Component

Ketone-body production

Context-specific entity; species, compartment and exposure are stated on each claim.

4 recorded relationships. Experimental role, claim status and evidence remain attached to each record.

Read recorded mechanisms Open recursive mind map

How nutrients influence it

Every nutrient with a recorded effect on this component, credited to the nutrient that acted rather than the chapter that recorded it. Open a nutrient to see the findings and the conditions they were measured under.

How nutrients reach it in more than one step

Chains of two or more recorded steps that end here, grouped by the nutrient they start from. Each step is a separate finding, so a chain is a route a mechanism could take, not proof that it does.

Tracing routes…

What it does

Every recorded relationship this component is part of, grouped by its role. Plain wording comes first; the technical statement follows.

Recorded relationships

What it acts on

  1. Four patients with HMGCS2 or HMGCL deficiency had decompensation with hypoglycemia and absent urinary ketones.

    Ketone-body production → Hypoglycemia with inadequate ketone availability source_derived_draftungraded
    Experimental context and source evidence
    availability_state
    machinery_impairment Imported condition classification; unverified.
    evidence_access
    Primary abstract
    experimental_model
    Four-patient clinical, biochemical and molecular case series.
    limitations
    Distinct inherited defects; absence of urinary ketones is the reported observation.
    nutrient_topic
    Fasting physiological-state collection; human protocols, cellular deprivation and refeeding are distinguished. · Fasting / abstention from energy intake
    plain_language
    Some bodies cannot make adequate backup fuel under lipolytic stress.
    primary_references
    Inborn Errors of Ketogenesis: Novel Variants, Clinical Presentation, and Follow-Up in a Series of Four Patients. · 2024 · https://pubmed.ncbi.nlm.nih.gov/38567177/ · DOI 10.1055/s-0042-1749362
    trigger_kind
    machinery_impairment Imported condition classification; unverified.

    Fasting: fuel switching, nutrient sensing, ketone signaling, nutrient dependencies and refeeding (2026-09-18) · lines 160–166

    AI-assisted research curation; primary-abstract references and experimental limitations individually identified. Not publisher full text. · supports · Four-patient clinical, biochemical and molecular case series. · source_derived_draft · unverified_draft

    ## fast-synthesis-defects Some bodies cannot make adequate backup fuel under lipolytic stress. Four patients with HMGCS2 or HMGCL deficiency had decompensation with hypoglycemia and absent urinary ketones. Model: Four-patient clinical, biochemical and molecular case series. Limitations: Distinct inherited defects; absence of urinary ketones is the reported observation. Evidence access: Primary abstract Inborn Errors of Ketogenesis: Novel Variants, Clinical Presentation, and Follow-Up in a Series of Four Patients. · 2024 · https://pubmed.ncbi.nlm.nih.gov/38567177/ · DOI 10.1055/s-0042-1749362
    Complete structured claim and evidence

What acts on it

  1. FGF21 stimulated liver ketogenesis and white-adipose lipolysis.

    Mouse fibroblast growth factor 21 / Fgf21 → Ketone-body production source_derived_draftungraded
    Experimental context and source evidence
    evidence_access
    Primary abstract
    experimental_model
    Mouse experiments.
    limitations
    Human timing differs; shared pathway labels retain mouse context.
    nutrient_topic
    Fasting physiological-state collection; human protocols, cellular deprivation and refeeding are distinguished. · Fasting / abstention from energy intake
    plain_language
    The endocrine signal altered fuel mobilization.
    primary_references
    Endocrine regulation of the fasting response by PPARalpha-mediated induction of fibroblast growth factor 21. · 2007 · https://pubmed.ncbi.nlm.nih.gov/17550777/ · DOI 10.1016/j.cmet.2007.05.003

    Fasting: fuel switching, nutrient sensing, ketone signaling, nutrient dependencies and refeeding (2026-09-18) · lines 248–254

    AI-assisted research curation; primary-abstract references and experimental limitations individually identified. Not publisher full text. · supports · Mouse experiments. · source_derived_draft · unverified_draft

    ## fast-mouse-ketones The endocrine signal altered fuel mobilization. FGF21 stimulated liver ketogenesis and white-adipose lipolysis. Model: Mouse experiments. Limitations: Human timing differs; shared pathway labels retain mouse context. Evidence access: Primary abstract Endocrine regulation of the fasting response by PPARalpha-mediated induction of fibroblast growth factor 21. · 2007 · https://pubmed.ncbi.nlm.nih.gov/17550777/ · DOI 10.1016/j.cmet.2007.05.003
    Complete structured claim and evidence

Where it participates (unsigned role)

  1. A post-bypass patient had fasting hypoglycemia, low BHB and high free fatty acids; carnitine replacement resolved fasting hypoglycemia.

    L-Carnitine → Hypoglycemia with inadequate ketone availability source_derived_draftungraded
    Experimental context and source evidence
    availability_state
    nutrient_deficiency Imported condition classification; unverified.
    evidence_access
    Primary abstract
    experimental_model
    Cachectic 69-year-old woman, 12 years after gastric bypass; supervised diagnostic fast.
    limitations
    Single case; impaired mitochondrial transport was inferred. This is not a general carnitine supplement recommendation.
    nutrient_topic
    Fasting physiological-state collection; human protocols, cellular deprivation and refeeding are distinguished. · Fasting / abstention from energy intake
    plain_language
    Fat release was not enough when the next transport step appeared limited.
    primary_references
    Fasting hypoglycaemia secondary to carnitine deficiency: a late consequence of gastric bypass. · 2021 · https://pubmed.ncbi.nlm.nih.gov/34281938/ · DOI 10.1136/bcr-2021-241703
    trigger_kind
    nutrient_deficiency Imported condition classification; unverified.

    Fasting: fuel switching, nutrient sensing, ketone signaling, nutrient dependencies and refeeding (2026-09-18) · lines 168–174

    AI-assisted research curation; primary-abstract references and experimental limitations individually identified. Not publisher full text. · supports · Cachectic 69-year-old woman, 12 years after gastric bypass; supervised diagnostic fast. · source_derived_draft · unverified_draft

    ## fast-carnitine-case Fat release was not enough when the next transport step appeared limited. A post-bypass patient had fasting hypoglycemia, low BHB and high free fatty acids; carnitine replacement resolved fasting hypoglycemia. Model: Cachectic 69-year-old woman, 12 years after gastric bypass; supervised diagnostic fast. Limitations: Single case; impaired mitochondrial transport was inferred. This is not a general carnitine supplement recommendation. Evidence access: Primary abstract Fasting hypoglycaemia secondary to carnitine deficiency: a late consequence of gastric bypass. · 2021 · https://pubmed.ncbi.nlm.nih.gov/34281938/ · DOI 10.1136/bcr-2021-241703
    Complete structured claim and evidence

  2. FGF21 rose notably on days 7–10, after ketone concentrations had already increased.

    Fasting / abstention from energy intake → Human fibroblast growth factor 21 / FGF21 source_derived_draftungraded
    Experimental context and source evidence
    evidence_access
    Primary abstract; protocol checked in PMC4665770
    experimental_model
    Eleven volunteers; ten-day fast with daily multivitamin, 20 mEq potassium chloride and 200 mg allopurinol.
    limitations
    Small supported protocol; timing does not exclude every possible FGF21 contribution.
    nutrient_topic
    Fasting physiological-state collection; human protocols, cellular deprivation and refeeding are distinguished. · Fasting / abstention from energy intake
    plain_language
    This hormone did not precede initial human ketogenesis.
    primary_references
    FGF21 and the late adaptive response to starvation in humans. · 2015 · https://pubmed.ncbi.nlm.nih.gov/26529252/ · DOI 10.1172/JCI83349

    Fasting: fuel switching, nutrient sensing, ketone signaling, nutrient dependencies and refeeding (2026-09-18) · lines 280–286

    AI-assisted research curation; primary-abstract references and experimental limitations individually identified. Not publisher full text. · supports · Eleven volunteers; ten-day fast with daily multivitamin, 20 mEq potassium chloride and 200 mg allopurinol. · source_derived_draft · unverified_draft

    ## fast-human-fgf-delay This hormone did not precede initial human ketogenesis. FGF21 rose notably on days 7–10, after ketone concentrations had already increased. Model: Eleven volunteers; ten-day fast with daily multivitamin, 20 mEq potassium chloride and 200 mg allopurinol. Limitations: Small supported protocol; timing does not exclude every possible FGF21 contribution. Evidence access: Primary abstract; protocol checked in PMC4665770 FGF21 and the late adaptive response to starvation in humans. · 2015 · https://pubmed.ncbi.nlm.nih.gov/26529252/ · DOI 10.1172/JCI83349
    Complete structured claim and evidence

In the sources

Preserved passages that mention this component, quoted exactly. Open one to read it in context.

    This is a research prototype built from draft material. It is not medical advice, and its statements still await verification against the original studies.

    Evidence, AI assistance and curation standards