Red flags in blood testing, checked

Every service, the same checks

Highest score first. Marker figures are from the plan with the longest published list. "Calculated" means ratios, indices and other values worked out from measured results. Each provider name links to its review, where every fact has its source.

Provider	Lab named	Clinician review	Measured / calculated	Marketed count	States left out
Function Healthchecked 2026-10-31	Quest Diagnostics	Yes	99 / 15 (13% calculated)	160 62% above measured	2
Superpowerchecked 2026-10-31	Quest Diagnostics / Labcorp / other third-party lab	Yes	54 / 35 (39% calculated)	100 85% above measured	9
Empirical Healthchecked 2026-10-31	Quest Diagnostics and BioReference	Yes	66 / 13 (16% calculated)	100 52% above measured	Not stated
Labcorp OnDemandchecked 2026-10-31	Labcorp	Yes	61 / 4 (6% calculated)	65	Not stated
Ulta Lab Testschecked 2026-10-31	Quest Diagnostics	Not stated	77 / 10 (11% calculated)	117 52% above measured	4
Questchecked 2026-10-31	Quest Diagnostics	Yes	61 / 6 (9% calculated)	85 39% above measured	2
Everlywellchecked 2026-10-31	Quest Diagnostics	Yes	76 / 8 (10% calculated)	83	3
Rythm Healthchecked 2026-10-31	Rythm Health's own laboratory	Yes	23 / 6 (21% calculated)	25	None
MHMarek Healthchecked 2026-10-31	Quest Diagnostics and Labcorp	Yes	103 / 13 (11% calculated)	130 26% above measured	3
Maximuschecked 2026-10-31	Not named	No	77 / 46 (37% calculated)	146 90% above measured	3
RTRequest A Testchecked 2026-10-31	Labcorp	Yes	No published list	No count claimed	4
Lifeforcechecked 2026-10-31	Not stated	Yes	50 / 4 (7% calculated)	50	Not stated
Labs by Himschecked 2026-10-31	Quest Diagnostics	Yes	63 / 10 (14% calculated)	130 106% above measured	1
LetsGetCheckedchecked 2026-10-31	Priva Path Labs Inc. d/b/a LGC Labs	Yes	5 / 1 (17% calculated)	6	1
Mito Healthchecked 2026-10-31	Quest Diagnostics	Yes	96 / 21 (18% calculated)	166 73% above measured	2
WLWalk-In Labchecked 2026-10-31	Labcorp and Quest Diagnostics	No	No published list	No count claimed	6
InsideTrackerchecked 2026-10-31	Quest Diagnostics	Not stated	48 / 1 (2% calculated)	54	None
SiPhox Healthchecked 2026-10-31	Third-party CLIA-certified	Not stated	42 / 18 (30% calculated)	60 43% above measured	2
Personalabschecked 2026-10-31	Labcorp	Yes	No published list	No count claimed	3
LBLabs by Herschecked 2026-10-31	Quest Diagnostics	Yes	No published list	No count claimed	1
myLAB Boxchecked 2026-10-31	Not named	No	No published list	No count claimed	None

What each privacy policy says

Quoted, not scored: read the line and the policy before you share a sample.

• Function Health

  Its policy says: "HIPAA does not apply to all personal information that we process."

  Read the policy
• Superpower

  Its policy says: "use or disclose such de-identified information for any purpose."

  Read the policy
• Empirical Health

  Its policy says: "We may also disclose de-identified information, so that it cannot be reasonably used to identify any individual, with third parties for marketing, advertising, research"

  Read the policy
• Labcorp OnDemand

  Its policy says: "all users linked to the account will have access to all OnDemand test results."

  Read the policy
• Ulta Lab Tests

  Its policy says: "you also have peace of mind knowing your health data is safe, secure, and confidential."

  Read the policy
• Quest

  Its policy says: "Other affiliates operated under the Quest® brand, such as Quest Consumer Inc., do not provide HIPAA covered services."

  Read the policy
• Everlywell

  Its policy says: "We may share certain categories of personal information with marketing and advertising vendors to deliver targeted advertisements"

  Read the policy
• Rythm Health

  Its policy says: "We may also use deidentified information and results for health research purposes"

  Read the policy
• MHMarek Health

  Its policy says: "Health information (e.g., information about which online visit you started)"

  Read the policy
• Maximus

  Its policy says: "Maximus does not trade, rent, or sell your personal information to third parties"

  Read the policy
• RTRequest A Test

  Its policy says: "Request A Test is subject to the same HIPAA (Health Insurance Portability and Accountability Act of 1996) Privacy Laws"

  Read the policy
• Lifeforce

  Its policy says: "We may use and disclose aggregate information"

  Read the policy
• Labs by Hims

  Its policy says: "We may sell your sensitive personal data."

  Read the policy
• LetsGetChecked

  Its policy says: "LetsGetChecked does not engage in sale of your personal information for monetary consideration"

  Read the policy
• Mito Health

  Its policy says: "We do not sell your health data, and we do not use it for targeted advertising without your consent."

  Read the policy
• WLWalk-In Lab

  Its policy says: "We will not sell or provide secure proprietary information input by customers to any outside parties."

  Read the policy
• InsideTracker

  Its policy says: "We may include your anonymized blood test information, fitness tracker information and self-reported information in disclosures to third parties"

  Read the policy
• SiPhox Health

  Its policy says: "selling Aggregated Data for medical research/bio tech research purposes."

  Read the policy
• Personalabs

  Its policy says: "Personalabs is fully compliant with U.S. HIPAA regulations"

  Read the policy
• LBLabs by Hers

  Its policy says: "We may sell your sensitive personal data."

  Read the policy
• myLAB Box

  Its policy says: "All the information and samples sent with our health testing kits as well as your test results are covered under the Health Insurance Portability and Accountability Act (HIPAA)."

  Read the policy

The warning signs, explained

• No named lab

  If a provider will not say which lab runs your sample, you cannot look up its CLIA certificate.

• No clinician review

  Some services only have a doctor sign the order. Nobody reviews your results unless you pay for it.

• Health data shared with advertisers

  The lab is covered by HIPAA. The app you buy from often is not. Read what its privacy policy allows.

• "100+ biomarkers", mostly arithmetic

  Ratios and indices worked out from other results pad a count without one extra measurement.

• A monthly price that hides the year

  A low monthly kit can cost more per year than a full membership. We show the yearly figure.

• Renewals you did not plan

  Most memberships renew at the then-current price and refund nothing once blood is drawn.