Kirkland Signature Super B-Complex with Electrolytes 500 Tablets
Kirkland SignatureAnalysis updated September 2026 · How Scout scores
Near you
Kirkland Signature is carried at Costco stores. Find one within 25 miles.
At a glance
Summary
This supplement contains a range of beneficial B vitamins and electrolytes, which are essential for energy metabolism and maintaining fluid balance. However, it includes several additives such as cellulose, silicon dioxide, and magnesium stearate, which contribute to its processing level. While these additives are common in supplements, they slightly detract from the overall formulation quality.
Key ingredients 19
Thiamin MononitrateVery Good
Thiamin mononitrate is a stable form of vitamin B1, essential for energy metabolism and nerve function. It supports carbohydrate metabolism and is crucial for heart and brain health. In supplements, it helps prevent thiamin deficiency.
Benefits
Supports energy metabolism and nerve function, preventing deficiency.
d-Calcium PantothenateVery Good
d-Calcium pantothenate is a stable form of vitamin B5, essential for synthesizing coenzyme A and energy production. It supports adrenal function and helps convert food into energy. In supplements, it aids in reducing stress and improving skin health.
Benefits
Supports energy production and adrenal function, improving skin health.
d-BiotinVery Good
d-Biotin, or vitamin B7, is essential for carbohydrate and fat metabolism. It supports healthy hair, skin, and nails. In supplements, it helps improve hair and nail strength and supports metabolic function.
Benefits
Supports healthy hair, skin, and nails, improving metabolic function.
CyanocobalaminVery Good
Cyanocobalamin is a synthetic form of vitamin B12, essential for nerve function and red blood cell formation. It supports energy production and DNA synthesis. In supplements, it helps prevent B12 deficiency and supports neurological health.
Benefits
Supports nerve function and red blood cell formation, preventing deficiency.
Sodium ChlorideGood
Sodium chloride is essential for maintaining fluid balance and nerve function. It is a key electrolyte that supports hydration and muscle function. In supplements, it helps replenish sodium lost through sweat.
Risks
Excessive intake can lead to high blood pressure and cardiovascular issues.
Benefits
Helps maintain proper hydration and supports nerve and muscle function.
Ascorbic AcidGood
Ascorbic acid, or vitamin C, is a powerful antioxidant that supports immune function and skin health. It is crucial for collagen synthesis and helps protect cells from oxidative damage. In supplements, it enhances iron absorption and boosts immunity.
Risks
High doses may cause gastrointestinal discomfort or kidney stones.
Benefits
Supports immune function, enhances iron absorption, and promotes healthy skin.
Potassium ChlorideGood
Potassium chloride is an important electrolyte that helps maintain fluid balance and supports muscle and nerve function. It is used in supplements to replenish potassium levels, especially after exercise. It aids in reducing blood pressure and preventing muscle cramps.
Risks
Excessive intake can lead to hyperkalemia, affecting heart function.
Benefits
Supports muscle and nerve function, helps maintain fluid balance.
NiacinamideGood
Niacinamide is a form of vitamin B3 that supports energy metabolism and skin health. It helps convert food into energy and is essential for DNA repair. In supplements, it aids in reducing cholesterol levels and improving skin conditions.
Risks
High doses may cause liver damage or gastrointestinal issues.
Benefits
Supports energy metabolism, improves skin health, and reduces cholesterol.
RiboflavinGood
Riboflavin, or vitamin B2, is essential for energy production and cellular function. It supports the metabolism of fats, drugs, and steroids. In supplements, it helps prevent riboflavin deficiency and supports overall health.
Benefits
Supports energy production and prevents riboflavin deficiency.
Pyridoxine HydrochlorideGood
Pyridoxine hydrochloride is a form of vitamin B6, crucial for protein metabolism and neurotransmitter synthesis. It supports brain health and immune function. In supplements, it helps reduce symptoms of PMS and improve mood.
Risks
High doses may cause nerve damage or sensory neuropathy.
Benefits
Supports brain health and protein metabolism, improving mood.
CelluloseNeutral
Cellulose is a plant-derived fiber used as a binder or filler in supplements. It is generally considered safe and non-digestible, providing no nutritional value. It helps maintain tablet structure without affecting health.
See more about Cellulose →Dicalcium PhosphateNeutral
Dicalcium phosphate is a source of calcium and phosphorus, used as a dietary supplement and tablet binder. It supports bone health but is primarily used for its binding properties in tablets. It is generally considered safe in moderate amounts.
Risks
Excessive intake may lead to imbalances in calcium and phosphorus levels.
Benefits
Provides calcium and phosphorus, supporting bone health.
Croscarmellose SodiumNeutral
Croscarmellose sodium is a disintegrant used in tablets to help them dissolve quickly. It is derived from cellulose and is considered safe for consumption. It ensures the effective release of active ingredients in supplements.
Benefits
Ensures effective release of active ingredients in supplements.
Silicon DioxideNeutral
Silicon dioxide is used as an anti-caking agent in supplements to prevent clumping. It is naturally occurring and considered safe for consumption. It does not provide nutritional benefits but ensures product stability.
See more about Silicon Dioxide →MannitolNeutral
Mannitol is a sugar alcohol used as a sweetener and stabilizer in supplements. It is low in calories and has a minimal impact on blood sugar levels. It is generally safe but may cause digestive issues in large amounts.
Risks
May cause digestive issues like bloating or diarrhea in large amounts.
Benefits
Provides sweetness with minimal impact on blood sugar levels.
Magnesium StearateNeutral
Magnesium stearate is used as a lubricant in supplement manufacturing to prevent ingredients from sticking to equipment. It is considered safe in small amounts but provides no nutritional benefits. It ensures smooth production of tablets.
See more about Magnesium Stearate →Cellulose CoatingNeutral
Cellulose coating is used to protect tablets and ensure their stability. It is derived from plant fibers and is considered safe for consumption. It does not provide nutritional benefits but enhances tablet durability.
See more about Cellulose Coating →Folic AcidNeutral
Standard formulation ingredient — neither beneficial nor harmful at typical use.
Risks
Excessive intake may mask vitamin B12 deficiency symptoms.
Benefits
Supports DNA synthesis and prevents neural tube defects.
Carnauba WaxNeutral
Carnauba wax is used as a coating agent in supplements to provide a glossy finish. It is derived from the leaves of the carnauba palm and is considered safe for consumption. It does not provide nutritional benefits but enhances product appearance.
See more about Carnauba Wax →Processing
Ultra-Processed Foods
Get the full breakdown in the Scout appTake Scout shopping
Scan any product to see lab results, healthy alternatives, and your personalized analysis.
Download on theApp Store GET IT ONGoogle PlayAmazon pricing & content
Amazon price as of . Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.
CERTAIN CONTENT THAT APPEARS ON THIS SITE COMES FROM AMAZON. THIS CONTENT IS PROVIDED “AS IS” AND IS SUBJECT TO CHANGE OR REMOVAL AT ANY TIME.