It’s a classic, spine-tingling tale: the promise of immortality in exchange for that sweet, sweet blood coursing through your veins.
Move over, Dracula. A growing coven of health tech companies offers direct-to-consumer blood testing, seducing health-conscious individuals with the promise of a longer, healthier life by detecting diseases and conditions early, perThe Verge.
Since time immemorial, humans have been trying to calculate, predict, and extend their lifespans. Still, those efforts have accelerated with increased focus on personalized, preventive health care, and technological advances in diagnostics and testing.
In 2025, the direct-to-consumer testing market was valued at $4.7B and is expected to grow to $16.1B by 2033.
Rather than waiting for symptoms to appear, many want a more proactive approach to improve their odds or detect signs of chronic diseases early. For some, these at-home tests feel like a faster, more empowering approach to managing health than navigating a labyrinthine healthcare system.
And plenty of companies want to help:
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The Death Clock app ($69/year) estimates life expectancy and potential death date using lifestyle data, medical history, and an optional free blood panel.
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Oura sells blood tests ($99) through a partnership with Quest Diagnostics to complement its Ring health tracker.
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Whoop partnered with Quest for a suite of targeted blood tests ($299).
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Apple Health is partnering with Quest to let users order test for 50+ biomarkers ($119) in the Health app.
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Function’s annual membership ($365) includes twice-yearly blood panels and an add-on full-body MRI for under $1k.
While the allure of gazing into your future in exchange for blood (and data) may seem tempting, critics argue that direct-to-consumer testing can downplay the role of doctors and lead to over-testing, unnecessary follow-ups and treatments, and undue anxiety. Also, many conditions can’t be detected by these tests, and different tests can offer conflicting results.
Due to a lack of FDA approval, healthcare professionals caution that these tests should be considered tools for learning more about aging, rather than a means of diagnosis. Others warn that the tests could negatively affect health insurance, loans, and more because federal privacy laws typically don’t protect sensitive health data.
So if you’re considering one of the blood tests, keep in mind that just like vampires, you have to invite them in.
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