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GNC Energy & Metabolism supplement bottle
GNC

Energy & Metabolism Review

What We Researched
35 active ingredients analyzed · 5 inactive ingredients decoded · 10 brand certifications checked · Page generated: Sep 2026
68
Product Score Fair
96
Brand Score Excellent

Two independent scores — the product and the brand behind it, never blended into one number. See our methodology.

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Vitamin A (as Beta-Carotene, Retinyl Acetate) 5000 IU 100%
Vitamin C (as Ascorbic Acid, Calcium Ascorbate) 300 mg 500%
Vitamin D (as Cholecalciferol, Vitamin D3) 1600 IU 400%
Vitamin E (as D-Alpha-Tocopherol Acetate) 30 IU 100%
Vitamin K (as Phytonadione) 80 mcg 100%
Thiamine (as Thiamine Mononitrate, Vitamin B1) 50 mg 3333%
Riboflavin (as Vitamin B2) 50 mg 2941%
Niacin (as Niacin, Niacinamide) 50 mg 250%
Vitamin B6 (as Pyridoxine Hydrochloride) 50 mg 2500%
Folic Acid 400 mcg 100%
Vitamin B12 (as Cyanocobalamin) 50 mcg 833%
Biotin 300 mcg 100%
Pantothenic Acid (as Calcium D-Pantothenate) 50 mg 500%
Calcium (as Calcium Carbonate) 50 mg 20%
Iodine (as Potassium Iodide) 150 mcg 100%
Magnesium (as Magnesium Oxide) 100 mg 25%
Zinc (as Zinc Oxide) 25 mg 167%
Selenium (as L-Selenomethionine) 200 mcg 286%
Copper (as Cupric Oxide) 2 mg 100%
Manganese (as Manganese Sulfate) 2 mg 100%
Chromium (as Chromium Chelate) 120 mcg 100%
Molybdenum (as Sodium Molybdate) 75 mcg 100%
Energy & Metabolism Blend 119 mg †
Proprietary Amino Acid Blend 100 mg †
Green Tea extract 40 mg †
Alpha-Lipoic Acid 25 mg †
Choline (as Choline Bitartrate) 10 mg †
Inositol 10 mg †
Silica (as Silicon Dioxide) 4 mg †
Boron (as Boron Hydrolyzed Protein Chelate) 2 mg †
Lutemax 2020 Lutein 950 mcg †
Lycopene 950 mcg †
Zeaxanthin (as Zeaxanthin Isomers) 190 mcg †
Astaxanthin 5 mcg †
Vanadium (as Sodium Metavanadate) 10 mcg †
Bioavailability Good

Absorption Rating

  • Vitamin A (as Beta-Carotene, Retinyl Acetate) Good
  • Vitamin C (as Ascorbic Acid, Calcium Ascorbate) Good
  • Vitamin D (as Cholecalciferol, Vitamin D3) Good
  • Vitamin E (as D-Alpha-Tocopherol Acetate) Good
  • Vitamin K (as Phytonadione) Fair
  • Thiamine (as Thiamine Mononitrate, Vitamin B1) Fair
  • Riboflavin (as Vitamin B2) Good
  • Niacin (as Niacin, Niacinamide) Good
  • Vitamin B6 (as Pyridoxine Hydrochloride) Fair
  • Folic Acid Fair
  • Vitamin B12 (as Cyanocobalamin) Fair
  • Biotin Good
  • Pantothenic Acid (as Calcium D-Pantothenate) Good
  • Calcium (as Calcium Carbonate) Fair
  • Iodine (as Potassium Iodide) Good
  • Magnesium (as Magnesium Oxide) Poor
  • Zinc (as Zinc Oxide) Poor
  • Selenium (as L-Selenomethionine) Good
  • Copper (as Cupric Oxide) Poor
  • Manganese (as Manganese Sulfate) Good
  • Chromium (as Chromium Chelate) Fair
  • Molybdenum (as Sodium Molybdate) Good
  • Proprietary Amino Acid Blend Good
  • Green Tea extract Good
  • Alpha-Lipoic Acid Fair
  • Choline (as Choline Bitartrate) Poor
  • Inositol Good
  • Silica (as Silicon Dioxide) Poor
  • Boron (as Boron Hydrolyzed Protein Chelate) Fair
  • Lutemax 2020 Lutein Good
  • Lycopene Good
  • Zeaxanthin (as Zeaxanthin Isomers) Good
  • Astaxanthin Fair
  • Vanadium (as Sodium Metavanadate) Poor
Other Ingredients Good

Fillers & Additives

  • Cellulose
  • Titanium Dioxide High
  • Vegetable Acetoglycerides
  • Caramel Color
  • Ethyl Vanillin
Efficacy Fair

Dosage Analysis

  • Vitamin A (as Beta-Carotene, Retinyl Acetate) 5000 IU Under-dosed
  • Vitamin C (as Ascorbic Acid, Calcium Ascorbate) 300 mg Effective
  • Vitamin D (as Cholecalciferol, Vitamin D3) 1600 IU Effective
  • Vitamin E (as D-Alpha-Tocopherol Acetate) 30 IU Effective
  • Vitamin K (as Phytonadione) 80 mcg Under-dosed
  • Thiamine (as Thiamine Mononitrate, Vitamin B1) 50 mg Effective
  • Riboflavin (as Vitamin B2) 50 mg Effective
  • Niacin (as Niacin, Niacinamide) 50 mg High
  • Vitamin B6 (as Pyridoxine Hydrochloride) 50 mg Effective
  • Folic Acid 400 mcg Effective
  • Vitamin B12 (as Cyanocobalamin) 50 mcg Effective
  • Biotin 300 mcg Effective
  • Pantothenic Acid (as Calcium D-Pantothenate) 50 mg Effective
  • Calcium (as Calcium Carbonate) 50 mg Under-dosed
  • Iodine (as Potassium Iodide) 150 mcg Effective
  • Magnesium (as Magnesium Oxide) 100 mg Under-dosed
  • Zinc (as Zinc Oxide) 25 mg Effective
  • Selenium (as L-Selenomethionine) 200 mcg Effective
  • Copper (as Cupric Oxide) 2 mg Effective
  • Manganese (as Manganese Sulfate) 2 mg Effective
  • Chromium (as Chromium Chelate) 120 mcg Effective
  • Molybdenum (as Sodium Molybdate) 75 mcg Effective
  • Proprietary Amino Acid Blend 100 mg Under-dosed
  • Green Tea extract 40 mg Under-dosed
  • Alpha-Lipoic Acid 25 mg Under-dosed
  • Choline (as Choline Bitartrate) 10 mg Under-dosed
  • Inositol 10 mg Under-dosed
  • Boron (as Boron Hydrolyzed Protein Chelate) 2 mg Under-dosed
  • Lutemax 2020 Lutein 950 mcg Under-dosed
  • Lycopene 950 mcg Under-dosed
  • Zeaxanthin (as Zeaxanthin Isomers) 190 mcg Under-dosed
  • Astaxanthin 5 mcg Under-dosed

Supplement Facts

Ingredient Amount % Daily Value
Vitamin A (as Beta-Carotene, Retinyl Acetate) 5000 IU 100%
Vitamin C (as Ascorbic Acid, Calcium Ascorbate) 300 mg 500%
Vitamin D (as Cholecalciferol, Vitamin D3) 1600 IU 400%
Vitamin E (as D-Alpha-Tocopherol Acetate) 30 IU 100%
Vitamin K (as Phytonadione) 80 mcg 100%
Thiamine (as Thiamine Mononitrate, Vitamin B1) 50 mg 3333%
Riboflavin (as Vitamin B2) 50 mg 2941%
Niacin (as Niacin, Niacinamide) 50 mg 250%
Vitamin B6 (as Pyridoxine Hydrochloride) 50 mg 2500%
Folic Acid 400 mcg 100%
Vitamin B12 (as Cyanocobalamin) 50 mcg 833%
Biotin 300 mcg 100%
Pantothenic Acid (as Calcium D-Pantothenate) 50 mg 500%
Calcium (as Calcium Carbonate) 50 mg 20%
Iodine (as Potassium Iodide) 150 mcg 100%
Magnesium (as Magnesium Oxide) 100 mg 25%
Zinc (as Zinc Oxide) 25 mg 167%
Selenium (as L-Selenomethionine) 200 mcg 286%
Copper (as Cupric Oxide) 2 mg 100%
Manganese (as Manganese Sulfate) 2 mg 100%
Chromium (as Chromium Chelate) 120 mcg 100%
Molybdenum (as Sodium Molybdate) 75 mcg 100%
Energy & Metabolism Blend 119 mg †
Proprietary Amino Acid Blend 100 mg †
Green Tea extract 40 mg †
Alpha-Lipoic Acid 25 mg †
Choline (as Choline Bitartrate) 10 mg †
Inositol 10 mg †
Silica (as Silicon Dioxide) 4 mg †
Boron (as Boron Hydrolyzed Protein Chelate) 2 mg †
Lutemax 2020 Lutein 950 mcg †
Lycopene 950 mcg †
Zeaxanthin (as Zeaxanthin Isomers) 190 mcg †
Astaxanthin 5 mcg †
Vanadium (as Sodium Metavanadate) 10 mcg †

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Cellulose Safe

Provides bulk and structure in tablets and capsules.

Titanium Dioxide Caution

Used as a whitening agent in tablet coatings and capsules.

Vegetable Acetoglycerides Unknown
Caramel Color Generally_safe

It provides a brown color to the product.

Ethyl Vanillin Generally_safe

It is used to add vanilla flavor to the supplement.

Brand Trust Report
GNC

Founded 1935 · Pittsburgh, Pennsylvania, USA · 1590 products · gnc.com

Certifications

10 certifications
Informed Sport Source available Primary evidence
Nsf Certified For Sport Source available Primary evidence
Clean Label Project Source available Primary evidence
Labdoor Source available Primary evidence
Consumerlab Source available Primary evidence
Fda Gmp Inspections Source available Primary evidence
Usda Organic Source available Primary evidence
Vegan Certified Source available Primary evidence
Nsf Gmp Source available Primary evidence
Informed Choice Supporting evidence unavailable

Transparency

5 claims
Third Party Testing Claim — Verified Evidence available Evidence
Testing Lab Disclosure — Verified Evidence available Evidence
In House Testing — Claimed Brand claim; evidence unavailable
Contains Proprietary Blend — True Brand claim; evidence unavailable

Violation History

34 incidents
Prop 65 Not specified on product pageOngoing Source available Primary source
Recall GNC Women's 30+ Vitapak2025-06-13 Source available Primary source
Recall GNC Women's 30+ Vitapak2025-06-13 Source available Primary source
Recall GNC Women's 30+ Vitapak2025-06-09 Source available Primary source
Recall GNC Women's 30+ Vitapak2025-06-05 Source available Primary source
Recall GNC Women's 30+ Vitapak2025-04-25 Source available Primary source
Lawsuit Misrepresentation of the amount of elemental magnesium in 'Super Magnesium' supplements.2024 Source available Primary source
Lawsuit Misrepresentation of the amount of elemental magnesium in 'Super Magnesium' supplements.2024 Source available Primary source
Lawsuit Mislabeled magnesium content in 'Super Magnesium' supplements.2024 Source available Primary source
Lawsuit Misrepresentation of magnesium content in 'Super Magnesium' supplements.2024 Source available Primary source
Recall GNC Women's Ultra Mega, Women's Ultra Mega Active, Women's Ultra Mega Energy and Metabolism, and Prenatal Formula with Iron2023-01-12 Source available Primary source
Lawsuit Falsely advertising 'Total Lean' protein bars as 'lean'.2023 Source available Primary source
Lawsuit Selling Vitamin E Skin Oil that was primarily composed of vegetable oil.2020 Source available Primary source
Lawsuit Selling Vitamin E Skin Oil that was mostly vegetable oil.2020 Source available Primary source
Prop 65 Lead, Cadmium2019-02-07 Source available Primary source
Prop 65 Lead and/or Cadmium2019-02-07 Source available Primary source
Prop 65 Lead, Cadmium2019-02-07 Source available Primary source
Prop 65 Lead, Cadmium2019-02-07 Source available Primary source
Prop 65 lead and/or cadmium2019-02-07 Source available Primary source
Lawsuit Deceptively labeling dietary supplements as if they have FDA approval.2019 Source available Primary source
Lawsuit Deceptively advertising fake markdowns online to mislead consumers into thinking items were on 'sale.'2019 Source available Primary source
Lawsuit Deceptively labeling dietary supplements regarding FDA approval and failing to include required disclaimers.2019 Source available Primary source
Lawsuit Using fake 'original' prices to deceive customers.2019 Source available Primary source
Recall Women's Iron Complete Dietary Supplement 60-count caplets2018-12-19 Source available Primary source
Prop 65 Lead2018-10-12 Source available Primary source
Prop 65 Lead2018-10-12 Source available Primary source
Recall Various GNC Women's Multivitamins2018-01-04 Source available Primary source
Recall GNC Women's Ultra Mega Time Release2016-11-18 Source available Primary source
Recall GNC Women's Ultra Mega Time Release 180-count2016-11-16 Source available Primary source
Lawsuit Knowingly selling products containing unlawful synthetic chemicals (picamilon, BMPEA, and acacia rigidula).2016 Source available Primary source
Lawsuit Unfair discontinuation of the Gold Card discount program.2016 Source available Primary source
Fda Warning Inclusion of unapproved dietary ingredient Beta-methylphenethylamine (BMPEA) in products.2015-04-01 Source available Primary source
Lawsuit Mislabeling of herbal supplements2015 Source available Primary source
Lawsuit Selling products containing illegal synthetic ingredients.2015 Source available Primary source
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Frequently Asked Questions
Is GNC Energy & Metabolism a good supplement?

GNC Energy & Metabolism received a product quality score of 68/100 in GoodSupp's independent analysis, suggesting some areas that could be improved. The product contains 35 active ingredients with 108 servings per container. Of the 5 inactive ingredients, 3 are rated safe and 1 ingredient is flagged for review. The manufacturer, GNC, holds a brand trust score of 96/100.

What are the ingredients in GNC Energy & Metabolism?

GNC Energy & Metabolism contains 35 active ingredients: Vitamin A (as Beta-Carotene, Retinyl Acetate) (5000 IU), Vitamin C (as Ascorbic Acid, Calcium Ascorbate) (300 mg), Vitamin D (as Cholecalciferol, Vitamin D3) (1600 IU), Vitamin E (as D-Alpha-Tocopherol Acetate) (30 IU), Vitamin K (as Phytonadione) (80 mcg), Thiamine (as Thiamine Mononitrate, Vitamin B1) (50 mg), and 29 more. Notable high-dose ingredients include Vitamin C at 500% DV, Vitamin D at 400% DV, Thiamine at 3333% DV. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is GNC Energy & Metabolism safe to take?

GoodSupp reviewed the inactive-ingredient data available for GNC Energy & Metabolism. Of 5 inactive ingredients, 3 are rated safe. 1 ingredient is flagged for review: Titanium Dioxide. 'Caution' doesn't mean dangerous — it indicates the ingredient has some considerations worth being aware of, such as potential sensitivities or ongoing research. This label analysis cannot determine whether the product is safe for a particular person, and source labels may change. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

Is GNC a trustworthy supplement brand?

GNC receives a brand trust score of 96/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1935 and headquartered in Pittsburgh, Pennsylvania, USA, the company offers 1590 products in their lineup. Note: GNC has 34 historical regulatory incidents on record, which are factored into the trust score.

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Disclaimer: GoodSupp provides independent supplement quality analysis for informational purposes only. Scores are generated algorithmically based on ingredient profiles, brand certifications, and public records — read our methodology. This is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Product data is sourced from manufacturer labels and public databases. GoodSupp is not affiliated with any supplement brand.