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 Conditions

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 conditions

Bone mass and fracture resistance

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

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

BMDT-scoreZ-scoreFRAX

Open wiki entryOsteoporosis 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.

Open wiki entryHyperparathyroid bone diseaseExcess parathyroid hormone can push bone turnover and bone loss, but calcium and PTH need clinical context.

PTHSerum calcium25-hydroxyvitamin DBMD

Open wiki entryPaget 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.

Open wiki entryCKD-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

Open wiki entryOsteomalacia 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.

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

lesion mappainFracture and fall historyendocrine context

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

Fracture and fall historygenetic contextBMDmobility

Open wiki entryOsteopetrosis / 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.

Open wiki entryBone 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

Open wiki entryMyeloma 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.

Open wiki entryOsteomyelitis / bone infectionInfection reaches bone through blood, nearby tissue, trauma, surgery, or impaired circulation.

CRPESRMRICulturewound context

Open wiki entryOsteonecrosis / 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.

Open wiki entryAlzheimer 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

Open wiki entryAlzheimer 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

Cognitive aging and decline

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

Open wiki entryAge-related memory changeNormal aging can make learning and recall slower, but dramatic memory loss or getting lost is not just normal aging.

Episodic memoryCognitive testingActivities of daily livingHearing and vision input

Open wiki entryMild 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.

Open wiki entryHow 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.

Open wiki entryPotentially 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

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