Immune support
Immune
Also searched as Immune.
You want it keen: sharp surveillance is the body's first and best defense.
In depth
Immune surveillance — the standing patrol that detects and clears pathogens and aberrant cells.
What drives it
Parasite burden reduces it.
A placebo-controlled trial of deworming before vaccination, a systematic review and meta-analysis, and a restoration experiment. Verbatim: “… antihelminthic treatment with … albendazole versus a placebo one month prior to immunization with a seasonal influenza vaccine.”. PMC4459874
Radiation exposure reduces it.
Verbatim: “机体免疫系统是辐射损伤的敏感系统, 其中T淋巴细胞敏感性最高。机体由于辐射损伤产生免疫功能紊乱状态, 表现为免疫活性细胞数量减少.”. PMID 24161486
Cytokine signaling increases it.
PMC11565648 — Darnell, Kerr & Stark 1994, Science 264:1415 — JAK-STAT signaling transduces cytokine and interferon signals into transcriptional activation of immune-response genes. PMC11565648
Clears worn-out cells increases it.
Senescent cells do not simply sit there — they call for removal. The senescence-associated secretory phenotype releases CCL2, CXCL1 and IL-15, which recruit macrophages, neutrophils and natural killer cells into the tissue, and senescent cells display MICA and ULBP2 for the NKG2D receptor so they can be recognized (PMC10983694, PMC12487400). The process has its own name — senescence surveillance. Shown by disruption: blocking NK-mediated surveillance caused senescent cells to accumulate and liver fibrosis to worsen. PMC10983694
Interferon response increases it.
leprae infection persistent IFN exposure suppresses effective pathogen clearance. Acute IFN activates immunity; sustained IFN suppresses it. Provenance: previously cited PMC7255347 could not be confirmed and has been replaced. PMC7255347
Body clock increases it.
Controlled laboratory studies have shown that short-term circadian misalignment and sleep restriction independently impair physiological processes, including insulin sensitivity, energy expenditure, immune function, blood pressure and cardiac modulation by the AUTONOMOUS nervous system. The laboratory design separated them. The rhythm is in the immune system itself: circadian regulation of immune responses is evident in the rhythmic expression of cytokines and the fluctuation in the number and activity of immune cells. And it has an actionable consequence the reviewers name: chronomodulated vaccine schedules represent a promising strategy to improve vaccine efficacy — time of day as a dosing variable. doi 10.1101/gad.352180.124 · PMC12529610
Sleep increases it.
Sleep deprivation weakens the immune system by reducing the production of infection-fighting substances, and chronic sleep loss may contribute to weakened immune defense, increasing susceptibility to infections and disease. doi 10.1016/j.smrv.2011.05.001 · PMC3132857
Cellular aging reduces it.
The hallmarks literature describes what drives aging and what aging drives, in the same reviews. Named across five inflammaging and hallmarks-of-aging reviews. The systemic inflammation stemming from dysbiosis adversely affects multiple organ systems, and the reviews trace increased frailty, diminished physical capacity, cognitive impairment, and elevated mortality risk as the shared downstream set. doi 10.1016/j.molmet.2023.101755 · PMC11233824
Digestion increases it.
10.3389/fimmu.2020.00282 — This is what the symptom costs rather than what it causes physiologically. It is shown at reduced weight because no separate effect size has been reported for this arm. The asymmetry is deliberate and stated. The gut is the largest mucosal immune surface, named in the gut-liver reviews. doi 10.3389/fimmu.2020.00282
Bone health increases it.
10.3389/fimmu.2020.00058 — immunoporosis runs both ways: the bone marrow is the source of the immune cells that regulate remodeling. Verbatim: “In the past decade it has become evident that bone tissue can also regulate immune cell development”. doi 10.3389/fimmu.2020.00058 · PMID 23839529 · PMC3762579
Clears blocked nose & sinuses reduces it.
Barrier disruption facilitates microbial colonization and Staphylococcus aureus biofilm persistence. PMC12446768
Urinary health increases it.
Raised vaginal pH above 5.0 promotes overgrowth of gram-negative rod fecal flora, inducing vaginal infection and UTI - the pH loop reaching a clinical endpoint. PMC10692865
Glutamine status increases it.
Lymphocyte proliferation is glutamine-dependent. Carried by the intermediary-metabolism, micronutrient and redox reviews. doi 10.3390/nu18132141 · PMC9967593
Senescent cell signaling increases it.
NF-kB suppression causes escape from immune recognition by natural killer cells; BRD4 inhibition blunts the SASP and leads to reduced NK-cell-mediated immunosurveillance of senescent cells. doi 10.1016/j.cellsig.2011.12.006 · PMID 21979375 · PMC7767554
What it drives
It increases Arterial plaque.
The intima retains macrophages, T lymphocytes, and mast cells, and reviews name immune cell recruitment and activation and metabolic reprogramming within immune cells among the core processes driving plaque progression and vulnerability. Partly overlaps the Neuroinflammation → Atherosclerosis link, drawn alongside it: that edge carries the cytokine arm, this one the cellular arm. The split is defensible but not sharp, and is stated rather than hidden. PMC5666716
It reduces Calm skin barrier.
Named across six reviews of atopic dermatitis and psoriasis as part of the shared barrier-inflammation mechanism set. doi 10.3389/fimmu.2025.1541776 · PMC11007107
It reduces Balanced skin cell turnover.
Named across six reviews of atopic dermatitis and psoriasis as part of the shared barrier-inflammation mechanism set. doi 10.3389/fimmu.2025.1541776 · PMC11007107
It reduces Bone health.
A reframing worth carrying: immune cells such as T and B cells, dendritic cells and macrophages significantly influence osteoclast formation via cytokine secretion, leading to a view of bone loss as an immunological disorder as well as a skeletal disease. The concept of immunoporosis has emerged to describe bone loss associated with chronic low-grade inflammation due to aging, obesity, autoimmune disease and metabolic dysfunction. That is inflammaging arriving in the skeleton under its own name. PMC10648156
It reduces Joint wear.
Named across six reviews of bone remodeling and osteoarthritis pathogenesis. Bone remodeling relies on the coordinated actions of bone-resorbing osteoclasts, bone-forming osteoblasts, and osteocytes serving as mechanosensors and local remodeling coordinators. PMC10648156
It reduces Liver.
Two routes, not one: microbial metabolites reach the liver via the portal vein, and separately the immune cells activated by these metabolites can also reach liver through lymphatic circulation. And a targeted mechanism: gut-primed lymphocytes expressing mucosal homing receptors migrate aberrantly to the liver, where they may contribute to biliary epithelial cell injury - the cells are addressed to the gut and arrive at the liver. doi 10.1038/s41522-022-00352-6 · PMC11265038
It increases Digestion.
Named across six gut-liver axis reviews. The main alteration is dysbiosis - A decrease in beneficial bacteria, an increase in potentially harmful microbes, and a loss of overall microbial diversity - with intestinal barrier integrity determining the levels of microbial metabolites, ENDOTOXINS and ammonia that reach the liver and systemic circulation. doi 10.1038/s41522-022-00352-6 · PMC11265038
It reduces Neurovascular calm.
Named across six migraine pathophysiology reviews. Migraine pathogenesis is widely accepted to be attributed to neuroinflammation and sensitization of the trigeminovascular system. PMID 36361791 · PMC10933035
It reduces Clears blocked nose & sinuses.
This is the same axis as eczema, and it splits the same way: type 2 endotypes are IL-4/IL-5/IL-13-driven and eosinophilic, while non-type-2 endotypes ARE driven by increased Th1 and Th17 responses, resulting in elevated neutrophil levels. Two endotypes, two cell types, two nodes. And the intervention evidence is unusually direct: dupilumab (IL-4Ralpha inhibitor) reduces polyp burden and restores smell, while MEPOLIZUMAB (anti-IL-5) and OMALIZUMAB (anti-IgE) address specific endotypes - three biologics, three targets, three endotype-matched responses. PMC11059040
It reduces Eases allergy load.
This is the same axis as eczema, and it splits the same way: type 2 endotypes are IL-4/IL-5/IL-13-driven and eosinophilic, while non-type-2 endotypes ARE driven by increased Th1 and Th17 responses, resulting in elevated neutrophil levels. Two endotypes, two cell types, two nodes. And the intervention evidence is unusually direct: dupilumab (IL-4Ralpha inhibitor) reduces polyp burden and restores smell, while MEPOLIZUMAB (anti-IL-5) and OMALIZUMAB (anti-IgE) address specific endotypes - three biologics, three targets, three endotype-matched responses. PMC11059040
It reduces Urate clearance.
The architecture is unusually clean and worth stating: gout has two separable stages. Stage one is metabolic - urate underexcretion through renal and gut mechanisms is the major mechanism for hyperuricemia in most people, via URAT1, GLUT9 and ABCG2. Stage two is immunological - MSU crystals function as damage-associated molecular patterns which, upon phagocytosis by macrophages, activate the NLRP3 inflammasome through a two-step process: priming via NF-kB signaling and activation via lysosomal rupture, potassium efflux, and mitochondrial ROS. And the two stages come apart in people: not all individuals with hyperuricemia show deposition of MSU crystals OR develop gout. Local factors decide - reduced joint temperature, low pH, high sodium concentration, and preexisting joint damage. A urate number is not a diagnosis. The treatment target is explicit: long-term lowering of serum urate to less than 360 MICROMOL/L leads to crystal dissolution and ultimately to suppression of flares. PMID 39712248 · PMC8268734
It increases Recovery.
10.3389/fimmu.2023.1251784 — Recovery is assembled from the sarcopenia and VO2max literatures; none of the papers cited studied recovery itself. doi 10.3389/fimmu.2023.1251784
It increases Gut-brain signal.
Every link on this pathway inherits one taVNS produced opposite effects split by baseline RMSSD. High baseline tone - heart rate and TNF-alpha significantly increased and vagally mediated HRV significantly decreased versus sham. The same intervention helped one group and harmed the other. Diagnostic stratification failed where biological stratification worked: NO difference in any outcome between MDD participants and controls. doi 10.3390/biomedicines13030700 · PMC12689627
It increases Resists infection.
The headline on this pathway is a disappointment and it must stay there: the lack of effect of prophylactic vitamin C supplementation on the incidence of common cold in normal populations throws doubt on the utility of this wide practice. Regular supplementation decreases cold duration by 8 percent (3-12) and severity by 15 percent (CI 9-21) - but does not reduce how often you get one. With one striking exception that defines WHO it works for: a subgroup of six studies of marathon runners, skiers, and soldiers exposed to significant cold AND/OR physical stress experienced, on average, 50 percent reduction in common cold incidence. Extreme physical stress is the condition under which it prevents. PMC10712193
Blends that modulate it
Each blend page names this pathway and carries the study behind its claim.
See it on the map
Open the causal map to follow this pathway upstream and downstream, arrow by arrow, each with its study.