Research reference only. BioConst updates and corrects content over time, but it cannot replace clinician-guided diagnosis, treatment, medication, or testing decisions.

Aging biology / loss of homeostasis

Biology runs on set-points. We track the ones that fail with age.

Map the age-related loss of biological repair capacity without making treatment claims.

Read the note Evidence Tracker

Bone

Bone conditions, organized by what fails.

A low-friction map of major bone-condition families. Cards link to existing source-backed research until dedicated condition pages are reviewed.

Bone

Bone mass and fracture resistance

Conditions where bone strength, density, quality, or falls make low-trauma fracture more likely.

Low bone mass / osteopeniaLow bone mass / osteopeniaBone density is below the young-adult reference range, but the label alone is not a treatment instruction.

BMDT-scoreZ-scoreFRAX

Osteoporosis and fragility fractureOsteoporosis and fragility fractureBone loses enough strength that a low-trauma fall or ordinary load can cause a fracture.

BMDT-scoreFRAXFracture and fall history

Hormone and remodeling disorders

Conditions where bone remodeling speed or hormone signals become the central problem.

Hyperparathyroid bone diseaseHyperparathyroid bone diseaseExcess parathyroid hormone can push bone turnover and bone loss, but calcium and PTH need clinical context.

PTHSerum calcium25-hydroxyvitamin DBMD

Paget disease of bonePaget disease of boneFocal remodeling becomes excessive and disorganized, producing enlarged but structurally abnormal bone.

Alkaline phosphataseX-rayBone scanpain

Mineralization and kidney-mineral control

Conditions where mineral deposition or kidney-mineral hormone control changes the meaning of bone data.

CKD-MBDCKD-mineral and bone disorder / renal osteodystrophyKidney disease can change phosphate, calcium, PTH, vitamin D metabolism, bone turnover, and calcification context.

eGFR / kidney functionPhosphateSerum calciumPTH25-hydroxyvitamin D

Osteomalacia and ricketsOsteomalacia and ricketsBone matrix is present, but mineralization is defective; in children this can disturb growing bones.

25-hydroxyvitamin DSerum calciumPhosphateAlkaline phosphatase

Structural, systemic & secondary

Inherited, developmental, and structural fragility

Conditions where collagen, osteoclast function, mosaic lesions, or skeletal development alter strength.

FD/MASFibrous dysplasia / skeletal mosaicismFocal fibro-osseous lesions can replace normal bone and marrow, creating pain, deformity, or fracture risk.

lesion mappainFracture and fall historyendocrine context

OIOsteogenesis imperfecta and heritable fragilityInherited fragility often involves collagen biology; fractures cannot be reduced to calcium intake or BMD alone.

Fracture and fall historygenetic contextBMDmobility

osteopetrosisOsteopetrosis / high-density brittle boneBone can become dense but brittle when resorption fails; high density is not automatically strong bone.

BMDosteoclast functionmarrow contextFracture and fall history

Tumor, marrow, and systemic bone destruction

Bone involvement from cancer or marrow disease, kept separate from everyday bone-fragility concerns.

Bone tumors and metastatic bone diseaseBone tumors and metastatic bone diseaseCancer can arise in bone or spread to bone; this belongs in a separate oncology-aware context.

X-raypainfracture riskoncology context

Myeloma bone diseaseMyeloma bone diseasePlasma-cell disease in marrow can create osteolytic lesions by increasing breakdown and suppressing formation.

marrow contextosteolytic lesionspainfracture risk

Blood supply, infection, and tissue destruction

Conditions where blood flow failure or infection damages living bone tissue.

Osteomyelitis / bone infectionOsteomyelitis / bone infectionInfection reaches bone through blood, nearby tissue, trauma, surgery, or impaired circulation.

CRPESRMRICulturewound context

AVNOsteonecrosis / avascular necrosisBone tissue dies when blood supply is disrupted; this is a vascular and structural problem.

MRIpaincollapse stageblood supply

Open the condition index

Brain

Memory and cognition, organized by what fails.

A source-backed map for memory, cognitive aging, MCI, Alzheimer disease, and the factors that can change cognitive function.

Memory and cognitive decline

Alzheimer disease and neurodegeneration

How Alzheimer disease disrupts memory networks, synapses, amyloid, tau, and brain volume over time.

Alzheimer diseaseAlzheimer disease: memory-network failureAlzheimer disease first disrupts memory-related networks such as the entorhinal cortex and hippocampus, then spreads across brain systems.

Hippocampus / entorhinal memory networkBeta-amyloidTauSynaptic plasticityBrain atrophy

Alzheimer disease: treatment boundariesAlzheimer disease: treatment boundariesCurrent anti-amyloid antibodies can slow progression in some early Alzheimer contexts, but they are not a promise to bring lost memory back.

Anti-amyloid antibodiesARIABeta-amyloidCognitive testing

synapse rebuildingCan synapses be rebuilt, and can neurons be backed up?If neurons and network scaffolding remain, some synaptic compensation may be possible; correctness can only be inferred, and neurons cannot be biologically backed up today.

Synapse lossSynaptic plasticityBrain atrophyHippocampus / entorhinal memory networkCognitive testingAlzheimer biomarkersSV2A PET / synaptic density imaging

Alzheimer root causeWhat is the root cause of Alzheimer disease?Synapse loss is close to the memory problem, but Alzheimer disease is not explained by one root cause.

Beta-amyloidTauSynapse lossSynaptic plasticityBrain atrophy

synapse rebuilding AlzheimerIf synaptic connections came back, would that treat Alzheimer disease?Rebuilding the right working memory-network connections would be a core treatment effect, but more synapses alone would not be enough.

Synapse lossSynaptic plasticityHippocampus / entorhinal memory networkBrain atrophyBeta-amyloidTau

Cognitive aging and decline

The boundary between slower recall, mild cognitive impairment, and dementia-level daily-life loss.

Episodic memoryCognitive testingActivities of daily livingHearing and vision input

MCIMild cognitive impairmentMCI means more memory or thinking problems than peers, while daily independence is mostly preserved.

MCICognitive testingActivities of daily livingEpisodic memory

Memory systems and forgetting

How experiences become memory, why recall fails, and why forgetting is not one single process.

How memory is stored and lostHow memory is stored and lostMemory is not a file in one place; it is built through brain networks, synaptic changes, consolidation, and later retrieval.

Episodic memoryHippocampus / entorhinal memory networkSynaptic plasticitySleep and memory

Modifiable context and treatment boundaries

Modifiable cognition context

Sleep, vascular risk, sensory input, mood, delirium, medicines, and other factors that can change cognition.

reversible memory loss factorsPotentially modifiable memory-loss factorsSome memory problems are shaped by sleep, blood pressure, sensory loss, depression, delirium, medicines, alcohol, smoking, and chronic disease context.

Sleep and memoryVascular risk and brain healthHearing and vision inputDepression, delirium, and medication contextCognitive testing

Open the brain index

Heart

Cardiac function, organized by what fails.

A source-backed map for coronary blood supply, pump reserve, rhythm, valve flow, heart muscle, and pressure load.

Supply, pump, and rhythm

Coronary blood supply and ischemia

Conditions where the heart muscle does not receive enough oxygen-rich blood.

Coronary heart disease and ischemiaCoronary heart disease and ischemiaPlaque-narrowed coronary arteries can limit oxygen-rich blood reaching heart muscle.

Coronary blood flowAtherosclerotic plaqueLDL cholesterolTroponinECG / EKG

Pump reserve and pressure load

Conditions where the heart cannot pump enough, fill well, or faces sustained pressure load.

CHFHeart failure and pump reserveThe heart cannot pump enough oxygen-rich blood for the body’s needs, even though it has not stopped.

Ejection fractionBNP / NT-proBNPEchocardiographyVascular risk and brain health

Rhythm and electrical control

Conditions where heartbeat timing or conduction becomes the main problem.

AFibAtrial fibrillation and rhythm lossAtrial fibrillation is a common treated arrhythmia where irregular upper-chamber rhythm changes clot and stroke context.

ECG / EKGHeart rate and rhythmStroke-risk contextCoagulation balance

Structure and vascular load

Vascular and metabolic load

Blood pressure, cholesterol, vascular disease, and metabolic context that change cardiac risk.

High blood pressure and heart loadHigh blood pressure and heart loadSustained high blood pressure makes the heart work harder and can contribute to heart, stroke, kidney, and vessel problems.

Vascular risk and brain healthVascular loadLDL cholesterolCoronary blood flow

Valves, structure, and heart muscle

Valve flow, chamber shape, and heart-muscle disorders that change cardiac function.

Cardiomyopathy and heart-muscle diseaseCardiomyopathy and heart-muscle diseaseHeart muscle can become thicker, stiffer, enlarged, or weak, changing pump and rhythm stability.

EchocardiographyEjection fractionBNP / NT-proBNPECG / EKG

Heart valve disease and flow directionHeart valve disease and flow directionValve stenosis or regurgitation changes how blood moves through and out of the heart.

EchocardiographyHeart valve flowHeart murmurEjection fraction

Open the heart index

Blood

Blood function, organized by what fails.

A source-backed map for oxygen carrying, iron context, clotting, bleeding, platelets, marrow production, and blood cancers.

Oxygen carrying and clotting balance

Clotting and bleeding balance

Conditions where blood clots too much, too little, or in the wrong context.

Bleeding disorders and clotting-factorBleeding disorders and clotting-factor contextBleeding disorders affect how the body controls clotting through platelets, clotting factors, or acquired disease context.

Clotting factorsPlatelet countPT / INRHemoglobin

DVTClotting disorders and thrombosisBlood may form clots too often or without injury, creating deep vein, lung, heart, or stroke context.

Coagulation balanceD-dimerPT / INRPlatelet count

Iron and blood production context

How iron stores, marrow production, and red-cell size change anemia interpretation.

Iron-deficiency anemia and productionIron-deficiency anemia and production contextIron shortage can limit healthy red-cell production, but iron markers need inflammation, bleeding, diet, and absorption context.

FerritinIron testsHemoglobinMCV

Red cells and oxygen carrying

Conditions where red blood cells or hemoglobin cannot deliver enough oxygen signal.

Anemia and oxygen-carrying capacityAnemia and oxygen-carrying capacityAnemia means the blood has fewer healthy red cells than needed, so the body receives less oxygen-rich blood.

Complete blood count (CBC)HemoglobinHematocritRed blood cell count

Sickle cell disease and flow blockageSickle cell disease and flow blockageInherited hemoglobin changes can make red cells sickle-shaped, less flexible, and able to block blood flow.

HemoglobinRed blood cell shapeBlood-flow blockageComplete blood count (CBC)

Platelets, marrow, and malignancy context

Blood cancers and marrow context

Malignant blood-forming tissue problems kept separate from routine blood-count interpretation.

Leukemia and blood-forming tissueLeukemia and blood-forming tissueLeukemia starts in blood-forming tissue such as bone marrow and can crowd normal red cells, white cells, and platelets.

White blood cell countComplete blood count (CBC)Bone marrow productionPlatelet countHemoglobin

Platelets and marrow production

Platelet number, platelet function, and marrow production problems.

Thrombocytopenia and platelet countThrombocytopenia and platelet countLow platelet count can make bleeding control harder and may reflect production, destruction, or disease context.

Platelet countComplete blood count (CBC)Bone marrow productionCoagulation balance

Open the blood index

Liver

Liver function, organized by what fails.

A source-backed map for liver-cell injury, bile flow, fat context, scarring, and synthetic function.

Cell injury, bile, and synthesis

Bile flow and bilirubin handling

Conditions where bile flow, bilirubin handling, or jaundice context changes interpretation.

Cholestasis, bilirubin, and bile flowCholestasis, bilirubin, and bile flowReduced bile flow or bilirubin handling can make jaundice and liver-panel interpretation more complex.

Bile flow and cholestasisBilirubinAlkaline phosphatase in liver contextLiver imaging and structure

Liver-cell injury and enzyme signals

Conditions where liver cells are injured and enzyme patterns enter the clinical context.

Viral hepatitis and liver inflammationViral hepatitis and liver inflammationHepatitis viruses can inflame or injure the liver, and some forms can become chronic.

Hepatitis virus contextAlanine aminotransferase (ALT)Aspartate aminotransferase (AST)BilirubinLiver synthetic function

Synthetic and metabolic reserve

Conditions where albumin, clotting context, detoxification, or metabolic reserve is the central issue.

Loss of liver synthetic reserveLoss of liver synthetic reserveAlbumin and clotting context can signal that liver function is no longer just an enzyme problem.

Liver synthetic functionAlbumin blood levelPT / INRBilirubin

Inflammation, fibrosis, and cancer context

Fatty liver and metabolic context

Conditions where fat in the liver is tied to metabolic risk, inflammation, or fibrosis context.

NAFLDFatty liver disease and steatosisFat in the liver can reflect metabolic context and may require fibrosis-aware interpretation.

Hepatic steatosisAlanine aminotransferase (ALT)Aspartate aminotransferase (AST)Liver fibrosisLiver stiffness and elastography

Fibrosis, cirrhosis, and cancer context

Conditions where long-term injury changes liver structure, scarring, portal context, or cancer risk.

Cirrhosis and liver scarringCirrhosis and liver scarringCirrhosis is advanced scarring that changes liver structure and synthetic, portal, and cancer-risk context.

Liver fibrosisLiver stiffness and elastographyAlbumin blood levelPT / INRPlatelet count

HCCLiver cancer and structural contextPrimary liver cancer belongs in a structural and oncology-aware context, not ordinary liver-panel interpretation.

Liver imaging and structureLiver fibrosisHepatic steatosisHepatitis virus contextLiver synthetic function

Open the liver index

Kidney

Kidney function, organized by what fails.

A source-backed map for filtration, albumin leakage, fluid balance, acute injury, stones, and kidney failure context.

Filtration, albumin, and fluid balance

Fluid, electrolytes, and acid-base context

Conditions where kidney control of water, salts, and blood chemistry affects the clinical picture.

Kidney failure and replacement-therapyKidney failure and replacement-therapy contextKidney failure is the point where kidney function is no longer enough and dialysis or transplant context may enter care.

Dialysis and transplant contextEstimated glomerular filtration rate (eGFR)Kidney electrolyte balanceKidney fluid balanceSerum creatinineBlood urea nitrogen (BUN)

Filtration and waste clearance

Conditions where kidney filtration, creatinine, eGFR, or urea handling becomes central.

CKDChronic kidney disease and filtration lossCKD is a long-term kidney-damage context where GFR and urine albumin are central signals.

Estimated glomerular filtration rate (eGFR)Serum creatinineUrine albumin-to-creatinine ratio (UACR)AlbuminuriaVascular risk and brain healthKidney electrolyte balance

Urine protein and glomerular barrier

Conditions where albumin leakage signals kidney barrier damage or microvascular context.

Albuminuria and glomerular barrier leakAlbuminuria and glomerular barrier leakAlbumin in urine can signal kidney barrier damage and needs repeat, context-aware interpretation.

AlbuminuriaUrine albumin-to-creatinine ratio (UACR)Glomerular filtration barrierSerum creatinine

diabetic kidney diseaseDiabetic kidney disease and microvascular contextDiabetes can damage kidney blood vessels; albumin and eGFR help frame kidney-risk context.

Diabetes kidney-risk contextAlbuminuriaUrine albumin-to-creatinine ratio (UACR)Estimated glomerular filtration rate (eGFR)Vascular risk and brain health

Acute injury, stones, and failure context

Acute injury and sudden function loss

Conditions where kidney function changes quickly and needs clinical time-course interpretation.

AKIAcute kidney injury and sudden function lossAKI is a sudden kidney-function change where time course, creatinine, urine output, and context matter.

Acute kidney injury contextSerum creatinineBlood urea nitrogen (BUN)Kidney fluid balanceKidney electrolyte balance

Stones, obstruction, and urine flow

Conditions where crystals or obstruction disrupt urine flow and kidney pressure context.

Kidney stones and urine-flow obstructionKidney stones and urine-flow obstructionKidney stones are mineral deposits that can block urine flow and change pain, infection, and kidney-pressure context.

Kidney-stone crystal contextUrinary obstructionKidney imaging and urine flowKidney fluid balance

Open the kidney index

Lung

Lung function, organized by what fails.

A source-backed map for airflow, gas exchange, infection, scarring, sleep breathing, and pulmonary blood-flow context.

Airflow, gas exchange, and infection

Airflow and airway inflammation

Conditions where airways narrow, inflame, or obstruct airflow.

Asthma and airway inflammationAsthma and airway inflammationAsthma is a chronic airway condition where inflammation and narrowing make airflow harder at times.

Airway inflammationAirflow obstructionSpirometryOxygen saturation

COPDCOPD and airflow obstructionCOPD involves lung or airway damage that blocks airflow and makes breathing harder over time.

Airflow obstructionFEV1/FVC contextSpirometryOxygen saturationLung gas exchange

Infection and lung-tissue inflammation

Conditions where infection fills or inflames air spaces and changes breathing context.

Pneumonia and air-sac infectionPneumonia and air-sac infectionPneumonia is infection in one or both lungs where air sacs can fill with fluid or pus.

Lung infection contextAlveoli / air sacsOxygen saturationChest imaging in lung contextComplete blood count (CBC)

Scarring, sleep breathing, and blood flow

Scarring and restrictive lung context

Conditions where stiff or scarred lung tissue limits breathing and gas transfer.

Pulmonary fibrosis and lung scarringPulmonary fibrosis and lung scarringPulmonary fibrosis makes lung tissue thick, stiff, or scarred, which can make gas transfer harder.

Pulmonary fibrosis scarLung diffusion capacityLung gas exchangeChest imaging in lung contextOxygen saturation

Sleep breathing and pulmonary blood flow

Conditions where breathing rhythm during sleep or blocked lung blood flow changes oxygen context.

PEPulmonary embolism and lung blood-flow blockagePulmonary embolism is a blood-flow blockage in the lung and belongs in urgent clinical context.

Pulmonary blood flowOxygen saturationArterial blood gas (ABG)D-dimerChest imaging in lung context

Sleep apnea and breathing interruptionSleep apnea and breathing interruptionSleep apnea is repeated breathing pause or shallow breathing during sleep that changes oxygen and sleep context.

Sleep breathing interruptionOxygen saturationLung gas exchangeVascular risk and brain health

Open the lung index

Problem

BioConst

Aging appears as drifting biological set-points: bone remodeling, lipid regulation, immune repair, follicle cycling, and tissue renewal all become harder to hold. BioConst studies that loss of control as a research problem, not as medical advice.

The work starts with evidence tracking. Each note separates animal work, early human signals, clinical trials, and unsupported claims, with sources attached to every factual data point.

Research discussion only. Not medical advice.

Operating Rule

Receipts before claims.

Every public fact, number, or model baseline is attached to a visible source. Estimates are marked as estimates. Boundaries stay close to the result.

Initial Evidence Tiers4framework to human data

Source Set5linked references

BoundaryNo adviceresearch discussion