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  2. Cholesterol - Wikipedia

    en.wikipedia.org/wiki/Cholesterol

    Biosynthesis of cholesterol is directly regulated by the cholesterol levels present, though the homeostatic mechanisms involved are only partly understood. A higher intake of food leads to a net decrease in endogenous production, whereas a lower intake of food has the opposite effect.

  3. Lipid metabolism - Wikipedia

    en.wikipedia.org/wiki/Lipid_metabolism

    Lipid metabolism is the synthesis and degradation of lipids in cells, involving the breakdown and storage of fats for energy and the synthesis of structural and functional lipids, such as those involved in the construction of cell membranes. In animals, these fats are obtained from food and are synthesized by the liver. [1]

  4. 7-Dehydrocholesterol - Wikipedia

    en.wikipedia.org/wiki/7-Dehydrocholesterol

    This is the next-to-last step of cholesterol biosynthesis. [4] Defective synthesis results in the human inherited disorder lathosterolosis resembling Smith–Lemli–Opitz syndrome. [4] Mice where this gene has been deleted lose the ability to increase vitamin D 3 in the blood following UV exposure of the skin. [5]

  5. 7-Dehydrocholesterol reductase - Wikipedia

    en.wikipedia.org/wiki/7-Dehydrocholesterol_reductase

    The protein encoded by this gene is an enzyme catalyzing the production of cholesterol from 7-dehydrocholesterol using NADPH.. The DHCR7 gene encodes delta-7-sterol reductase (EC 1.3.1.21), the ultimate enzyme of mammalian sterol biosynthesis that converts 7-dehydrocholesterol (7-DHC) to cholesterol.

  6. Biosynthesis - Wikipedia

    en.wikipedia.org/wiki/Biosynthesis

    Cholesterol synthesis pathway. More generally, this synthesis occurs in three stages, with the first stage taking place in the cytoplasm and the second and third stages occurring in the endoplasmic reticulum. [9] The stages are as follows: [12] 1. The synthesis of isopentenyl pyrophosphate, the "building block" of cholesterol 2.

  7. Ketogenesis - Wikipedia

    en.wikipedia.org/wiki/Ketogenesis

    Ketogenesis takes place in the setting of low glucose levels in the blood, after exhaustion of other cellular carbohydrate stores, such as glycogen. [10] It can also take place when there is insufficient insulin (e.g. in type 1 (and less commonly type 2) diabetes), particularly during periods of "ketogenic stress" such as intercurrent illness. [4]

  8. Is salmon or tuna healthier? There’s 2 major nutritional ...

    www.aol.com/salmon-tuna-healthier-2-major...

    Tuna is packed with niacin (vitamin B3), which helps the body convert food into energy, improve blood circulation and lower cholesterol levels, per the NIH. Tuna is also rich in vitamin B6, which ...

  9. HMG-CoA reductase - Wikipedia

    en.wikipedia.org/wiki/HMG-CoA_reductase

    HMG-CoA reductase (3-hydroxy-3-methyl-glutaryl-coenzyme A reductase, official symbol HMGCR) is the rate-controlling enzyme (NADH-dependent, EC 1.1.1.88; NADPH-dependent, EC 1.1.1.34) of the mevalonate pathway, the metabolic pathway that produces cholesterol and other isoprenoids.