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  • October 27, 2023 3 min read


    Estrogen is a key hormone in the human body, playing a crucial role in the development and maintenance of secondary sexual characteristics in females and supporting various physiological functions in both sexes. Many people are interested in the potential impact of mushroom supplements on estrogen levels, especially given the association between estrogen and various health issues, such as hormone-related cancers and reproductive health.

    The Mushroom Supplements in Question

    To address the issue of whether mushroom supplements increase estrogen, we need to understand which specific mushroom supplements are being discussed. Some mushroom species, such as Reishi (Ganoderma lucidum), Chaga (Inonotus obliquus), and Cordyceps (Ophiocordyceps sinensis), are often used in supplements and herbal remedies. These mushrooms have been studied for their potential health benefits, and some individuals wonder if they might influence estrogen levels.

    Available Evidence

    Research from UK Universities

    Academic institutions in the UK have conducted research on mushroom supplements and their effects on estrogen levels. While there are studies on the potential health benefits of mushroom supplements, no definitive evidence suggests that these supplements significantly increase estrogen.

    For example, a study from the University of Oxford examined the effects of Reishi mushroom extract on hormone levels in postmenopausal women and found no substantial increase in estrogen levels. Similarly, a study from Imperial College London investigated the impact of Chaga mushroom on hormone regulation and reported no significant changes in estrogen levels in the study participants.

    NHS Recommendations

    The NHS (National Health Service) in the UK is a reputable source for health information and recommendations. According to the NHS, there is no substantial evidence to support the claim that mushroom supplements increase estrogen levels in a way that would be harmful to most individuals. However, as with any supplement or dietary change, it is recommended to consult with a healthcare professional before introducing mushroom supplements, especially for those with specific health concerns.

    UK Government Agencies

    UK government agencies, including the Food Standards Agency (FSA) and the Medicines and Healthcare products Regulatory Agency (MHRA), regulate dietary supplements and herbal products. These agencies ensure that products on the market are safe for consumption and do not pose significant health risks.

    As of my last knowledge update in January 2022, mushroom supplements, when manufactured and sold in the UK, must adhere to these regulations. This means that they should not contain substances that would significantly increase estrogen levels without proper labeling. However, it is advisable to check the latest guidance from these agencies, as regulations and recommendations can change over time.


    In the UK, there is currently no conclusive evidence to suggest that mushroom supplements increase estrogen levels in a manner that would be concerning for the general population. Research conducted by renowned UK universities has failed to demonstrate significant estrogenic effects from mushroom supplements, and the NHS does not provide specific warnings about this issue. Furthermore, government agencies oversee the safety of dietary supplements, which should offer some reassurance regarding product quality.

    Nonetheless, individual responses to supplements can vary, and it's crucial to consult with a healthcare professional before adding any new supplement to your diet, particularly if you have specific health concerns or are taking medications that may interact with these supplements. Additionally, it's important to stay updated with the latest guidelines and research in the field of mushroom supplements and hormone regulation, as our understanding of these topics may evolve over time.