Serving Size:
2 Capsules
Amount Per Serving:
Vitamin C (as ascorbic acid, calcium ascorbate, potassium ascorbate complex, and magnesium ascorbate complex) ... 1,200 mg
Calcium (as calcium carbonate, calcium ascorbate) ... 80 mg
Magnesium (as magnesium carbonate, magnesium ascorbate complex) ... 54 mg
Zinc (as zinc citrate) ... 6.4 mg
Copper (as Albion® copper bisglycinate chelate‡) ... 0.46 mg
Manganese (as Albion® manganese bisglycinate chelate‡) ... 1 mg
Potassium (as potassium ascorbate complex) ... 20 mg
Quercetin (as quercetin dihydrate)(from Japanese pagoda tree (Sophora japonica) flower extract) ... 60 mg
L-Glutathione (reduced form) ... 11.8 mg
Other Ingredients:
Vegetarian capsule (hydroxypropyl methylcellulose, water), microcrystalline cellulose, L-leucine, and L-valine.
Made without common allergens | Non-GMO | Vegan
No synthetic colors, flavors, or preservatives
CAUTION: Consult with your physician if you are pregnant or nursing, or have any medical condition, or taking prescription drugs, or under the age of 18 years.
KEEP OUT OF REACH OF CHILDREN
Take 2 capsules, 1 to 2 times daily or as directed by a healthcare professional.
Open original label
Source: Fullscript supplier catalog · September 06, 2026. Formulas and labels can change. Check the packaging you receive.
Multi-Element Buffered C from Klaire Labs/SFI Health is a buffered vitamin C formula combining ascorbic acid with calcium, magnesium, and potassium ascorbates to support immune function, antioxidant activity, and connective tissue integrity. The buffered form is gentler on the GI tract than standard ascorbic acid, making it suitable for sensitive individuals or those taking higher doses.
Why It's Worth Considering: Klaire Labs formulates to practitioner-grade standards with careful attention to excipient minimization, a meaningful distinction for clinically sensitive populations, including those with complex GI concerns or multiple sensitivities.
Take 2 capsules, 1 to 2 times daily or as directed by a healthcare professional.
| Feature | Ascorbic Acid | Buffered (Ascorbate) | Liposomal | Ester-C |
|---|---|---|---|---|
| Bioavailability | Good (standard) | Good (gentler) | Excellent (2-3x) | Good |
| GI Tolerance | May cause acidity | Very gentle | Excellent | Gentle |
| Best For | Budget, general use | Sensitive stomachs | Maximum absorption | Sustained release |
| Price | $ | $ | $$$ | $$ |
For maintenance, 500-1000mg daily is sufficient. For immune support during illness, 2000-4000mg in divided doses. The body can only absorb ~200-500mg at once, so split large doses throughout the day. Liposomal forms bypass this limit with 2-3x better absorption.
For most people, standard ascorbic acid at 500-1000mg is sufficient. Liposomal vitamin C is worth the premium if you need higher therapeutic doses (2000mg+) without GI distress, or if you have absorption issues. Studies show liposomal C achieves 2-3x higher blood levels than standard forms.
Vitamin C is water-soluble and excess is excreted in urine. The main risk of high doses (3000mg+) is GI distress (diarrhea, cramping) and increased oxalate production, which may contribute to kidney stones in susceptible individuals. The 'bowel tolerance' test, increasing dose until loose stools, then backing off, is a common practitioner approach.
Meta-analyses show regular vitamin C supplementation reduces cold duration by 8% in adults and 14% in children, and reduces severity. It does NOT prevent colds in most people, but it does in those under physical stress (athletes, military). Taking vitamin C after cold symptoms start has minimal benefit, daily prevention is key.
Take with food to reduce potential stomach acidity. Morning dosing is common since vitamin C may mildly increase alertness. If taking large doses (1000mg+), split into 2-3 doses throughout the day for better absorption and sustained blood levels.
Apotheca is analyzing ingredient interactions, stacking compatibility, and timing recommendations for Klaire Labs/SFI Health - Multi-Element Buffered C. This data will be available soon.
† These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
