Function Health

A new price. The same depth of data—now $365 a year. That’s $1/day for more hikes, more hugs, and to unlock more healthy years. functionhealth.com

@ashhpollard Younger where it counts 👏

I’ll take it. 🙇🏻‍♀️ The receipts always come due. @function

Cortisol affects more than mood and energy. ✅Knowing your levels matters. That’s why Function members test Cortisol annually. Citations in bio. Not medical advice. Consult a medical professional with any medical questions. For marketing purposes only.

Some cases of treatment-resistant high blood pressure may involve underlying hormonal factors, including excess Cortisol. Over time, chronically elevated levels have been associated with: 🚩Cardiovascular disease 🚩Metabolic dysfunction 🚩Cognitive changes

What if high blood pressure isn't always a heart problem—but a hormonal one? Here’s what the research shows. ⬇️

@EvaGoolsby2 Function is 100% insurance-free. No surprise bills or hidden fees. Your Function Health membership may qualify for HSA/FSA reimbursement, helping you get more from your pre-tax health savings. Check with your plan administrator to confirm eligibility.

@function Would Medicare A&B pay for this Tests?😲🧓

A new price. The same depth of data—now $365 a year. That’s $1/day for more hikes, more hugs, and to unlock more healthy years. functionhealth.com

@CBoddicker Hi Carson. We're sorry this happened and want to make it right. Can you please send us a DM so we can collect your information through our secure channels and reach out to you directly?

PSA: If you can’t schedule your annual labs with @function, don’t expect help. I asked for assistance or a refund. Instead, they refunded me $120 less than I paid and offered zero support. Wild business model. @superpower, looking for a new customer?

@iliveulongtime Noted. We appreciate the feedback and have shared it with our team for future consideration.

@function But that's what $400 for a full package? I just want Cystatin C

Hey @functionhealth genuine question. My panel runs creatinine and creatinine-based eGFR, but no Cystatin C. For anyone with above-average muscle mass or who supplements creatine, creatinine-based eGFR is exactly the number that reads falsely reassuring. Cystatin C is the muscle-independent, hydration-independent marker that sees through that. The CKD-EPI cr-cys equation is the current standard for a reason. Why isn't it even an add-on?

For Tova, every birthday past 39 is a milestone. That's the age her father died of cancer. Every year since has felt like both a gift and a reminder: never take your health for granted. That's why she gets an annual MRI. Because the goal isn't simply to live longer. It's having more time with the people she loves. Now available to all Function members in 200+ locations.

@meanderer007 @drmarkhyman Can you please check in your message requests.

@function @drmarkhyman Haven't seen any DM from you yet.

Poort experience with @function as a WOMAN for test scheduling. Their inflexibility to allow separating hormone panel from fasting required testing suggests NO WOMAN was consulted while doing test grouping. @drmarkhyman #functionhealth

@ashhpollard Love seeing you take control of your health. 👏

Annual blood work. ✅ First time going through @Function after hearing so many great things. Testing over 100+ biomarkers! Excited to see what it shows. Optimizing your health starts with knowing your baseline.

@INaina7773 Way to reverse the clock.

Two months postpartum I ran my bloodwork with @function health. Chronological age: 32 Biological age: 18.3 And this was WITH crazy hormones and sleep deprivation while breastfeeding. What I credit: -Cooking every single meal at home -Olive oil, quality meat, tons of veggies -Fiber + omega-3 supplements -Vitamin ADK, creatine daily -@bryan_johnson 's Longevity Mix — genuinely the thing that kept me alive through the sleep-deprived and the c-section recovery. Not medical advice, just my n=1 🧬

@RichardV_PS5 Hi Richard. Thanks for reaching out. We've passed this along to the team so they can look into this. Please send us a DM if you have any additional information to share.

@function Dev team, the app won’t open on iPhone running the latest update if any media is playing. Could you please look into this issue? Sometimes will not load even without anything running in the background.

True Story: Ana was a lifelong marathon runner. But she was battling muscle pain, twitching, brain fog, and crushing fatigue. Function helped uncover critically low ferritin and sodium, key markers that were missed for years. Now, she’s showing up stronger and more energized for the people she loves. Function member since 2025. Function gives you access to 160+ lab tests to get deeper insights into your health. Join today for $365/ year and take control.

@themichaelkonen Love seeing you take control of your health. Low ferritin is worth exploring further. Our Private AI Chat can help you understand your results, build a tailored action plan, and prepare for a more informed conversation with your doctor.

@bryan_johnson I just completed my first @function panel and my ferritin is at 16ng/ml! 1 of 7 things that are "Out of Range". What are other options to increase ferritin? I will also be checking with my family doc, but wanted to check with other possible routes there are.

I had low iron for 11 years. Yes, even when I ate meat, my ferritin was low and averaged 38 ng/mL. I’ve finally boosted it back to healthy levels. You can see my protocol below. On the surface, my low ferritin was easy to dismiss by most standards of care. Most doctors miss this or don't investigate it deeply enough, including mine during those years. I get it. The human body is complicated and the science is constantly evolving. My hemoglobin and hematocrit were normal. Ferritin measures stored iron, while hemoglobin measures circulating iron, and because the body drains its reserves first to keep hemoglobin normal, you can be fully iron deficient with a perfectly normal hemoglobin and hematocrit. This is why my low ferritin kept getting dismissed: the numbers that define anemia looked fine, so no one asked why my iron reserves wouldn't refill. During these 11 years, before doing health stuff and when on my longevity protocol, I sadly did not fully understand how important iron was to my body. Now, everywhere I look, I see iron playing a central role. Still, during those 11 years, I tried everything to fix it, including eating meat and every type of oral iron supplementation, using every timing trick and every formulation. None of the iron would stick and we couldn’t figure out why. I overhauled my medical team earlier this year. With greater capacity, we revisited everything. Then we discovered my autoimmune gastritis (AIG). With AIG, my stomach doesn't make enough acid to absorb iron. The only route left was to bypass the gut and deliver it intravenously. Most people treat anemia as the threshold to watch. But long before hemoglobin drops, low iron starves the enzymes your cells depend on: the ones your mitochondria use to make energy, synthesize DNA, build dopamine and other neurotransmitters, and power immune defense. That is why you can feel fatigue, brain fog, and worse endurance even with normal hemoglobin and an otherwise "normal" iron panel. We did a deep dive on possible iron infusion therapies. I ended up getting a 1000mg monoferric infusion. Why we chose Monoferric: > Monoferric is more tolerable, allowing a higher dose of up to 1000 mg > a complete replenishment dose in one infusion > other IV irons require multiple infusions (3-5) > head-to-head randomized trials show it causes hypophosphatemia in only about 8% of patients compared to 74% with Injectafer > its most common side effects are mild nausea and rash occurring in roughly 1% of patients > other options, including Iron dextran (INFeD), carries a black-box FDA warning for potentially life-threatening allergic reactions and requires a mandatory test dose before each new treatment course > it's very expensive. Your doctor can write a letter to your insurance company to justify medical necessity. Ferritin levels post infusion: + 205 ng/mL 2 weeks post infusion + 195 ng/mL 4 weeks post infusion Our target is 80 ng/mL. We will continue to monitor. Levels are expected to settle around 6-8 weeks post-infusion. The lessons I’ve learned: + don’t mess with low iron + don’t accept it as ok + it could be pointing to a more serious problem + try your preferred method to correct: meat, supplements, etc. + and if it doesn’t correct, investigate why, and consider an infusion

@swang111 Great question. Elevated iron is worth looking into. Try our Private AI Chat to better understand your results, build tailored action plans, and prepare for a more informed conversation with your doctor.

@function My iron levels are too high. What do you suggest to lower it? Recently had your tests and love that I've got a snapshot of what my body is doing so that I can make corrections where required.

If your iron levels aren’t budging, read this. 🧵

4 Biomarkers to monitor: 1️⃣Iron: The active iron circulating in your blood right now. A snapshot, not the full picture. 2️⃣Ferritin: Your iron storage protein. Levels can begin to shift before iron levels do, making it one of the earlier signals to watch. 3️⃣Iron % Saturation: Measures how much of your iron carrier protein (known as transferrin) is in use. 4️⃣Iron Binding Capacity: Shows how well your blood can bind iron to carry throughout the body. All 4 are included in Function membership. Part of 160+ lab tests. Citations in bio.

Supplementing is just part of the equation. Timing, pairing, and absorption inhibitors all affect how much your body actually uses. Getting that strategy right can support healthy iron levels. Here are the tests to know where you stand. ⬇️