Immune Support

Vitamin D3 is the sunshine vitamin your body depends on for immune strength, bone health, mood, and healthy hormone function — yet most people run low, especially in winter. Available in a range of strengths (2,000–25,000 IU) plus a chewable, so you can match the dose to your needs.

People cannot believe how well this one works through their toughest season. Allergy Support is a natural, non-drowsy way to help your body keep a healthy histamine response. 800 mg of quercetin phytosome, stinging nettle leaf, NAC, rosemary and bromelain work together to support sinus and nasal comfort and immune balance.

What’s inside (per 3 capsules)

• Quercetin phytosome (Quercefit, with sunflower lecithin), 800 mg
• Stinging nettle leaf extract (20:1), 750 mg
• NAC (N-acetyl L-cysteine), 200 mg
• Rosemary (5% rosmarinic acid), 150 mg
• Bromelain, 50 mg (180 MCU)
• Other ingredients: vegetarian capsule (hypromellose, purified water), microcrystalline cellulose, vegetarian magnesium stearate

Why a phytosome

Quercetin on its own is poorly absorbed. Quercefit binds it to sunflower lecithin, a form designed for much better uptake.

Common questions

How do I take it?
3 capsules daily, or as directed by your healthcare practitioner. Many people start a few weeks before their tough season.

Can I take it with my allergy medication?
Many people take it alongside their usual routine, and some find they reach for their medication less often. Talk to your practitioner before changing or stopping any medication.

How long does a bottle last?
60 capsules, 20 days at the full 3-capsule serving.

Formulated by practitioners, including Stephanie Grutz, ARNP, FNP-C. Made in an FDA-inspected, cGMP-compliant facility and third-party tested for identity, purity and potency.

This Vitamin C supplement provides a high-dose, water-soluble antioxidant essential for immune support, tissue repair, and overall health. Vitamin C supports collagen production, helps protect against oxidative stress, and contributes to healthy immune function year-round.

N-Acetyl Cysteine (NAC) is a powerful antioxidant precursor that supports the body's production of glutathione, its master antioxidant. NAC is widely used to support respiratory health, liver detoxification, and overall cellular defense against oxidative stress.

This Zinc formula from Select Balance features two highly bioavailable forms designed for superior absorption and retention. Zinc Bisglycinate supports optimal uptake in the body, while Zinc Arginate has been shown to absorb more effectively into the prostate and support hormonal balance. Manufactured in a US FDA-inspected, GMP-compliant facility using high-quality raw materials.

An easy, great-tasting way to get your vitamin C. Each chewable tablet has 500 mg of vitamin C with natural orange, tangerine and pineapple flavor. Vitamin C is an antioxidant that supports healthy immune function, collagen formation for skin and joints, and iron absorption.

What’s inside (per tablet)

• Vitamin C, 500 mg (556% DV) as sodium ascorbate and ascorbic acid
• 90 tablets per bottle
• Other ingredients: fructose, sorbitol, cellulose, vegetable stearin, silica, natural orange flavor, orange juice crystals, magnesium stearate, natural tangerine and pineapple flavors

Common questions

How do I take it?
Chew 1 tablet daily with food, or as recommended by your health practitioner.

Does it contain sugar?
It is sweetened with fructose and sorbitol, a small amount per tablet.

Want more vitamin C per serving?
Vitamin C Powder is a higher-potency option you can mix into water or juice.

Formulated by practitioners, including Stephanie Grutz, ARNP, FNP-C. Made in an FDA-inspected, cGMP-compliant facility and third-party tested for identity, purity and potency.

When your protocol calls for serious botanical support, this is the formula practitioners reach for. We've combined the most respected cleansing herbs in nature - neem leaf, olive leaf, wormwood, artemisia, clove, black walnut, and berberine from Berberis - at professional concentrations you won't find in retail products.

These botanicals have been used for centuries to support the body's natural ability to maintain healthy microbial balance, defend its internal terrain, and keep gut flora in check. A go-to choice for practitioner-guided cleanse and gut-restoration protocols. 

2,000 mg of vitamin C in one scoop, plus the nutrients that help your body put it to work. Glycine and lysine are building blocks your body pairs with vitamin C to make collagen for skin, joints and blood vessels. NAC supports your body’s own glutathione production for antioxidant defense. Chelated calcium, magnesium and potassium round it out. Together they support healthy immune function, collagen formation and energy. No sugar, no flavors, no fillers. Other ingredients: NONE.

What’s inside (per scoop, 4.02 g)

• Vitamin C (as ascorbic acid), 2,000 mg
• Niacin (as niacinamide, vitamin B3), 25 mg
• Calcium (as Albion TRAACS calcium bisglycinate chelate), 50 mg
• Magnesium (as Albion TRAACS magnesium bisglycinate chelate), 50 mg
• Potassium (as Albion potassium glycinate complex), 25 mg
• L-glycine, 625 mg
• L-lysine, 115 mg
• N-acetyl cysteine (NAC), 100 mg
• 60 servings per jar
• Other ingredients: none

Vitamin C flush (ascorbate calibration)

A vitamin C flush shows how much vitamin C your body can use right now. Do it with your practitioner’s guidance, first thing in the morning on an empty stomach, on a day you can stay home.

1. Pick your starting amount. Generally healthy: 3/4 scoop (1.5 g vitamin C). Moderately healthy: 1 1/2 scoops (3 g). Not feeling well: 3 scoops (6 g).
2. Stir it into 1 to 2 oz of room-temperature water or diluted juice. Repeat every 15 minutes and keep a running total. Drink plenty of water.
3. No gurgling or rumbling after 4 doses? Double your amount and keep going every 15 minutes.
4. Keep going until you have a watery, enema-like flush. Loose stool is NOT the endpoint.
5. Add up your total. Your daily amount is up to 75% of it, split into 2 to 4 doses. Example: 20 g total means up to 15 g a day.
6. Repeat as your practitioner recommends (weekly is common while you dial in). A flush total of 4 g or less is considered a healthy result.

Before you flush: talk to your practitioner first if you have a history of kidney stones or kidney disease, G6PD deficiency, iron overload (hemochromatosis), IBS or IBD, or you’re pregnant. Don’t stop high amounts suddenly; taper down over several days.

Common questions

How do I take it?
1/2 to 1 scoop per day in liquid, with meals, or as recommended by your practitioner.

How long does a jar last?
60 days at 1 scoop a day, up to 120 days at a half scoop.

What does it taste like?
No flavor is added. Customers mix it into water and other drinks without noticing a strong citrus taste.

How is it different from the Vitamin C Chewable?
The chewable is 500 mg with fruit flavor, for an easy daily dose. The powder is 2,000 mg with nothing added, plus glycine, lysine, NAC and minerals, for when you want more per serving.

Is it free of common allergens?
No added sugar, starch, preservatives, artificial colors, flavors, wheat, yeast, soy or dairy.

Formulated by practitioners, including Stephanie Grutz, ARNP, FNP-C. Made in an FDA-inspected, cGMP-compliant facility and third-party tested for identity, purity and potency.