Unmatched Supps Stem Cell: Kris Gethin's Formula for Cellular Recovery and Longevity

A single 500mg dose of CyanthOx™ sea buckthorn extract was shown to mobilize three distinct circulating stem cell types within two hours. That's the anchor ingredient in Kris Gethin's new Unmatched Supps Stem Cell, a 9-ingredient cellular longevity formula.

The name isn't a metaphor or a marketing angle. Unmatched Supps Stem Cell earns its title with CyanthOx™, a sea buckthorn extract shown in a randomized, double-blind crossover trial to mobilize three distinct types of circulating stem cells within two hours of a single 500mg dose. In a supplement category full of ambitious product names, the research behind this one is unusually specific.

That specificity reflects Kris Gethin's personal investment in stem cell science. As he notes on the label, he's spent years undergoing stem cell therapies firsthand and has lived the recovery and regeneration benefits. Building an oral supplement formula around that philosophy isn't a shortcut. It's a proactive, daily approach to maintaining the cellular environment that governs how your body repairs and renews itself, which is precisely the philosophy Unmatched Supps has been building toward since launching the Unmatched Supps Longevity Multi.

Unmatched Stem Cell: A Complete Cellular Defense Stack

Stem Cell delivers on that philosophy with a targeted nine-ingredient formula. Maritech® Synergy organic fucoidan, Senactiv®, cordyceps, apigenin, astaxanthin, and the increasingly-popular Akkermansia muciniphila, AstraGin®, and Vitamin D round out the lineup, each targeting oxidative defense, mitochondrial energy, cellular renewal, or the gut-level immune signaling that supports long-term resilience.

At the price, Stem Cell is positioned squarely in premium longevity territory. Given the caliber of its branded, clinically studied ingredients we've done the research on below... we're not surprised. Let's dig in:

Unmatched Supps Stem Cell Ingredients

Each 3-capsule serving provides the following:

• CyanthOx™ (Sea Buckthorn Extract (Hippophae rhamnoides) (Fruit)) - 500mg

  CyanthOx™ is a water-soluble polyphenol extract standardized for proanthocyanidins and bioflavonoids from sea buckthorn berry, a plant with traditional use in Tibetan and Mongolian medicine and a phytochemical profile that includes quercetin, kaempferol, and isorhamnetin.^[1]

  The headline research backing this ingredient is a randomized, double-blind, placebo-controlled crossover trial in 12 healthy adults. A single 500mg dose of sea buckthorn berry proanthocyanidin extract was associated with selective increases in three circulating stem cell types -- progenitor stem cells (CD45dim CD34+ CD309-), endothelial stem cells (CD45- CD31+ CD309+), and mesenchymal stromal cells (CD45- CD90+) -- within two hours of ingestion.^[2] The selectivity matters: the mobilized cell types are linked to tissue repair and vascular maintenance, while pluripotential stem cells were largely unaffected.

  Beyond stem cell activity, sea buckthorn proanthocyanidins have shown antioxidant potency in cell research, including protection of mitochondrial membrane potential and activation of the AMPK-PGC1α-Nrf2 pathway under oxidative stress conditions.^[3] Separate work on skin fibroblasts found that sea buckthorn proanthocyanidins may support collagen I synthesis via the TGF-β1/Smads pathway while helping maintain extracellular matrix integrity.^[4]

  Unmatched's 500mg dose matches what was used in the Drapeau trial, making CyanthOx™ the anchor ingredient in this formula. Its endothelial stem cell activity pairs naturally with the vascular-level support from Maritech® fucoidan, while Senactiv®'s senolytic focus on clearing aged cells sets the stage for the regenerative response CyanthOx™ is positioned to support.

  

  Right off the bat, we can understand the price tag. This is a supplement is something special.

• Cordyceps Extract (Cordyceps sinensis) (Fruiting Body) - 500mg

  Cordyceps sinensis is a fungus with centuries of documented use in Traditional Chinese Medicine for promoting energy, vitality, and resistance to fatigue. Its primary bioactives (cordycepin, adenosine, and polysaccharides) collectively support mitochondrial function and cellular energy metabolism.^[5]

  In animal research, cordyceps supplementation upregulated key skeletal muscle metabolic regulators (AMPK, PGC-1α, and PPAR-δ), improved glucose and lactate uptake, and enhanced the antioxidant response through NRF-2 activation and its downstream targets SOD1 and TRX.^[6] Human trials in older adults support a role in healthy aerobic capacity: 12 weeks of supplementation improved metabolic threshold by 10.5% and ventilatory threshold by 8.5% compared to placebo.^[7]

  In cell-based research, a Cordyceps sinensis extract increased SirT1 expression by 33%, SirT6 by 72%, and NAD+ synthesis by 20% in skin cells.^[8] That NAD+ connection ties directly to apigenin's CD38 inhibition elsewhere in this formula: both ingredients support NAD+ availability through complementary mechanisms.

  At 500mg as a fruiting body extract, cordyceps anchors the mitochondrial energy layer of Stem Cell, supporting the cellular environment that CyanthOx™-mobilized progenitor cells return to.

• Maritech® Synergy Organic Fucus vesiculosus Extract (Whole Plant) - 250mg

  Maritech® Synergy is a certified organic, solvent-free extract from wild bladderwrack seaweed (Fucus vesiculosus), combining fucoidan (a sulfated polysaccharide) with polyphloroglucinols, marine polyphenols that contribute potent free-radical scavenging activity.^[9]

  

  Fucoidan's presence in a stem cell formula isn't arbitrary. A clinical trial found that oral fucoidan amplified the CXCR4-positive fraction of circulating CD34+ hematopoietic progenitor cells from 45% to 90% over 12 days.^[10] CXCR4 governs progenitor cell trafficking between bone marrow and peripheral blood through the SDF-1/CXCR4 axis, and fucoidan's sulfated structure appears to modulate that signaling.^[10] This is a different mechanism than CyanthOx™, which mobilizes circulating stem cells acutely -- fucoidan may support the bone marrow reservoir over a longer timeline.

  Human trials also show fucoidan helps maintain immune function: a 2.7-fold higher salivary IgA response during intensified exercise^[11], enhanced NK cell activity at 8 weeks^[12], and amplified antibody responses in elderly subjects following influenza vaccination.^[13]

  At 250mg, this sits at the lower end of human trial doses (300mg to 1g), consistent with its layered role in a multi-ingredient formula.

• Apigenin - 100mg

  Apigenin is a flavone found in chamomile, parsley, and celery that earns its place in a cellular longevity formula through CD38 inhibition. CD38 is a glycoprotein NADase whose activity increases with age, driving the age-associated decline in cellular NAD+ levels.^[14][15] By blocking CD38, apigenin helps preserve NAD+ availability, supporting the SIRT3-dependent mitochondrial pathways that govern energy production and metabolic function as the body ages.^[14]

  Apigenin also acts as an antioxidant, helping maintain cellular redox balance, and antagonizes NMDA receptors to reduce excitotoxic signaling in neurons.^[16] In animal research, it upregulated BDNF (brain-derived neurotrophic factor) in the hippocampus, contributing to mood and cognitive resilience alongside its metabolic role.^[17]

  

  At 100mg, apigenin's role in Stem Cell is to protect the NAD+ pool that cellular regeneration depends on. It complements CyanthOx™'s stem cell mobilization by maintaining the mitochondrial environment those cells return to, while Senactiv®'s senolytic clearance of aged cells and cordyceps' energy support complete the regenerative picture.

• Senactiv® (Panax notoginseng (Root) and Rosa roxburghii (Fruit)) - 100mg

  Senactiv® is NuLiv Science's standardized dual-extract blend of Panax notoginseng root and Rosa roxburghii fruit, with ginsenoside Rg1 as its principal active.^[18] Rg1 research targets two intersecting mechanisms: senolytic clearance of aged muscle cells and direct ergogenic support.

  On the senolytic side, a double-blind crossover trial in 12 trained men found that 5mg Rg1 (taken 1h before resistance exercise) lowered p16INK4a mRNA in muscle tissue to 35% of baseline, versus 50% with exercise alone.^[19] p16INK4a is a cellular aging biomarker expressed by endothelial progenitor cells (EPCs), and Rg1 also reduced myeloperoxidase (MPO) mRNA to 39% of baseline, indicating a shift toward a less inflammatory post-exercise tissue state.^[19]

  The ergogenic outcomes are backed by a separate randomized double-blind trial: Rg1 helped maintain a healthier TNF-α/IL-10 balance in quadriceps muscle, attenuated exercise-induced lipid peroxidation (TBARS), enhanced post-exercise glycogen replenishment, increased citrate synthase activity, and improved cycling time to exhaustion by approximately 20%.^[20]

  In Stem Cell, Senactiv's senolytic role pairs naturally with CyanthOx™'s EPC mobilization: clearing aged cells creates the space fresh progenitor cells can fill.

• AstraGin® (Astragalus membranaceous and Panax notoginseng Root Extracts) - 50mg

  AstraGin® is NuLiv Science's patented^[21-24] saponin extract standardized for astragalosides and ginsenosides, bioactive compounds that upregulate intestinal nutrient transporter expression and improve uptake efficiency across the gut wall.

  

  Unmatched Supps Longevity Multi+ is a 7-packet daily system that makes your average multivitamin look like child's play. We're talking clinical doses of everything from Spectra antioxidants to spermidine for cellular longevity.

  A 2026 randomized, double-blind, crossover trial in 30 healthy adults found that 50mg of AstraGin daily increased valine absorption by 14.07% and leucine by 8.34% from whey protein after four weeks, with the 60-to-80 age cohort showing the largest gains, including a 12.74% increase in total essential amino acid absorption.^[25] Blood zonulin levels fell 13.01% in the AstraGin group versus 0.9% in placebo, indicating improved gut barrier integrity alongside the absorption benefits. A separate clinical trial found AstraGin increased arginine's area under the curve by 17.3% and raised the Arg/ADMA ratio by 167.1%, pointing to enhanced nitric oxide availability.^[26]

  What's that have to do with Stem Cell? Here, AstraGin's gut integrity benefits complement Akkermansia muciniphila's mucosal layer support, while its transporter activity may also improve uptake of apigenin, astaxanthin, and other active ingredients across the formula. At 50mg, this matches the dose used in the 2026 trial exactly.

• Akkermansia muciniphila - 2.5 Billion CFU (25mg)

  Akkermansia muciniphila is a mucus-layer symbiont that makes up roughly 1-4% of the gut microbiome in healthy adults and is among the most studied next-generation beneficial bacteria.^[27] Its outer membrane protein Amuc_1100 interacts on intestinal epithelial cells to reinforce gut barrier function, while a second secreted protein, Amuc_1409, activates a signaling process to drive intestinal stem cell proliferation and epithelial renewal.^[28][29] This makes Akkermansia a natural fit in a formula built around cellular renewal.

  In a randomized, double-blind, placebo-controlled human trial in overweight, insulin-resistant adults, Akkermansia supplementation improved insulin sensitivity by 28.62%, reduced insulinemia by 34.08%, and decreased total cholesterol by 8.68% compared to placebo over three months.^[30] The organism also drives butyrate production in neighboring bacterial species by releasing acetate during mucin fermentation.^[31] On the longevity front, Akkermansia is consistently enriched in centenarian gut microbiomes, and Mendelian randomization analysis suggests a potential causal link to lifespan.^[32]

  

  Unmatched Supps Longevity Test targets testosterone optimization through 8 clinically-dosed ingredients. KSM-66 Ashwagandha, Furosap, Tongkat Ali, and apigenin work together to support natural test production while managing cortisol and estrogen.

  At 2.5 billion CFU, this dose falls below the 10 billion used in the Depommier trial, though it's appropriate within a multi-ingredient formula. Its gut barrier activity pairs with AstraGin's permeability support, and its TLR2-mediated immune signaling complements Maritech® fucoidan's immune axis effects.

• Astaxanthin 2% (Haematococcus pluvialis) (Alga) - 6mg

  Astaxanthin is a keto-carotenoid xanthophyll sourced from microalgae, with an oxygen radical absorbance capacity (ORAC) reported 100 to 500 times higher than vitamin E.^[33] Its molecular structure spans the full width of the cell membrane, quenching singlet oxygen and scavenging peroxyl radicals to help protect lipid-based structures from oxidative damage.^[34] Mechanistically, astaxanthin activates the PI3K/Akt pathway to release Nrf2 from Keap1, triggering the Nrf2-ARE signaling cascade and upregulating endogenous antioxidants including superoxide dismutase, catalase, and glutathione peroxidase.^[35] It also modulates NF-κB to help maintain a healthy inflammatory response.^[36]

  On the immune side, a randomized crossover trial found 8mg/day for four weeks countered exercise-induced decreases in 82 immune-related plasma proteins and helped normalize IgM levels within 24 hours of recovery.^[37] A 2024 meta-analysis also found astaxanthin associated with favorable shifts in LDL cholesterol, HDL cholesterol, and triglycerides across trials.^[38]

  At 6mg, this dose sits within the range used across human trials (4 to 12mg/day). Its membrane-protective antioxidant activity complements cordyceps' mitochondrial support and pairs with Maritech® fucoidan's immune axis contribution.

• Vitamin D (as Cholecalciferol) - 100mcg (4000IU, 500% DV)

  

  Unmatched Supps Immuno-IGG delivers powerful gut support with 50% immunoglobulin G content -- significantly higher than typical colostrum supplements. This dairy-free formula strengthens intestinal barrier function for better training recovery and overall performance.

  Vitamin D3 (as cholecalciferol) provides 100mcg (4,000 IU) per serving, delivering the fat-soluble prohormone whose reach extends well beyond calcium regulation and bone metabolism into immune signaling and cellular gene expression across virtually every tissue type.

  After ingestion, cholecalciferol is hydroxylated in the liver to 25-hydroxyvitamin D [25(OH)D], then converted in the kidneys to the active metabolite calcitriol (1,25-dihydroxyvitamin D). Calcitriol binds to the vitamin D receptor (VDR), which is expressed on nearly every immune cell type, where it helps regulate both innate and adaptive immune responses.^[39][40] That broad VDR distribution gives vitamin D a natural synergy with fucoidan's immune cell trafficking support and NK cell activity elsewhere in this formula.

  A 2023 meta-analysis of 80 randomized controlled trials found vitamin D supplementation associated with a statistically significant reduction in all-cause mortality (OR 0.95, 95% CI 0.91-0.99).^[41] Note the high dose, though: At 4,000 IU daily, this sits at the recognized upper limit for long-term general supplementation,^[42] so it's wise to be careful if taking additional vitamin D over the long haul.

If that's not the most unique supplement you've seen in a while (and we've seen some interesting stuff from Unmatched), then we'd love to see it, because this has a lot of novel ingredients inside!

How to Use

• When to take it: Take 3 capsules once daily with 8 to 12 oz of water.

Stacks Well With

• Unmatched Supps Longevity Multi: Kris Gethin's 7-formula daily health system; Stem Cell's cellular recovery and oxidative defense focus layers directly on top of the Longevity Multi's comprehensive nutritional foundation.
• Unmatched Supps Longevity Test: Natural testosterone support built for the long game; pairs well with Stem Cell for a complete longevity and performance recovery stack.
• Unmatched Supps Immuno-IGG: Serum-derived immunoglobulin support for the gut-immune axis; complements Stem Cell's fucoidan and Akkermansia components for a cohesive cellular defense approach.

Who It's For

• Longevity-focused adults: Those 30 and up who are actively investing in health span, cellular protection, and aging well over the long term.
• High-output athletes: Anyone with demanding training schedules who wants recovery support that operates at a cellular level, not just a muscular one.

Conclusion: A Formula That Earns Its Name

Unmatched Supps CogniShot is a stim-free liquid nootropic with 3000mg goBHB, 250mg Cognizin citicoline, and 100mg CognatiQ. No caffeine, no crash. Clean cognitive fuel you can take any time of day.

CyanthOx is the rare supplement ingredient with clinical data on stem cell mobilization specifically, and Kris Gethin and team built the rest of Stem Cell around that mechanism. Maritech fucoidan addresses immune and cellular signaling through modulation of key immune markers. Senactiv® supports the clearance of damaged cells to make way for regeneration. Cordyceps covers mitochondrial energy and adaptive recovery capacity. Apigenin, astaxanthin, and Akkermansia muciniphila round out the oxidative defense and gut-immune angle. AstraGin® ties it together with improved bioavailability across the board.

Kris Gethin's signature is on this label for a reason. He's been living the stem cell recovery philosophy for years, and Stem Cell is the dietary supplement expression of that personal commitment. It belongs in the same daily stack as Unmatched Supps Longevity Sleep, the recently-launched Unmatched Supps CogniShot, and the other longevity-oriented products Kris continues to roll out under the Unmatched Supps umbrella.

Check PricePlow below for the latest pricing and availability on Stem Cell, and sign up for Unmatched Supps alerts to stay current on every new product as it launches.