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theblood is on a mission to close the gender data gap. The company enables females to test their menstrual blood on a regular basis to have a better overview of their overall health and blood data. The Berlin startup offers the blood-tests as a subscription service to its customers. The customer gets the data points to her phone and can then address health issues more directly.


Key Data



Berlin, Germany

Founded 2022

Partnered 2022

 Isabelle Guenou

Miriam Santer

 Listed in Forbes 30 under 30, Extensive waiting list for full launch in 2023

Why we love theblood

Until 1993 the inclusion of females in clinical studies was not mandatory by law but would have been scientifically necessary to understand the differences in health effects of conditions and pharmaceuticals. Through the opportunity for females to get regular blood tests, they can better understand their bodies and detect deficiencies. The smart period blood makes that possible. With better knowledge about their health and deficiencies, women can also better understand menstrual pain and take action to reduce it. The testing of menstrual blood has further advantages, for example, it has got more data points than venous blood due to the tissue that can be collected with the sample.

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SDG Alignment


Good health and well-being:

Ensure healthy lives and promote well-being for all at all ages


Gender equality:

Achieve gender equality and empower all women and girls


Reduced inequalities:

Reduce inequality within and among countries

The Founders

Co-founder and CEO Isabelle Guenou part of the Forbes 30 under 30 list in 2022, was a professional athlete and swimmer when she discovered that menstrual pain and solutions for taking action were massively stigmatised. Therefore, in 2022 she decided together with her co-founders to start theblood to empower menstruating women to increase their knowledge and data set about their health. Isabelle's strengths and experiences lie in communication and brand strategy. 


Miriam Santer co-founded theblood and is the COO. She has a business background, experience in business development, and had previously founded before joining Isabelle and founding theblood. Miriam, together with Isabelle, was part of the Forbes 30 under 30 list in 2022, the same year they founded the company.

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