Immune Support
Heading into cold season, or just want to give your defenses a hand? Vitamin C, vitamin D, zinc, elderberry, quercetin, NAC, and immune health formulas.
Vitamin D3
Bone health, immune function, mood regulation, calcium absorption
Zinc
Immune function, wound healing, DNA synthesis, and reproductive health - supported by decades of clinical evidence
Vitamin C
Supports immune function, reduces common cold duration, acts as a potent antioxidant, and enhances non-heme iron absorption.
Elderberry
Reduces the duration and severity of cold and flu symptoms when taken at the onset of illness.
Quercetin
Anti-inflammatory flavonoid with moderate evidence for blood pressure reduction, allergy symptom relief, and upper respiratory infection reduction in athletes.
N-Acetyl Cysteine (NAC)
Replenishes intracellular glutathione, acts as a mucolytic agent, and serves as the standard treatment for acetaminophen overdose. Also studied for respiratory conditions, psychiatric disorders, and oxidative stress.
Astaxanthin
Skin photoprotection, eye fatigue, oxidative stress
Resveratrol
Modest improvements in insulin sensitivity, endothelial function, and systolic blood pressure in metabolic and cardiovascular populations
Garlic Extract
Modest blood pressure reduction in hypertensives, small LDL cholesterol drop, mild antiplatelet effect, possible cold-frequency reduction
Spirulina
Modest improvements in lipid panel, blood pressure, exercise endurance, and inflammatory markers from a nutrient-dense microalgae
Chlorella
Modest LDL and blood pressure support, mucosal immune (sIgA) signal in athletes
Moringa
Whole-leaf nutrient density, with early signals for blood glucose, lipids, and inflammation in small RCTs
Olive Leaf Extract
Mild blood pressure reduction, modest triglyceride and LDL improvements, antioxidant support
Echinacea
Modestly reduces the odds and duration of upper respiratory infections, mostly when taken at first symptoms with the right species and preparation.
Cordyceps
Aerobic capacity and exercise tolerance, immune modulation, anti-fatigue support
Reishi Mushroom
Immune modulation and adaptogenic support; modest evidence for cancer-adjuvant immune markers, fatigue, and quality of life
Chaga Mushroom
Antioxidant support and traditional immune use, with thin human evidence and a real oxalate kidney concern
Sulforaphane
Activation of the Nrf2 antioxidant defense pathway and phase II detoxification enzymes
Palmitoylethanolamide (PEA)
Studied for nerve discomfort, low back pain with sciatic involvement, and general pain comfort via PPAR-alpha activation and modulation of mast cell and glial cell signaling.
Glutathione
Marketed as the body's master antioxidant for immune support, detoxification, and skin brightening. Oral bioavailability is the central problem and most downstream claims are weak or unproven.
D-Mannose
Studied for urinary tract function support in women with a history of recurrent uncomplicated UTIs, with biologically plausible anti-adhesion mechanism but mixed and recently more negative trial evidence
Holy Basil (Tulsi)
Stress response support, mood balance, and sleep quality through Ayurvedic adaptogen pathways; secondary signal for blood-glucose regulation
Bromelain
Supports post-surgical recovery, post-exercise soreness, sinus and nasal comfort, and supplemental joint comfort in osteoarthritis adjunct use
Marshmallow Root
Traditional demulcent that coats irritated throat and digestive mucous membranes; supports throat comfort during dry cough and oral/pharyngeal irritation.
Cranberry (PAC-Standardized)
Studied for urinary tract health support, particularly the reduction of recurrent UTIs in women, children, and patients after bladder procedures, when standardized to deliver around 36mg of A-type proanthocyanidins (PACs) per day
Astragalus
Traditional immune and qi tonic with a long Chinese herbal history; modern human RCT evidence is limited and most positive trials are chemotherapy or kidney-disease adjuncts, not stand-alone immune support in healthy adults.
Stinging Nettle
Nettle root supports normal prostate function and urinary flow in older men with BPH-related symptoms; nettle leaf (a separate plant part) supports a normal allergy response in adults with seasonal allergic rhinitis.
Black Seed Oil (Nigella sativa, thymoquinone-containing)
Supports normal lipid balance, blood pressure within the normal range, glycemic markers, and modest weight management; thymoquinone is the studied bioactive
FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. The products discussed on this page are not intended to diagnose, treat, cure, or prevent any disease. Always consult with a qualified healthcare professional before starting any supplement regimen.