Functional foods and nutraceuticals in metabolic diseases.
| Bioactive compound | Typology/examples | Main mechanisms of action | Reference |
|---|---|---|---|
| Functional foods & nutraceuticals (general) | Polyphenols, omega-3 fatty acids, fibers, phytosterols, peptides | Regulation of insulin sensitivity, lipid metabolism, mitochondrial function and inflammation | [42] |
| Resveratrol | Grapes, red wine (stilbene) | Activation of AMPK and SIRT1; increased mitochondrial biogenesis; enhanced fatty acid oxidation; improved insulin sensitivity | [43] |
| Resveratrol | Experimental obesity models | Reduction of hepatic fat accumulation (~20–30% in animal models); decreased plasma glucose (~10–15%); attenuation of systemic inflammation | [44] |
| Resveratrol | Diet-induced obesity models | Improvement of metabolic and inflammatory parameters | [45] |
| Curcumin | Curcuma longa (turmeric polyphenol) | Inhibition of NF-κB; activation of Nrf2–ARE antioxidant pathway | [46] |
| Curcumin | Clinical supplementation studies | Reduction of fasting glucose, HbA1c and lipid peroxidation markers | [47] |
| Curcumin | Type 2 diabetes/metabolic syndrome patients | Improvement of glycemic and oxidative stress parameters | [48] |
| Green tea catechins (EGCG) | Green tea polyphenols | Inhibition of α-amylase and α-glucosidase; reduced carbohydrate absorption | [49] |
| Green tea catechins (EGCG) | Epigallocatechin gallate | Activation of AMPK; increased lipid oxidation; increased energy expenditure | [50] |
| Anthocyanins | Cyanidin-3-glucoside, delphinidin (berries: blueberry, blackcurrant) | Activation of AMPK; increased GLUT4 expression; improved insulin sensitivity; antioxidant activity; modulation of inflammatory pathways | [51] |
| Hydroxytyrosol | Olive oil phenolic compound | Potent antioxidant; reduction of LDL oxidation; improvement of endothelial function; anti-inflammatory effects; modulation of lipid metabolism | [52] |
| Omega-3 PUFAs | EPA and DHA (marine oils) | Regulation of lipid metabolism, inflammation and insulin sensitivity | [53] |
| Omega-3 PUFAs | Fish oil and microalgae | Incorporation into cell membranes; modulation of receptor and enzyme activity | [54] |
| Omega-3 PUFAs | EPA/DHA metabolites | Production of resolvins, protectins and maresins; active resolution of inflammation | [55] |
| Omega-3 PUFAs | Clinical supplementation studies | Reduction of plasma triglycerides; decreased hepatic steatosis; improved endothelial function | [56] |
| Omega-3 PUFAs | EPA and DHA | Activation of PPARα and PPARγ; improved fatty acid oxidation and lipid handling | [57] |
| Dietary fibers & prebiotics | β-glucans, pectins, inulin | Modulation of gut microbiota and production of SCFAs | [58] |
| Soluble fibers | Oats, fruits, chicory root | Slowed gastric emptying; improved satiety; reduced postprandial glucose | [59] |
| Short-chain fatty acids (SCFAs) | Butyrate, propionate, acetate | Activation of GPR41/GPR43; HDAC inhibition; improved insulin sensitivity | [60] |
| Butyrate | Colonic fermentation product | Enhanced gut barrier; reduced endotoxin translocation; reduced systemic inflammation | [61] |
| Synbiotics | Microencapsulation of synbiotic formulations | Improve microbial viability during food processing and gastrointestinal transit | [62, 63] |
| Prebiotics | Inulin-type fructans | Increased Bifidobacterium and Akkermansia muciniphila abundance | [64] |
| Probiotics | Lactobacillus plantarum, Lactobacillus rhamnosus, Bifidobacterium breve | Modulation of microbiota; improved lipid metabolism; reduced inflammation | [65] |
| Probiotics | Clinical and mechanistic studies | Increased SCFAs; upregulation of GLP-1; reduced circulating endotoxins | [66] |
| Probiotics | Clinical intervention trials | Improvement of inflammatory and metabolic biomarkers | [67] |
| Probiotics | Hyperlipidemic patients | Reduction of total cholesterol and LDL; increased HDL | [68] |
| Synbiotics | Combined prebiotics and probiotics | Restoration of microbial balance; improved metabolic outcomes | [69] |
| Phytosterols & stanols | Plant sterols (β-sitosterol, campesterol, stigmasterol) | Competitive inhibition of intestinal cholesterol absorption | [70] |
| Phytosterols | Fortified functional foods | Reduction of LDL cholesterol by 10–20% | [71] |
| Phytosterols | Experimental and clinical studies | Anti-inflammatory effects; reduced macrophage cholesterol accumulation | [72] |
| Bioactive peptides | Milk, soy, fish and cereal-derived peptides | Antihypertensive, antioxidant and antidiabetic activities | [73] |
| Bioactive peptides | VPP and IPP | ACE inhibition; blood pressure reduction; improved endothelial function | [74] |
| Milk-derived peptides | Bovine casein peptides | Activation of PI3K–Akt; increased glucose uptake; enhanced insulin secretion | [75] |