Alpha-lipoic acid
Alpha-Lipoic Acid (ALA)
Potent antioxidant that works in both water and fat-soluble environments. R-form is the biologically active isomer. Evidence for diabetic neuropathy and blood sugar support.
Dose: 300-600 mg/day
Supplements for Metabolic syndrome
Cluster of conditions — elevated blood sugar, abnormal cholesterol, high blood pressure, excess abdominal fat — that increase heart disease and diabetes risk.
Berberine
Berberine HCl
Alkaloid from goldenseal and barberry. Activates AMPK, same pathway as metformin. Strong evidence for blood sugar and lipid management. Sometimes called 'nature's metformin.'
Dose: 500-1500 mg/day (split doses)
Myo-inositol
Myo-Inositol
A carbocyclic sugar involved in insulin signaling and neurotransmitter function. Strong evidence for PCOS and metabolic markers. Also used for anxiety and sleep at higher doses.
Dose: 2-4 g/day
Psyllium husk
Psyllium Husk Fiber
Soluble fiber from Plantago ovata seeds. One of the most evidence-backed supplements for cholesterol and blood sugar management. FDA-approved health claim for heart disease risk reduction.
Dose: 5-10 g/day before meals
Aged garlic extract
Aged Garlic Extract (Kyolic)
Garlic aged for 20 months, converting allicin to S-allyl cysteine and other stable compounds. Better tolerated than raw garlic. Kyolic brand is the most studied. Some evidence for arterial calcification reduction.
Dose: 600-1200 mg/day
Artichoke extract
Cynara scolymus Extract
Traditional Mediterranean remedy for liver and digestive health. Contains cynarin and chlorogenic acid. Evidence for cholesterol reduction and liver enzyme improvement.
Dose: 600-1200 mg/day
Beetroot
Beetroot Extract / Nitrate
Rich source of dietary nitrate, which converts to nitric oxide. Improves blood vessel dilation, blood pressure, and exercise performance. One of the best evidence-based ergogenic supplements.
Dose: Same dosing
Beta-glucan
Beta-Glucan Fiber
Soluble fiber found in oats, barley, and yeast. Oat beta-glucan has an FDA-approved health claim for cholesterol reduction. Also modulates immune function.
Dose: 3-5 g/day
Chromium
Chromium Picolinate
Trace mineral involved in insulin signaling. Once heavily promoted for blood sugar control. More recent evidence suggests benefits are modest and mainly in deficient individuals.
Dose: 200-1000 mcg/day
Cinnamon
Cinnamomum cassia / C. verum Extract
Common spice with blood sugar-lowering properties. Ceylon (true) cinnamon preferred over cassia due to lower coumarin content. Modest evidence for fasting glucose reduction.
Dose: 1-6 g/day or 250-500 mg extract
Curcumin
Curcumin (Turmeric Extract)
Active compound in turmeric with broad anti-inflammatory and antioxidant effects. Poor bioavailability requires enhanced formulations (piperine, phytosome, nanoparticle). One of the most researched natural compounds.
Dose: 500-1000 mg/day
D-Chiro-Inositol
DCI
A stereoisomer of inositol involved in insulin signaling. Often used alongside myo-inositol in a 40:1 ratio for PCOS and metabolic support.
Dose: 50-100 mg/day (often with myo-inositol)
Fish oil
Omega-3 Fatty Acids (EPA/DHA)
Essential fatty acids the body cannot produce. EPA and DHA support cardiovascular health, reduce triglycerides, and have anti-inflammatory effects. One of the most studied supplements in existence.
Dose: 1-3 g/day
Garlic
Allicin / Garlic Extract
One of the oldest medicinal plants. Allicin is the primary active compound formed when garlic is crushed. Evidence for modest blood pressure and cholesterol reduction.
Dose: 600-1200 mg/day
Ginger
Zingiber officinale Extract
Traditional anti-nausea and anti-inflammatory remedy with modern clinical validation. Gingerols and shogaols are the active compounds. Evidence for nausea, pain, and metabolic markers.
Dose: 1-2 g/day extract
Glucomannan
Glucomannan (Konjac Root Fiber)
Water-soluble fiber from konjac root. Absorbs enormous amounts of water, promoting satiety. EU-approved weight loss claim at 3g/day. Also lowers cholesterol and blood sugar.
Dose: 1 g 3x/day before meals with water
Green tea extract
Epigallocatechin Gallate (EGCG)
Concentrated polyphenol from green tea. EGCG is the primary active catechin. Supports metabolic rate, fat oxidation, and has neuroprotective properties. Liver safety concerns at high doses.
Dose: 250-500 mg EGCG/day with food
Magnesium glycinate
Magnesium Bisglycinate Chelate
The most bioavailable form of magnesium for sleep and relaxation. Glycine itself has calming properties. US Army studies showed magnesium reduced noise-induced hearing damage. Addresses widespread deficiency — estimated 50% of Americans are magnesium deficient.
Dose: 300-400 mg elemental Mg/day
Olive polyphenols
Olive Leaf / Olive Oil Polyphenols
Polyphenols from olive leaves and extra virgin olive oil. Oleuropein and hydroxytyrosol are key active compounds. Part of the Mediterranean diet's cardioprotective mechanism.
Dose: 500-1000 mg/day
Prebiotics
Prebiotic Fiber (Inulin/FOS)
Non-digestible fibers that feed beneficial gut bacteria. Inulin and FOS are the most common. Support gut microbiome diversity and short-chain fatty acid production.
Dose: 5-10 g/day
Probiotics
Multi-Strain Probiotics
Live beneficial bacteria. Effects are highly strain-specific — different strains do different things. Gut microbiome influences virtually every organ system. Quality and strain selection matter enormously.
Dose: Strain-dependent dosing
Resveratrol
Trans-Resveratrol
Polyphenol found in red wine, grape skins, and Japanese knotweed. Activates SIRT1 and AMPK pathways. Dramatic longevity effects in animal models have not clearly translated to humans.
Dose: 150-500 mg/day
Spirulina
Arthrospira platensis
Blue-green microalgae with exceptional nutrient density. Rich in protein, B vitamins, iron, and phycocyanin (unique blue pigment with anti-inflammatory properties). One of the most nutrient-dense foods on Earth.
Dose: 1-8 g/day
Sulforaphane
Sulforaphane glucosinolate
Most potent natural activator of Nrf2 pathway — the body's master antioxidant defense system. Derived from broccoli sprouts. Upregulates hundreds of protective genes.
Dose: 10-50 mg sulforaphane/day
Synbiotics
Synbiotic Blend (Probiotic + Prebiotic)
Combination of probiotics and prebiotics in a single product. The prebiotic component feeds the probiotic strains, theoretically improving colonization and efficacy.
Dose: Product-dependent dosing
Taurine
2-aminoethanesulfonic acid
Conditionally essential amino acid abundant in brain, heart, and muscle. 2023 Science paper showed lifespan extension across multiple species. Supports GABA-ergic signaling and cardiovascular function.
Dose: 1-3 g/day
Vitamin D3
Cholecalciferol (Vitamin D3)
Fat-soluble vitamin functioning like a hormone, affecting 1,000+ genes. Widespread deficiency (40% of US adults). Critical for bone, immune, and cardiovascular health.
Dose: 1000-5000 IU/day (dose to serum level)
AKG
Alpha-Ketoglutarate
Key intermediate in the Krebs cycle. Animal studies showed significant lifespan extension. Rejuvant LifeAKG human trial suggested biological age reversal via DNA methylation clocks, but remains controversial.
Dose: 500-1000 mg/day
Ashwagandha
Withania somnifera Extract
Adaptogenic herb from Ayurvedic medicine. Reduces cortisol, supports sleep, and may improve metabolic markers. KSM-66 and Sensoril are the most-studied standardized extracts.
Dose: 300-600 mg/day
Butyrate
Sodium Butyrate / Tributyrin
Short-chain fatty acid normally produced by gut bacteria fermenting fiber. Fuels colon cells, reduces inflammation, and supports gut barrier integrity. Supplemental forms bypass the need for microbial production.
Dose: 300-600 mg tributyrin/day
Carnosine
L-Carnosine
Dipeptide found in muscle and brain. Acts as an intracellular buffer, antioxidant, and anti-glycation agent. Levels decline with age. May be supplemented directly or via beta-alanine.
Dose: 500-1000 mg/day
Cordyceps
Cordyceps militaris Extract
Medicinal mushroom traditionally used in Chinese medicine. Modern cultivated Cordyceps militaris has replaced the rare wild Cordyceps sinensis. Supports energy, exercise performance, and kidney function.
Dose: 1-3 g/day
Creatine
Creatine Monohydrate
One of the most studied supplements in existence. Beyond muscle performance, emerging evidence for cognitive function — the brain uses creatine for energy-intensive tasks. May be especially beneficial for sleep-deprived cognition.
Dose: 3-5 g/day
Glycine
Aminoacetic acid
The simplest amino acid. Building block for collagen, glutathione, creatine, and inhibitory neurotransmitters. At 3g bedtime doses, lowers core body temperature and promotes NREM sleep quality.
Dose: 3-5 g/day
Iodine
Iodine (Potassium Iodide)
Essential for thyroid hormone production. Deficiency affects cognitive development and metabolic rate. Most people in developed countries get adequate iodine from iodized salt.
Dose: 150 mcg/day
Nicotinamide riboside
Nicotinamide Riboside (NR)
Form of vitamin B3 that serves as NAD+ precursor. NAD+ levels decline with age. NR raises NAD+ effectively without niacin flushing. Whether NAD+ elevation translates to health benefits is the key question.
Dose: 300-1000 mg/day
NMN
Nicotinamide Mononucleotide
Another NAD+ precursor, popularized by David Sinclair. Debates NR vs NMN. Recent human trial from University of Washington showed improved muscle insulin sensitivity. Regulatory status has been uncertain.
Dose: 250-500 mg/day
Pomegranate extract
Punica granatum Extract
Rich source of punicalagins and ellagitannins. Gut bacteria convert these to urolithin A, which activates mitophagy. Evidence for cardiovascular and cognitive benefits.
Dose: 500-1000 mg/day
Quercetin
Quercetin phytosome
Flavonoid found in onions, apples, and berries with anti-inflammatory and senolytic properties. When combined with dasatinib, selectively clears senescent cells. Phytosome form improves poor bioavailability.
Dose: 500-1000 mg/day
How to read the scores
Relevance badges
HighDirectly studied for this condition
ModeratePlausible mechanism
LowWeak or indirect
Evidence & onset bars
Strong evidence / fast onset
Emerging / limited
Insufficient data
Safety strip
No significant concerns
Worth noting
Significant concern
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Beyond supplements
There are other evidence-based interventions studied for metabolic syndrome:
- Mediterranean diet Strongest dietary evidence for metabolic syndrome reversal. Multiple large RCTs including PREDIMED.
- Resistance training Improves insulin sensitivity independent of weight loss. Strong RCT evidence for glucose and lipid management.
- Time-restricted eating Emerging evidence for metabolic markers. Multiple small RCTs show benefit; long-term data still building.