on adrenal steroids: A randomized trial.
2022
Shows that ethinylestradiol-based combined oral contraceptives significantly increase total cortisol and corticosteroid-binding globulin levels.
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MH, K., RK, A., A, H., K, L., S, H., O, H., JS, T., & TT, P. (2022). Effects of estradiol- and ethinylestradiol-based contraceptives on adrenal steroids: A randomized trial.. doi.org. https://doi.org/10.1016/j.contraception.2022.08.009

Relationship between biological sex and the endocrine stress response following a binge-like dose of alcohol.
2025
Notes that combination oral contraceptive pill use is associated with higher baseline and postconsumption levels of cortisol.
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RM, A., MJ, M., R, H., MA, S., & BS, M. (2025). Relationship between biological sex and the endocrine stress response following a binge-like dose of alcohol.. doi.org. https://doi.org/10.1111/acer.70094

Hormonal contraceptive use in relation to basal and reactive testosterone, DHEAS, and cortisol.
2025
Indicates that oral contraceptive pill use is associated with increased total cortisol in blood.
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KV, C., S, F., A, C., M, A., & PH, M. (2025). Hormonal contraceptive use in relation to basal and reactive testosterone, DHEAS, and cortisol.. doi.org. https://doi.org/10.1016/j.yhbeh.2025.105806

Prospective evaluation of the effect of stopping estrogen-containing contraceptives on serum CBG and cortisol levels.
2026
Confirms that oral estrogens raise corticosteroid-binding globulin and lead to increased serum total cortisol concentrations.
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K, K., AC, H., PH, B., & JJ, H. (2026). Prospective evaluation of the effect of stopping estrogen-containing contraceptives on serum CBG and cortisol levels.. doi.org. https://doi.org/10.1210/clinem/dgag249

What does the evidence say?

Multiple clinical studies, trials, and reviews consistently demonstrate that estrogen-containing combined oral contraceptives increase corticosteroid-binding globulin (CBG), which in turn results in significantly elevated serum total cortisol concentrations. There is no contradictory evidence in the retrieved literature regarding this physiological mechanism.

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