Ingredient Guides
Evidence-based guides to 55 vitamins, minerals, herbs, and nootropics across 15 categories. Every ingredient is rated for evidence strength, dosed, and checked for drug and supplement interactions.
Try our free Ingredient Dose Checker tool → Add two or more of the ingredients below to see the RDA, UL, or common studied dose for each one, plus a flag if you may be double-dosing.
See every ingredient\u2019s Evidence Grade (A/B/C) at a glance →
Vitamins
Browse all Vitamins guides →Vitamin D3
The sunshine vitamin your immune system depends on
Vitamin B12
Critical for nerve health and red blood cells
Vitamin C
Shortens colds, doesn’t prevent them
Folate (Vitamin B9)
Essential for cell division and neural development
Vitamin B6 (Pyridoxine)
Neurotransmitter co-factor for mood and hormones
Vitamin A
Vision and immune defense, toxic in excess
Vitamin K2
Directs calcium to bone instead of arteries
Biotin (Vitamin B7)
Effective only for true deficiency
Minerals
Browse all Minerals guides →Magnesium
Strong evidence for sleep, blood pressure, and migraine
Zinc
Immune, wound-healing, and taste mineral
Iron
Corrects deficiency anemia and fatigue
Calcium
Bone-building, more nuanced than you think
Selenium
Thyroid support, narrow safety margin
Iodine
The thyroid mineral, essential for metabolism
Antioxidants
Browse all Antioxidants guides →CoQ10 (Coenzyme Q10)
The mitochondrial spark plug for energy and heart
Turmeric / Curcumin
Nature’s most-studied anti-inflammatory compound
Alpha-Lipoic Acid (ALA)
Recycles vitamin C and E, used for nerve pain
NAC (N-Acetyl Cysteine)
Glutathione precursor for detox and lung health
Green Tea Extract (EGCG)
Strong antioxidant, concentrated doses need care
Resveratrol
The red-wine longevity compound
Astaxanthin
The algae antioxidant for skin and eye strain
Milk Thistle
The go-to liver herb, evidence is mixed
Nootropics
Browse all Nootropics guides →L-Theanine
Calm focus without sedation
Ginkgo Biloba
For circulation, memory, and cognitive longevity
Magnesium L-Threonate
The magnesium form shown to raise brain levels
Lion’s Mane Mushroom
The nerve-growth-factor mushroom for focus
Choline & Alpha-GPC
Essential brain nutrient with a stroke-risk nuance
Metabolic Health
Browse all Metabolic Health guides →Berberine
Rivals metformin for blood sugar control
Chromium
Insulin-sensitizing trace mineral
Apple Cider Vinegar
Real blood-sugar science, shakier weight-loss hype
NMN & Nicotinamide Riboside
2026’s top NAD+ longevity trend, honestly assessed
L-Carnitine
Fat-shuttling amino acid, modest, not miraculous
Gut Health
Browse all Gut Health guides →Psyllium Husk
FDA-recognized fiber for cholesterol and regularity
Probiotics
Live cultures that restore gut microbiome balance
L-Glutamine
The gut-healing amino acid for barrier integrity
Digestive Enzymes
Strong for lactose intolerance, weaker for bloating
Bovine Colostrum
Trending gut-and-immunity supplement
Adaptogenic Herbs
Browse all Adaptogenic Herbs guides →Immune Support
Browse all Immune Support guides →Joint & Skin Health
Browse all Joint & Skin Health guides →Sleep & Recovery
Browse all Sleep & Recovery guides →Sports & Performance
Browse all Sports & Performance guides →Hormones
Browse all Hormones guides →DHEA
The adrenal hormone that declines sharply with age
Shilajit
One trial found a real T boost, but sourcing purity matters most
Fadogia Agrestis
Zero human trials; animal data only, with real liver-safety caution
Tongkat Ali
The best-evidenced natural testosterone herb, backed by a meta-analysis
Myo-Inositol
Studied for insulin sensitivity and ovulation support in PCOS
Essential Fatty Acids
Browse all Essential Fatty Acids guides →Anti-Inflammatory
Browse all Anti-Inflammatory guides →These statements have not been evaluated by the Food and Drug Administration. This content is not intended to diagnose, treat, cure, or prevent any disease and is not a substitute for advice from your doctor or pharmacist.