Longevity for Cats: The Science of Healthy Feline Aging

What this guide covers

Vector Felis is the SciRouter feline longevity formula — a daily mitochondrial-health stack designed for adult and senior cats. It is built around four compounds with mechanism research relevant to cellular quality control across mammalian species, dosed for feline body weight and metabolism: urolithin A, calcium alpha-ketoglutarate (Ca-AKG), taurine, and spermidine. This guide explains what each compound does, what the published research actually shows, where the evidence is feline-specific vs. translational, and where the limitations are.

A note on language. We use structure/function language throughout. Vector Felis is a dietary supplement, not a veterinary pharmaceutical; the disclaimer at the foot of the article spells out the regulatory limits. If your cat has a diagnosed health condition (CKD is especially common in senior cats) or is on prescription veterinary pharmaceuticals, talk to your veterinarian before starting.

The feline-aging picture

Cats live, on average, 12–16 years for indoor housing. The age-related-decline pattern is broadly conserved across mammals: gradual loss of muscle mass, reduced kidney function (with the species-specific complication that CKD is extremely common in senior cats), changes in cognition and activity patterns, and shifts in immune function. The general geroscience framework — that mitochondrial dysfunction is one of the established hallmarks of aging — is summarized in a 2025 Cell review ¹. The mitochondria-as-nutritional-target framing for healthy aging is laid out in a 2024 Sports Medicine review ². The autophagy-and-caloric-restriction-mimetic literature is reviewed in ³ and ⁴.

The feline-specific aging-research literature is meaningfully thinner than the human, mouse, or even canine literatures. The general feline-nutrition-and-immune-function picture is summarized in the standard small-animal-practice references ⁵⁶. Most of the longevity-supplement research we cite below is human or cross-species; we body-weight-scale and apply feline-safety review for compounds without direct feline RCT data.

We want to be honest about this from the start: the feline longevity supplement category is younger than the human or canine equivalents, and the rigorous feline-specific RCT base for individual compounds is limited. We design Vector Felis around the compounds with the strongest mechanism story across species, doses appropriate for feline physiology, and an explicit feline-safety formulation philosophy.

Urolithin A — mitophagy activator

Urolithin A is the gut-microbial metabolite produced when ellagitannins from pomegranates, walnuts, and some berries reach the gut microbiome. The conversion is microbiome-dependent in humans; the feline picture is presumed similar but has not been characterized in detail. A 2022 mechanistic review describes urolithins as gut-microbial metabolites of ellagitannins and details their biological activities ⁷.

Mechanistically, urolithin A activates mitophagy — the selective autophagy of damaged mitochondria. The pivotal mechanism paper, Ryu et al. 2016 in Nature Medicine, demonstrated mitophagy induction and lifespan prolongation in C. elegans and increased muscle function in rodents ⁸. Subsequent reviews summarize the broader urolithin A health story ⁹¹⁰¹¹.

The human clinical evidence — Andreux 2019 safety in older adults ¹² and follow-up trials — is robust. Feline-specific clinical RCTs at Vector Felis doses do not yet exist in the public literature. We body-weight-scale from the human-trial dose range with feline-formulation safety review and dose-titration appropriate for the 3–7 kg range of typical adult cats.

The honest translational framing: urolithin A has the strongest cellular-mechanism story across species in the longevity-supplement space. Direct feline RCT data does not yet exist. We design the dose conservatively.

Calcium alpha-ketoglutarate (Ca-AKG)

Alpha-ketoglutarate is a Krebs-cycle intermediate that has been shown to extend lifespan and compress morbidity in aging mice in a 2020 Cell Metabolism paper ¹³. Earlier work in C. elegans established a mechanism via ATP-synthase and TOR inhibition ¹⁴. A 2020 Nature Communications paper described AKG's effects on age-related osteoporosis in mice via histone-methylation regulation ¹⁵. A 2022 review covered AKG dietary supplementation in humans ¹⁶.

Feline-specific Ca-AKG data is essentially absent. We body-weight-scale from the mouse food-supplementation work and the human-supplement-dose range. We design the dose conservatively for cats.

Taurine — feline-physiology essential

Taurine is included in Vector Felis primarily because of feline physiology rather than because of longevity-specific evidence. Cats are obligate carnivores who cannot synthesize taurine adequately from cysteine or methionine precursors. Taurine deficiency causes feline dilated cardiomyopathy; the foundational 1992 papers established this and showed clinical response to supplementation ¹⁷¹⁸. Modern commercial cat foods are taurine-fortified, so frank DCM from dietary deficiency is rare in cats on standard diets — but taurine is involved in retinal function, bile-acid conjugation, and several other processes, and a modest supplemental layer is defensible for senior cats on any diet.

The honest framing: taurine in Vector Felis is feline-defensive, not primary-longevity-mechanism. The lifespan-relevant mechanism story rests on urolithin A, Ca-AKG, and spermidine. Taurine is the species-specific insurance layer.

Spermidine

Spermidine is a polyamine that induces autophagy across species. The 2018 Science review by Madeo et al. covers spermidine in health and disease ¹⁹; the 2019 Cell Metabolism review on caloric-restriction mimetics provides the broader autophagy context ³; the 2018 Circulation Research paper covers autophagy specifically in cardiovascular aging ⁴.

Feline-specific spermidine data is thin. We include spermidine in Vector Felis because the autophagy-induction mechanism is conserved across mammals, the safety profile is established at modest supplementation doses, and the autophagy axis is independent of the mitophagy axis covered by urolithin A. Cellular-quality-control mechanisms are complementary across the autophagy / mitophagy / senolytic spectrum.

Considered, not in formula

For completeness:

• Resveratrol — included in Vector Canis as a complementary polyphenol; in cats we deprioritized it in favor of taurine (feline-essential) and a tighter four-compound formula.
• Fisetin — strong senolytic mechanism story in mouse research; included in NKat for inflammatory-pathway support, not in Vector Felis. Owners who want senolytic stacking can combine NKat with Vector Felis.
• NMN — strong human research base; not included in Vector Felis pending feline-specific safety data.
• Glycine — broader aging-research interest ²⁰; not included in Vector Felis primary formula.

How to think about supplement-stacking for adult and senior cats

Foundational interventions first. Diet (commercial complete-and-balanced is the safe default), hydration support (especially for senior cats), maintained body condition score, dental care, and routine veterinary visits. CKD screening becomes critical from age 10 onward — early CKD detection meaningfully changes management.

Above the foundation: Vector Felis is the daily-baseline-longevity-mechanism support; NKat is the immune-and-FHV-1-relevant complement. Specific veterinary supplements (renal-support diets and supplements; FortiFlora-class probiotics; joint supplements for arthritic seniors) are complementary and should be guided by your veterinarian.

What the research does not say

Honest limits, especially for cats:

• The feline-specific RCT base for the four Vector Felis ingredients is thin. We rely on body-weight-scaled dose translation from the human and rodent literature plus feline-safety formulation review.
• The mouse Ca-AKG lifespan data is striking ¹³; feline lifespan-extension data does not exist.
• Urolithin A's clinical strength is in humans, not in cats. Mechanism conservation is plausible across mammals; clinical magnitude in cats is unknown.
• Taurine is feline-essential, but adequate taurine intake in most cats already comes from commercial cat food. Supplemental taurine is a defensive layer, not a primary mechanism.
• Senior cats have meaningful variability — chronic kidney disease, hyperthyroidism, diabetes mellitus, and IBD are all common in older cats and meaningfully affect supplement choices and clearance.
• These are dietary supplements, not pharmaceuticals. Vector Felis supports cellular and tissue functions in cats; we do not make therapeutic claims.

Want to support this research direction?

Vector Felis is built around urolithin A, Ca-AKG, taurine, and spermidine — body-weight-scaled for adult-to-senior cats with explicit feline-safety formulation review. No allium-family ingredients, no xylitol, no essential oils, no compounds with feline-specific hepatic-glucuronidation concerns. Manufactured in NASC quality-compliant facilities. See the Vector Felis product overview for ingredient amounts, manufacturing details, and the waitlist.