Near you
Kirkland Signature is carried at Costco stores. Find one within 25 miles.
At a glance
Summary
This B100 Complex supplement contains a range of essential B vitamins that are beneficial for energy metabolism, nerve function, and overall health. The formulation includes microcrystalline cellulose and magnesium stearate, which are common additives in supplements but can slightly reduce the bioavailability of active ingredients. Despite these additives, the product maintains a good balance of beneficial nutrients without major harmful ingredients.
Key ingredients 13
ThiamineVery Good
Thiamine is essential for energy metabolism and nerve function. It is typically well-absorbed and supports overall health. As a water-soluble vitamin, it poses minimal risk of toxicity.
Benefits
Supports energy production and nervous system health.
Vitamin B6Very Good
Vitamin B6 is vital for protein metabolism and cognitive development. It is involved in the production of neurotransmitters and hemoglobin. It also supports immune function.
Risks
Excessive intake can lead to nerve damage, but this is rare with normal supplementation.
Benefits
Supports protein metabolism and cognitive development.
Pantothenic AcidVery Good
Pantothenic acid is vital for synthesizing coenzyme A, which is crucial for fatty acid metabolism. It supports adrenal function and energy production. It is generally well-tolerated and safe.
Benefits
Supports fatty acid metabolism and adrenal function.
RiboflavinGood
Riboflavin plays a crucial role in energy production and cellular function. It is generally well-tolerated and necessary for the metabolism of fats, drugs, and steroids. It also helps maintain healthy skin and eyes.
Benefits
Essential for energy production and maintaining healthy skin and eyes.
NiacinamideGood
Niacinamide is a form of vitamin B3 that supports skin health and energy metabolism. It is less likely to cause flushing compared to niacin. It also plays a role in DNA repair and stress responses.
Risks
High doses may cause liver damage, but typical supplement doses are safe.
Benefits
Supports skin health and energy metabolism.
Vitamin B12Good
Vitamin B12 is essential for nerve function and the production of DNA and red blood cells. It is particularly important for vegetarians and older adults who may be at risk of deficiency. It also supports energy production.
Benefits
Supports nerve function and red blood cell production.
BiotinGood
Biotin is important for carbohydrate, fat, and protein metabolism. It is often associated with improved hair, skin, and nail health. It also supports energy production.
Benefits
Supports metabolism and improves hair, skin, and nail health.
Folic AcidNeutral
Standard formulation ingredient — neither beneficial nor harmful at typical use.
Risks
High doses may mask vitamin B12 deficiency.
Benefits
Essential for DNA synthesis and preventing neural tube defects.
Microcrystalline CelluloseNeutral
Microcrystalline cellulose is used as a bulking agent and stabilizer in supplements. It is derived from plant fibers and is generally considered safe. It does not provide nutritional benefits but aids in tablet formation.
See more about Microcrystalline Cellulose →Dibasic Calcium Phosphate DihydrateNeutral
Dibasic calcium phosphate dihydrate is used as a dietary supplement and tableting agent. It provides calcium and phosphorus, which are essential for bone health. However, in this form, it primarily serves as a filler.
Risks
Excessive intake may lead to imbalances in calcium and phosphorus levels.
Benefits
Provides calcium and phosphorus, essential for bone health.
Croscarmellose SodiumNeutral
Croscarmellose sodium is used as a disintegrant in tablets to help them dissolve properly. It is generally recognized as safe and does not contribute nutritional value. It ensures the tablet breaks down efficiently in the digestive system.
See more about Croscarmellose Sodium →CoatingNeutral
The coating, made from hydroxypropyl methylcellulose and vegetable glycerin, is used to protect the tablet and aid in swallowing. It is derived from plant sources and is generally considered safe. It does not provide nutritional benefits.
Vegetable Grade Magnesium StearateBad
Magnesium stearate is used as a lubricant in tablet manufacturing. It is derived from vegetable oils and can inhibit nutrient absorption if consumed in large amounts. It is often criticized for its potential to reduce the bioavailability of active ingredients.
Risks
May inhibit nutrient absorption and reduce bioavailability of active ingredients.
Processing
Ultra-Processed Foods
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