Superpower vs Rythm Blood Test: An Honest 2026 Comparison

Disclosure: Vital Signs Today may earn a commission if you buy through links on this page, at no extra cost to you. This does not influence our evidence-based assessments. We are not a medical provider; talk to a clinician before acting on test results.

Quick answer: In a superpower vs rhythm comparison, Superpower is the safer pick for most people. Its numbers are public: 100+ biomarkers (about 150 with calculated ratios), 17 plain-language health scores, an action plan, and an AI concierge, all in one annual draw for $199 a year. Rythm is a newer, longevity-focused entrant whose exact panel size and price you should confirm on its own site before buying. Want a broad, readable, documented baseline today? Go Superpower. Pick Rythm only after you verify its current panel and price fit what you actually need.

Disclosure: Vital Signs Today may earn a commission if you buy through links on this page, at no extra cost to you. This does not influence our evidence-based assessments. We are not a medical provider; talk to a clinician before acting on test results.

Superpower vs Rhythm: The Short Version

Both sit in the same fast-growing category: direct-to-consumer blood testing that skips the doctor’s referral, runs a wide panel, and hands you a modern dashboard instead of a stack of lab printouts. The pitch is identical on both sides. Get a full-body read on your biomarkers, track them over time, and catch the slow drifts (blood sugar, lipids, thyroid) before they become a diagnosis.

The thing that decides it, and the reason we lean one way, is documentation. Superpower publishes what buyers actually want to know: a fixed annual price, a marker count, what the membership includes. Rythm is a newer, longevity-leaning service, and its specifics are less settled in the public record. That is not an accusation. Plenty of good companies are early. It just means any Rythm number you see floating around online is something to confirm on its site, not a fact to bank on. So the honest framing of this superpower vs rhythm blood test decision is simple: one option is a known quantity, the other you verify before you commit.

Why does documentation carry so much weight here? Because a blood panel is only useful if you can repeat it the same way next year and trust that the numbers line up. A service that publishes its exact panel, its price, and its reference handling gives you a stable ruler. A service that keeps those details soft forces you to re-check everything each time you buy, and small changes in which markers are included or which lab runs the sample can quietly shift your results. For a test you plan to lean on for years, the boring, published option usually wins.

There is also a trust dimension that rarely shows up in the marketing. When a company states 100+ biomarkers and $199 in plain view, it is easy to hold them to it. When the specifics live only in a sales funnel or shift by promotion, you carry the burden of verification. None of that makes a newer service bad. It simply changes who does the homework, and in a superpower vs rhythm decision that homework falls on the Rythm side today.

Biomarkers: What Each Test Actually Covers

This is where most of these searches start, so let us be precise about what we can verify and what we cannot.

Superpower’s panel

Superpower runs 100+ biomarkers per draw, roughly 150 once you count calculated ratios (derived values like kidney-function estimates that are computed, not separately drawn). The panel spans what a thorough annual physical would want and then some: metabolic and blood sugar, a full lipid profile, liver and kidney function, thyroid, key hormones, inflammation markers, and a complete blood count. On top of the raw numbers, 17 health scores roll those markers into plain-language categories, so you are not staring at 150 rows guessing what matters. That breadth is published and consistent, which is exactly what you want from a baseline you will repeat next year.

Rythm’s panel

Rythm positions itself around longevity and biological-age tracking, which usually means a panel weighted toward metabolic, hormonal, and aging-related markers. We are not going to quote a specific biomarker count, because the figures circulating for newer services are easy to get wrong, and printing a number we have not verified would do you a disservice. Before you buy, check Rythm’s own site and confirm its panel includes the markers you came for. The takeaway: Superpower gives you a documented, broad, general-purpose panel; Rythm may suit a longevity-first buyer, but you have to verify its coverage yourself.

What those biomarkers actually tell you

A marker count is only half the story. The reason a broad panel matters is that the important markers rarely fail alone, and a wide draw lets you see the pattern instead of one lonely number. Here is how the main groups on a Superpower-style panel read, with the usual caveat that reference ranges vary by lab, by age, and by sex, so treat these as orientation, not a diagnosis.

Metabolic and blood sugar. Fasting glucose sits in a standard range of roughly 70 to 99 mg/dL, with 100 to 125 flagged as prediabetic and 126 or higher on two tests pointing to diabetes. Many prevention-minded clinicians prefer to see fasting glucose comfortably under 90. HbA1c reflects your average blood sugar over about three months, with under 5.7 percent considered normal and 5.7 to 6.4 percent prediabetic. The quiet hero here is fasting insulin, which often drifts up years before glucose does, so a normal glucose paired with a high insulin is one of the most useful early warnings a broad panel can surface.

Lipids. A full lipid profile gives you total cholesterol, LDL, HDL, and triglycerides. Standard targets are LDL under 100 mg/dL, HDL above 40 for men and 50 for women, and triglycerides under 150. The number cardiologists increasingly watch is ApoB, which counts the actual particles that drive plaque rather than the cholesterol they carry, and it can flag risk that a normal LDL hides. A high triglyceride paired with a low HDL is a classic metabolic-syndrome signature worth catching early.

Liver and kidney. ALT and AST are liver enzymes that typically run up to about 40 U/L, though mildly elevated ALT is one of the most common quiet findings in adults and often tracks with fatty liver rather than anything dramatic. On the kidney side, eGFR above 60 is the usual reassurance line, read alongside creatinine and, ideally, a urine test. These markers rarely make headlines, but they are exactly the slow drifts a yearly draw is built to catch.

Thyroid. TSH carries a wide standard range of roughly 0.4 to 4.0 mIU/L, and many clinicians feel best when it sits between 1 and 2.5. TSH alone can mislead, which is why free T4 and, when relevant, free T3 add the context that turns a borderline TSH into an actual read on how your thyroid is running.

Inflammation and vitamins. High-sensitivity CRP is a general inflammation gauge, with under 1 mg/L considered low cardiovascular risk, 1 to 3 moderate, and above 3 high, though an active cold or recent hard workout can spike it temporarily. Vitamin D is one of the most common deficiencies picked up on these panels, with 30 to 100 ng/mL labeled sufficient and many clinicians targeting 40 to 60. Iron studies and a complete blood count round out the picture, catching anemia, hidden iron overload, and the kind of low ferritin that explains fatigue a glucose test never would.

The point is not to memorize cutoffs. It is that a 100+ marker draw lets these signals be read together, so a single mildly off value can be understood in context instead of triggering panic or, worse, getting missed because it was never tested. That is the concrete case for breadth, and it is why we anchor this comparison on a panel whose contents are actually published.

Price: What You Can Count On

Superpower is $199 per year for the 100+ biomarkers, the 17 scores, the action plan, and the AI concierge. One caveat worth flagging up front: it is $399 in New York and New Jersey because of stricter state lab rules, so if you live there, run your math with that number. Either way, the figure is fixed and public, so you know your total before you sign up.

For Rythm, we are not going to print a price we have not confirmed. DTC longevity services often use per-panel or membership pricing that shifts with promotions and tiers, and a stale number helps nobody. See the provider for current pricing, then compare it like-for-like: total annual cost, how many draws are included, and whether retests cost extra. That is the only way to know if Rythm is actually cheaper or pricier than Superpower for what you get. The practical point in any rhythm vs superpower call: with Superpower you know the bill upfront; with Rythm, do the homework first.

It also helps to translate price into cost per marker, because a cheaper sticker on a thin panel is not always the better deal. At $199 for 100+ biomarkers, Superpower lands near two dollars per marker before you even count the 17 scores, the action plan, and the concierge. A single specialty test ordered on its own can cost more than that one marker alone. When you compare Rythm, do the same math on its verified panel: divide the real annual price by the markers you actually care about, and check whether a second draw or any retest is bundled or billed separately. Retests are where these services quietly diverge, since the whole value of tracking depends on being able to re-measure without a painful add-on fee.

How to Prepare So the Numbers Are Real

Whichever service you choose, the single biggest source of a confusing result is not the lab, it is how you showed up for the draw. A few controllable variables move these markers enough to change your category, so it is worth getting them right the first time.

Fasting. Most comprehensive panels ask for 8 to 12 hours of water-only fasting, mainly because food spikes glucose and triglycerides. Longer is not better. Fasting past 14 hours can actually push glucose up as your body releases stored sugar, so aim for the window the service specifies rather than overachieving.

Time of day. Book a morning draw when you can. Cortisol, testosterone, and iron all follow a daily rhythm and read highest in the early morning, so a 4 p.m. hormone panel and an 8 a.m. one are not the same test. If you are tracking year over year, keep the time of day consistent so you are comparing like with like.

Exercise, alcohol, and hydration. A hard workout in the 24 to 48 hours before a draw can elevate liver enzymes and CRP, which then reads as inflammation that is really just muscle recovery. Alcohol the night before nudges triglycerides and liver markers. Dehydration concentrates your blood and can make several values look artificially high, so drink normal water even while fasting.

Medications and supplements. Biotin, common in hair and nail supplements, can distort thyroid and hormone assays, so many labs advise pausing it for a couple of days first. Never stop a prescribed medication for a test without asking your prescriber, but do note what you take, because that context is what turns a number into a decision.

The common misread to avoid: treating one out-of-range value from a single draw as a verdict. Biology fluctuates, labs have error bars, and the prep above explains most surprises. A genuine trend shows up when the same marker stays off across two properly prepared draws, which is exactly why the tracking these services sell is worth more than any one snapshot.

The Experience: Draw, Dashboard, and Follow-Up

Markers and price get the clicks, but the experience is what you live with after you pay.

Superpower is built around one comprehensive annual draw and a dashboard that does the interpreting for you. The 17 health scores translate raw labs into categories a non-clinician can read, the action plan tells you what to do next, and the AI concierge lets you ask, in plain English, what a marker means, why it might be off, and what tends to move it. For someone who wants clarity rather than a data dump, that interpretation layer is the headline feature.

Rythm, as a longevity product, tends to emphasize trend tracking and aging-related scoring. Whether its dashboard, draw logistics, and follow-up match Superpower’s depth is something we cannot confirm in detail, so check its current materials before you assume. As a general rule with newer services, expect the software and support to still be maturing.

One thing applies to both: neither is a clinic. Both are screening and tracking services, not diagnostic providers. Any result that lands outside the normal range should be reviewed with a licensed clinician before you act on it. Treat either dashboard as the start of a conversation, not the diagnosis itself.

When to Retest and How the Markers Connect

For a generally healthy adult, once a year is the sensible cadence, which is why an annual membership model fits most people. But a normal draw does not mean set it and forget it. If you change something meaningful, a new medication, a serious training block, a weight-loss push, or a dietary overhaul, a three to six month recheck of the affected markers tells you whether the change is working better than the bathroom scale ever will.

The connections between markers are the reason a broad panel pays off. High fasting glucose rarely travels alone. It tends to arrive with elevated triglycerides, a lower HDL, a creeping ApoB, and sometimes a nudge in liver enzymes and CRP, because insulin resistance touches all of them at once. Seeing that cluster is far more actionable than seeing any single number, and it is the difference between a panel that names a problem and a single test that hints at one. When your dashboard flags one value, the useful next question is always which neighboring markers moved with it.

This is also where the “screening, not diagnosis” line earns its keep. A panel can show you the pattern, but a clinician confirms what it means and rules out the things a screen cannot see. Use the retest to watch the trend, and use a real appointment for anything that stays out of range.

A realistic example makes this concrete. Say a 38-year-old runner feels fine but runs a Superpower baseline. Glucose and HbA1c look normal, but fasting insulin sits high, ApoB is borderline, and vitamin D is low. No single number would have raised alarm on a standard five-marker physical, and none of it causes symptoms yet. Together, they tell a story: early insulin resistance forming under a normal glucose, a particle count worth watching, and an easy vitamin fix. Three months later, after cutting late-night carbs and adding a supplement, a targeted recheck shows insulin trending down and vitamin D restored. That is the whole value of a broad, repeatable panel in one loop, and it is the kind of outcome a documented service is built to deliver.

Who Each One Suits

Here is the straight call.

Pick Superpower if you are: a generally healthy adult who wants one broad, readable annual baseline; someone tired of getting 5 to 10 markers at a standard physical; a person who values plain-language scores and a plan over raw numbers; or anyone who wants a known price and a documented panel before committing at $199 a year.

Consider Rythm if you are: specifically focused on longevity and biological-age tracking, and willing to verify its current panel and pricing on the provider’s site to confirm the fit. For a niche, aging-first goal it may earn a look, but only after that check.

For the broad middle of the market, Superpower is our recommended pick, on the simple logic that a documented, readable panel at a fixed price beats a less-settled unknown. If you want even more clinical depth or twice-yearly retesting, Function Health is the heavier alternative worth weighing, at 160+ biomarkers and two draws a year for $365.

Our Verdict

In the superpower vs rhythm blood test matchup, our recommendation for most readers is Superpower, for one concrete reason: you can see exactly what you are buying. 100+ biomarkers (about 150 with calculated ratios), 17 health scores, an action plan, and an AI concierge, for $199 a year ($399 in New York and New Jersey). Rythm may be a fair option for a longevity-first buyer, but its specifics are newer and less documented, so verify its panel and price before you decide.

The best blood test is the one whose results you understand, act on, and can budget for. On all three counts, Superpower is the easier yes today. Rythm earns the nod only if you confirm it covers a longevity goal Superpower does not, at a price that holds up against the $199 you would otherwise pay.

Related reading on Vital Signs Today

• Superpower vs Everlywell: Membership Panel vs Single Kits
• Superpower vs SiPhox Health: Full Draw vs Finger-Prick
• Superpower Blood Test vs Function Health: Panel-by-Panel (2026)
• Superpower Blood Test Review (2026): Is It Worth the Membership?

Frequently asked questions

Superpower vs Rhythm: which tests more biomarkers?

Superpower publishes its count: 100+ biomarkers, about 150 counting calculated ratios, in one annual draw. Rythm does not have a marker count we can verify here, so check its site directly. If you want a documented, broad panel today, Superpower is the safer bet.

Is Superpower or Rythm cheaper?

Superpower is a fixed $199 per year ($399 in New York and New Jersey). We do not quote a Rythm price we have not confirmed, since DTC pricing shifts with promotions and tiers. See the provider for current pricing, then compare total annual cost like-for-like.

Is the Superpower blood test legit compared to Rythm?

Yes. Superpower runs samples through accredited labs and is a legitimate screening and tracking service, not a diagnostic clinic. Rythm is a newer entrant; confirm its lab partners and accreditation on its own site. The rhythm vs superpower question is about documentation and fit, not whether the testing is real.

Should I pick Rythm for longevity tracking?

Possibly, if longevity and biological-age tracking is your specific goal and Rythm’s verified panel covers the markers you want. Check that panel and its price first. Superpower’s broad annual baseline already covers most longevity-relevant markers at a known $199.

What about Function Health in a superpower vs rhythm decision?

If you want maximum depth, Function Health is the heavier alternative: 160+ biomarkers, two draws a year plus a 6-month retest, for $365. It costs more than Superpower’s $199 but tests more. Weigh it alongside both if clinical thoroughness is your priority.

How should I prepare for a Superpower or Rythm blood draw?

Fast on water for 8 to 12 hours, book a morning slot for accurate hormone and iron readings, skip alcohol and hard workouts for a day or two beforehand, stay normally hydrated, and note any supplements like biotin that can skew thyroid and hormone assays. Consistent prep is what makes year-over-year tracking trustworthy.

How often should I get a full-body blood test?

Once a year suits most healthy adults, which is why an annual membership like Superpower fits the typical case. Recheck specific markers three to six months after a big change, such as a new medication, a weight-loss effort, or a diet overhaul, so you can see whether it actually moved the numbers.

What does it mean if one marker comes back out of range?

Usually less than it feels like. A single out-of-range value can reflect prep, a recent workout, an infection, or normal lab variation. A real signal is a marker that stays off across two properly prepared draws, ideally alongside related markers. Anything persistently abnormal should be reviewed with a licensed clinician.

Is a broad panel worth it if I feel fine?

That is exactly who it helps most. Early metabolic drift, low vitamin D, borderline thyroid, and rising ApoB rarely cause symptoms until they are advanced. A documented annual baseline like Superpower’s 100+ markers is designed to surface those quiet trends while they are still easy to fix.