Immune Health Supplements: Reviews by Dr. Bell

Immune health is more nuanced than "boost the immune system." A balanced immune system is what you want — one that responds quickly when there is a real threat, and stays quiet when there is not. Both ends of the spectrum cause problems. Underactive immunity means more colds, more infections, slower recovery. Overactive immunity means autoimmunity, allergies, and chronic inflammation.

Most immune supplements do one of three things: provide raw materials the immune system needs (vitamin C, zinc, vitamin D, vitamin A), support the gut where about 70 percent of immune cells live, or modulate the immune response with mushroom extracts, herbs, or amino acids. The right pick depends on whether you are trying to prevent, knock down an active infection, or rebuild after one.

This page collects every Designs for Health immune support product I have reviewed — what it is for, when to use it, how to dose it, and who should be careful. Most of these are best used at the first sign of getting sick rather than year-round, but a few are foundational and worth taking daily. Always check with a healthcare provider before starting an immune supplement, especially if you have an autoimmune condition or take immunosuppressive medication.

Featured Reviews

Reviews in this category are being added as Dr. Bell publishes them. Check back soon, or browse the full review library on the homepage.

• Allicillin — An enteric-coated garlic concentrate (Garlicillin) rich in garlic sulfides and stable ajoene — the active compounds most garlic pills lose, for immune and cardiovascular support with minimal odor.
• C+BioFizz — Effervescent vitamin C with zinc, quercetin, and citrus bioflavonoids — for fast-onset immune support at the start of a cold, daily winter use, and family-friendly allergy relief.
• Ginger-Tussin Organic Syrup — A clean, certified-organic syrup of ginger, lovage, and wild cherry bark in an organic honey-and-glycerin base — soothes the scratchy, ticklish throat of a seasonal cold (never for infants under one).
• HistaEze — A non-drowsy allergy blend with quercetin, nettle leaf, vitamin C, and bromelain — calms histamine from upstream.
• IgGI Shield — Purified, dairy-free serum-derived immunoglobulins (IgG) plus N-acetyl-glucosamine that bind toxins and reinforce the gut barrier — immune support right where the gut and immune system meet (beef-derived).
• Immunitone Plus — A multi-herb immune blend with echinacea, andrographis, astragalus, and elderberry — for seasonal immune support.
• ImmunoMod-A — Curcumin C3 Complex, ParActin andrographis, and N-acetyl-glucosamine that support balanced NF-kB signaling and a calm, well-regulated immune response — vegan, and built for balance rather than blunt stimulation (caution with autoimmune conditions).
• L-Lysine — Free-form L-lysine (1,500 mg) — low-risk support for people prone to recurring cold sores, plus a role in collagen and immune health.
• Liposomal Cat's Claw Synergy — Cat's claw with monolaurin, lemon balm, and 1,000 IU vitamin D in a sunflower-phospholipid liposomal liquid — well-absorbed botanical immune support without swallowing capsules (contains a little ethanol).
• Liposomal Vitamin C — Liposome-encapsulated vitamin C (around 1,000 mg) — higher absorption without the stomach upset of high-dose tablets, for immune health, collagen, and antioxidant defense.
• Monolaurin-Avail — Monolaurin (glycerol monolaurate) from the same fat in coconut, with vitamin C and lecithin for absorption — for immune and microbial-balance support.
• MycoSupreme — Eight whole immune mushrooms standardized to 160 mg of beta-glucans, plus ergothioneine — transparent, balanced immune and cellular support that states the active dose most mushroom products hide.
• Oil of Oregano — Concentrated oregano oil standardized to 60-75% carvacrol and emulsified in olive oil — short-term botanical support for gut microbial balance and immune resilience, handy for travel.
• Olive Leaf Extract — 500 mg of olive leaf standardized to 20% oleuropein, roughly 100 mg of the active polyphenol per capsule — daily immune and antioxidant support, especially through cold-and-flu season.
• Organic ImmunoBerry Liquid — Organic elderberry with astragalus, wild cherry, and maitake and shiitake mushrooms in a pleasant, no-added-sugar liquid — gentle daily immune support that even pill-averse kids will take.
• Periobiotic Silver Toothpaste — Fluoride-free toothpaste with colloidal silver, xylitol, and CoQ10 — for bleeding gums, canker sores, and mouth irritation.
• Periommune — An oral immune lozenge pairing 250 mg Wellmune beta-glucan with 50 mg Immuno-LP20 postbiotic — supports a healthy immune response right in the mouth, gums, and nasopharynx, where germs first land.
• Quercetin + Nettles — Quercetin, stinging nettles, bromelain, and vitamin C — for seasonal allergies, histamine intolerance, sinus pressure, and allergic skin reactions.
• Silvercillin Liquid — A modern 15 ppm silver-sol liquid (75 mcg purified silver per teaspoon) that doesn't build up in the body — a clean, portable, occasional tool for immune and GI support during travel and seasonal stress.
• Silvercillin Spray — A clean 15 ppm purified-silver spray using stable Silver Sol technology — a versatile cabinet staple for minor surface support on scrapes, irritated skin, and a scratchy throat.
• Stellar C — Vitamin C with quercetin, hesperidin, citrus bioflavonoids, and rutin — for immune support during cold and flu season, allergy relief, and capillary health.
• UT Synergy — A real 500 mg dose of D-mannose, which keeps bacteria from sticking to the bladder wall, surrounded by traditional flushing and soothing herbs — bearberry, hibiscus, nettle, and horsetail — for everyday urinary tract support (not a treatment for an active infection).
• Zinc Supreme — 30mg zinc bisglycinate + malate with taurine and B6 — for frequent infections, slow wound healing, adult acne, and immune support.