Vitamin D3 is a fat-soluble vitamin produced in the skin upon exposure to UVB sunlight. It plays a critical role in calcium absorption, bone health, immune regulation, and mood stabilization. Deficiency is extremely common, especially in northern latitudes.

Vitamin C is a water-soluble antioxidant essential for collagen synthesis, immune function, and iron absorption. Humans cannot synthesize it and must obtain it from diet or supplementation.

Vitamin B12 is essential for red blood cell formation, neurological function, and DNA synthesis. It is only found naturally in animal products, making supplementation critical for vegans and vegetarians.

Vitamin K2 activates proteins that direct calcium into bones and teeth, and away from soft tissues like arteries. It is critical for bone and cardiovascular health, and is commonly under-consumed in Western diets.

Magnesium is involved in over 600 enzymatic reactions in the body. It supports muscle and nerve function, energy production, blood sugar control, and sleep quality. An estimated 50% of the population is deficient.

Zinc is an essential trace mineral involved in immune function, protein synthesis, wound healing, DNA synthesis, and cell division. It supports over 300 enzymes and is crucial for testosterone production and thyroid function.

Iron is essential for oxygen transport in hemoglobin, energy metabolism, and DNA synthesis. Iron deficiency is the most common nutritional deficiency worldwide, particularly affecting women, vegans, and endurance athletes.

Omega-3 fatty acids (EPA and DHA) are essential fats critical for brain function, cardiovascular health, and controlling inflammation. Most people consume far too little omega-3 relative to omega-6.

Creatine is the most well-researched sports supplement in history. It enhances high-intensity exercise performance, supports muscle growth, and emerging research shows cognitive benefits. It works by increasing phosphocreatine stores for rapid ATP regeneration.

L-Theanine is an amino acid found primarily in green tea. It promotes relaxation without drowsiness, enhances focus, and is one of the best-studied compounds for reducing anxiety while maintaining cognitive clarity.

Ashwagandha is a premier adaptogenic herb used in Ayurvedic medicine for over 3,000 years. It reduces cortisol, combats stress and anxiety, supports thyroid function, and may improve strength and testosterone levels.

CoQ10 is a vital compound found in every cell's mitochondria, essential for energy production and acting as a powerful antioxidant. Levels naturally decline with age and statin use.

Curcumin is the principal bioactive compound in turmeric, with potent anti-inflammatory and antioxidant properties. It modulates over 100 molecular targets, making it one of the most studied natural compounds for inflammation.

Rhodiola Rosea is a powerful adaptogenic herb that grows in cold, mountainous regions. It enhances physical and mental performance under stress, reduces fatigue, and supports mood regulation.

Probiotics are live beneficial microorganisms that support gut health, immune function, and the gut-brain axis. Different strains have different benefits — strain specificity matters greatly.

B-Complex vitamins are a group of eight water-soluble vitamins essential for energy metabolism, nervous system function, and red blood cell production. They work synergistically and are often depleted by stress, alcohol, and processed diets.

Vitamin A is a fat-soluble vitamin essential for vision, immune function, skin health, and cellular growth. It exists as preformed retinol (animal sources) and provitamin A carotenoids (plant sources).

Vitamin E is a fat-soluble antioxidant that protects cell membranes from oxidative damage. It supports immune function, skin health, and cardiovascular protection.

Selenium is a trace mineral essential for thyroid hormone metabolism, antioxidant defense (glutathione peroxidase), and immune function. Brazil nuts are the richest food source.

Alpha-Lipoic Acid is a unique antioxidant that works in both water and fat environments. It recycles other antioxidants (vitamins C, E, glutathione, CoQ10) and supports blood sugar regulation and nerve health.

Quercetin is a powerful flavonoid antioxidant found in many fruits and vegetables. It has anti-inflammatory, antihistamine, and antiviral properties, and acts as a zinc ionophore.

Collagen is the most abundant protein in the human body, critical for skin, joints, bones, and connective tissues. Supplementing with hydrolyzed collagen peptides provides bioactive building blocks that stimulate the body's own collagen production.

Melatonin is a hormone produced by the pineal gland that regulates the sleep-wake cycle. Supplementation is primarily used for sleep onset, jet lag, and circadian rhythm disorders. It also has antioxidant and immune-modulatory properties.

Berberine is a bioactive compound extracted from several plants including goldenseal and barberry. It activates AMPK (a metabolic master switch) and has been shown to rival metformin for blood sugar control.

Boswellia serrata extract (frankincense) is a potent anti-inflammatory that specifically inhibits 5-LOX enzyme. It is one of the most effective natural compounds for joint health and inflammatory conditions.

NAC is the supplemental form of the amino acid cysteine and is the rate-limiting precursor to glutathione, the body's master antioxidant. It supports liver detoxification, respiratory health, and mental health.

Lion's Mane is an edible medicinal mushroom studied for its ability to stimulate nerve growth factor (NGF) and brain-derived neurotrophic factor (BDNF). It is valued for cognitive support, nerve regeneration, and mood regulation.

Glycine is the smallest amino acid and a major inhibitory neurotransmitter. It is used for sleep quality, temperature regulation, glucose metabolism, and as the main structural amino acid in collagen.

Glucosamine and chondroitin are structural components of cartilage, widely used together for osteoarthritis and joint comfort. They support the cartilage matrix and reduce inflammation in joint tissue.

Lutein and zeaxanthin are carotenoids that concentrate in the macula of the retina, where they filter high-energy blue light and quench oxidative stress. Supplementation is linked to reduced risk of age-related macular degeneration and improved visual performance.

Taurine is a sulfur-containing amino acid found in high concentrations in heart, muscle, retina, and brain. It is involved in bile-salt formation, calcium signaling, electrolyte balance, and mitochondrial function. Recent longevity research has renewed interest in its anti-aging potential.

NMN is a direct precursor to NAD+, a coenzyme central to energy metabolism, DNA repair, and sirtuin activation. NAD+ levels decline with age, and NMN supplementation aims to restore them to support cellular resilience and healthspan.

Folate is a water-soluble B vitamin essential for DNA synthesis, red blood cell formation, and the methylation cycle. It is especially critical during pregnancy for preventing neural tube defects. Natural folate and synthetic folic acid differ in metabolism — individuals with MTHFR variants may benefit from the methylated form.

Psyllium husk is a soluble, gel-forming fiber from the seeds of Plantago ovata. It is one of the most evidence-backed supplements for constipation, cholesterol reduction, and glycemic control, and supports the gut microbiome as a fermentable substrate.