Longevity & Aging · Supplements · Diets

ketones/ketosis (beta-hydroxybutyrate) increases clearance of misfolded proteins

In plain terms: Does being in ketosis help the brain clear the sticky misfolded proteins seen in Alzheimer's?

Leans support(Animal or laboratory evidence) Longevity & Aging 🐭 Non-human evidence

RefutedContestedStrong support

consensus score 1.00

Why the rating is limited: animal or laboratory evidence.

The studies that point for or against this claim are all animal or laboratory studies. They do not establish the claimed effect in people.

Before this limit: strong support. Final rating: leans support.

In aged and Alzheimer's-model mice and cells, the ketone BHB shifts misfolded proteins toward an insoluble, clearable state and boosts autophagy, but this is animal/mechanism evidence only, not shown to help people.

📅 Last reviewed: 2026-07-14 ⓘ

Evidence ladder

How far up the ladder this claim has climbed. A high consensus on a low rung means "consistent so far," not "proven in people."

Top evidence so far: Animal studies (Animal)

MechanismIn-vitroAnimalObservationalRCTMeta-analysis

How the studies fall

8 support 0 contradict 0 tested null 0 mixed · 8 sources, 7 independent groups

What the evidence shows

In aged and Alzheimer's-model mice and in cells, beta-hydroxybutyrate shifts misfolded proteins toward clearance, driving autophagic degradation of tau and reducing amyloid burden with recovered cognition. Every counting row is animal or cell work, so this is a well-replicated preclinical mechanism with no human evidence behind it.

The evidence (8)

Source	Grade	Stance	Quality	Finding
Hu LT, Xie XY, Zhou GF, Wen QX, Song L, Luo B, Deng XJ, Pan QL, Chen GJ 2023 · J Alzheimers Dis	animal	supports	moderate	HMGCS2/ketone-body axis drives autophagic degradation of tau via ANKRD24 in mouse models; mechanism, not human.
Xu Y, Jiang C, Wu J, Liu P, Deng X, Zhang Y, Peng B, Zhu Y 2022 · CNS Neurosci Ther	animal	supports	moderate	Ketogenic diet lowers amyloid burden, neuroinflammation & cognitive deficit in AD mouse model; downstream, not direct proteostasis.
Nie L, Sun J, Xu W, Yang X, Wang G, Wang Y, Jiang T, Cao Y, Chen H, Xia Q, Zhou X 2026 · Commun Biol	animal	supports	moderate	Exogenous BHB reduces hippocampal Abeta/p-Tau aggregation & restores cognition in MASLD-cognitive mouse model; animal only.
Madhavan SS, Roa Diaz S, Peralta S, Nomura M, King CD, Lin A, Bhaumik D, Shah S, Blade T, Gray W, Chamoli M, Eap B, Panda O, Diaz D, Garcia TY, Stubbs BJ, Lithgow GJ, Schilling B, Verdin E, Chaudhuri AR, Newman JC 2023 · bioRxiv	animal	supports	moderate	Preprint version of the same proteostasis finding; BHB regulates protein solubility in aged/AD brain. Same group/data as 39626664.
Yin JX, Maalouf M, Han P, Zhao M, Gao M, Dharshaun T, Ryan C, Whitelegge J, Wu J, Eisenberg D, Reiman EM, Schweizer FE, Shi J 2016 · Neurobiol Aging	animal	supports	moderate	Peripheral ketone administration blocked amyloid-beta entry into neurons, reduced amyloid burden and improved learning/memory in an AD mouse model.
Qin Y, Bai D, Tang M, Zhang M, Zhao L, Li J, Yang R, Jiang G 2023 · Brain Res	animal	supports	moderate	Long-term ketogenic diet raised beta-hydroxybutyrate and reduced amyloid-beta deposition and cognitive dysfunction in APP/PS1 mice.
Madhavan SS, Roa Diaz S, Peralta S, Nomura M, King CD, Ceyhan KE, Lin A, Bhaumik D, Foulger AC, Shah S, Blade T, Gray W, Chamoli M, Eap B, Panda O, Diaz D, Garcia TY, Stubbs BJ, Ulrich SM, Lithgow GJ, Schilling B, Verdin E, Chaudhuri AR, Newman JC 2025 · Cell Chem Biol	mechanism	supports	high	BHB binds/insolubilizes misfolded proteins in aged & AD-model brain, shifting soluble->insoluble aggregates toward clearance; mouse+in-vitro.
Huang H, Xu K, Lardellia M 2026 · Cells	animal	supports	moderate	Ketone-dependent restoration of autophagy & mitochondrial quality control via VPS35 in an AD model; animal/mechanism.

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Educational only, not medical advice. Grades and scores reflect published evidence weighted by study design and quality; see the methodology.