B100 Complex

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Common questions

Is B100 Complex healthy?

B100 Complex scores 68/100 on Scout's independent analysis of ingredients, additives, and lab results — a fair-to-good score — solid, with tradeoffs. This B100 Complex supplement contains a range of essential B vitamins that are beneficial for energy metabolism, nerve function, and overall health.

How processed is B100 Complex?

B100 Complex is NOVA Group 4: Ultra-Processed Foods.

Which ingredients drive B100 Complex's score?

In Scout's ingredient-by-ingredient analysis, Thiamine, Riboflavin, Niacinamide count in its favor; Vegetable Grade Magnesium Stearate is flagged as an ingredient of concern. The full breakdown, with why each one matters, is in the Key ingredients section on this page.

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B100 Complex

Kirkland Signature
68 Fair

Analysis updated September 2026 · How Scout scores

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Near you

Kirkland Signature is carried at Costco stores. Find one within 25 miles.

At a glance

Beneficial ingredients 7
Harmful ingredients 1
Owned by Costco
Category Vitamins and Minerals
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

Thiamine
Very 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 B6
Very 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.

See more about Vitamin B6 →
Pantothenic Acid
Very 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.

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Riboflavin
Good

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.

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Niacinamide
Good

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.

See more about Niacinamide →
Vitamin B12
Good

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.

See more about Vitamin B12 →
Biotin
Good

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.

See more about Biotin →
Folic Acid
Neutral

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.

See more about Folic Acid →
Microcrystalline Cellulose
Neutral

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 Dihydrate
Neutral

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 Sodium
Neutral

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 →
Coating
Neutral

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 Stearate
Bad

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

Group 4 · Ultra-processed

Ultra-Processed Foods

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