ESN Athlete Stack

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Common questions

Is ESN Athlete Stack healthy?

ESN Athlete Stack scores 88/100 on Scout's independent analysis of ingredients, additives, and lab results — one of the stronger scores in Scout's catalog. The ESN Athlete Stack features a comprehensive blend of vitamins and minerals, utilizing highly bioavailable forms such as calcium citrate, magnesium citrate, and iron bisglycinate, which enhance absorption and minimize gastrointestinal discomfort.

How processed is ESN Athlete Stack?

ESN Athlete Stack is NOVA Group 1: Unprocessed or Minimally Processed Foods.

Which ingredients drive ESN Athlete Stack's score?

In Scout's ingredient-by-ingredient analysis, Calcium Citrate, Magnesium Citrate, Potassium Citrate count in its favor. The full breakdown, with why each one matters, is in the Key ingredients section on this page.

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ESN Athlete Stack

ESN
88 Excellent

Analysis updated September 2026 · How Scout scores

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At a glance

Beneficial ingredients 14
Harmful ingredients 0
Owned by The Quality Group
Category Creatine
Summary

The ESN Athlete Stack features a comprehensive blend of vitamins and minerals, utilizing highly bioavailable forms such as calcium citrate, magnesium citrate, and iron bisglycinate, which enhance absorption and minimize gastrointestinal discomfort. The formulation is free from artificial sweeteners, dyes, and seed oils, and includes beneficial antioxidants like vitamin E and C. The presence of anti-caking agents and a capsule shell is typical for supplements, but the overall ingredient quality and formulation integrity are high, contributing to a favorable score.

Key ingredients 15

Calcium Citrate
Good

Calcium citrate is a highly absorbable form of calcium, essential for bone health and muscle function. It is preferred over other forms due to its better absorption, especially in individuals with low stomach acid. This form of calcium does not require food for absorption, making it versatile for supplementation.

Risks

Excessive intake may lead to hypercalcemia, which can cause kidney stones and impaired absorption of other minerals.

Benefits

Supports bone density and strength, and plays a crucial role in muscle contraction and nerve signaling.

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Magnesium Citrate
Good

Magnesium citrate is a well-absorbed form of magnesium, important for muscle and nerve function, and energy production. It is often used to prevent magnesium deficiency and is known for its laxative properties. This form is more bioavailable compared to magnesium oxide.

Risks

High doses can cause diarrhea and abdominal cramping.

Benefits

Supports cardiovascular health, muscle relaxation, and energy metabolism.

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Potassium Citrate
Good

Potassium citrate is used to prevent kidney stones and maintain proper electrolyte balance. It is a bioavailable form of potassium, which is crucial for heart and muscle function. This form helps alkalize the urine, reducing the risk of stone formation.

Risks

Excessive intake can lead to hyperkalemia, which may cause heart rhythm disturbances.

Benefits

Helps maintain normal blood pressure and supports cardiovascular health.

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Vitamin E
Good

Vitamin E is a powerful antioxidant that protects cells from oxidative damage. It is essential for immune function and skin health. Mixed tocopherols provide a broader spectrum of antioxidant protection compared to alpha-tocopherol alone.

Risks

High doses may interfere with blood clotting and increase the risk of bleeding.

Benefits

Supports immune function and skin health, and protects against oxidative stress.

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Vitamin C
Good

Vitamin C is a potent antioxidant that supports immune function and collagen synthesis. Ascorbic acid is the pure form of vitamin C, known for its role in enhancing iron absorption. It is water-soluble and must be consumed regularly as the body does not store it.

Risks

High doses can cause gastrointestinal disturbances such as diarrhea.

Benefits

Boosts immune function, enhances iron absorption, and supports skin health through collagen production.

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Iron Bisglycinate
Good

Iron bisglycinate is a highly absorbable form of iron, used to prevent and treat iron deficiency anemia. It is gentle on the stomach compared to other forms of iron. This chelated form reduces the risk of gastrointestinal side effects.

Risks

Excessive iron intake can lead to toxicity, causing organ damage.

Benefits

Supports oxygen transport in the blood and is essential for energy production.

Zinc Bisglycinate
Good

Zinc bisglycinate is a chelated form of zinc, known for its high bioavailability and absorption. It supports immune function, wound healing, and DNA synthesis. This form minimizes gastrointestinal discomfort compared to zinc sulfate.

Risks

Excessive zinc intake can interfere with copper absorption and cause immune dysfunction.

Benefits

Enhances immune response, supports skin health, and aids in cellular repair.

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Niacin
Good

Niacin, also known as vitamin B3, is essential for energy metabolism and DNA repair. Nicotinamide is a form that does not cause flushing, unlike nicotinic acid. It plays a role in maintaining healthy skin and nerves.

Risks

High doses can cause liver damage and gastrointestinal issues.

Benefits

Supports energy production and helps maintain healthy skin and nervous system.

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Pantothenic Acid
Good

Pantothenic acid, or vitamin B5, is essential for synthesizing coenzyme A, which is critical for fatty acid metabolism. Calcium D-pantothenate is the stable form used in supplements. It supports adrenal function and energy production.

Benefits

Supports energy metabolism and adrenal health.

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L-Selenomethionine
Good

L-selenomethionine is an organic form of selenium, known for its high bioavailability. It acts as an antioxidant and supports thyroid function. This form is incorporated into proteins, providing a stable source of selenium.

Risks

Excessive selenium intake can lead to selenosis, causing hair loss and nail brittleness.

Benefits

Supports antioxidant defense and thyroid hormone metabolism.

Vitamin D3
Good

Vitamin D3, or cholecalciferol, is the most effective form of vitamin D for raising blood levels. It is crucial for calcium absorption and bone health. This form is synthesized in the skin upon sun exposure.

Risks

Excessive intake can lead to hypercalcemia, causing kidney damage.

Benefits

Enhances calcium absorption and supports bone and immune health.

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Manganese Bisglycinate
Good

Manganese bisglycinate is a chelated form of manganese, known for its high absorption and bioavailability. It is important for bone formation and antioxidant enzyme function. This form reduces the risk of gastrointestinal irritation.

Risks

Excessive manganese intake can lead to neurological issues.

Benefits

Supports bone health and antioxidant defense.

Biotin
Good

Biotin, or vitamin B7, is essential for carbohydrate, fat, and protein metabolism. D-biotin is the naturally occurring, biologically active form. It is known for supporting hair, skin, and nail health.

Benefits

Promotes healthy hair, skin, and nails, and supports metabolic processes.

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Vitamin B6
Good

Vitamin B6, or pyridoxine hydrochloride, is crucial for amino acid metabolism and neurotransmitter synthesis. It supports immune function and hemoglobin production. This form is commonly used in supplements for its stability.

Risks

High doses can cause nerve damage and sensory neuropathy.

Benefits

Supports brain health and aids in the production of neurotransmitters.

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Folic Acid
Neutral

Standard formulation ingredient — neither beneficial nor harmful at typical use.

Risks

Excessive intake can mask vitamin B12 deficiency symptoms.

Benefits

Supports fetal development and reduces the risk of birth defects.

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Processing

Group 1 · Minimally processed

Unprocessed or Minimally Processed Foods

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