Kirkman Labs Spectrum Complete™ II with 5-MTHF, 300 Capsules supplement bottle
Kirkman Labs

Spectrum Complete™ II with 5-MTHF, 300 Capsules

What We Researched
44 active ingredients analyzed · 2 inactive ingredients decoded · 1 brand certification checked · 3 retailers compared · Last updated: Mar 2026
88
Product Score Good
81
Brand Score Good

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Vitamin A (as Retinol and Beta-Carotene) (2,000 IU) 600 mcg RAE 66%
Vitamin C (as Ascorbic Acid, Magnesium & Potassium Ascorbates) 300 mg 333%
Vitamin D3 (as Cholecalciferol) (400 IU) 10 mcg 50%
Vitamin E (as Alpha-Tocopherol) (30 IU) 20 mg 133%
Vitamin B1 (as Thiamine Mononitrate) 5 mg 417%
Vitamin B2 (as Riboflavin-5-Phosphate) 7 mg 538%
Vitamin B3 (as Niacinamide) 20 mg NE 125%
Vitamin B6 (as Pyridoxal 5'-P and Pyridoxine HCl) 10 mg 588%
Folate (as L/6S-5-MTHF-Ca)Folic Acid 135 mcg) 225 mcg DFE 56%
Vitamin B12 (as Cyanocobalamin) 170 mcg 7,083%
Biotin 100 mcg 333%
Vitamin B5 (as D-Calcium Pantothenate) 10 mg 200%
Choline (as Dihydrogen Citrate) 25 mg 5%
Calcium (from Carbonate, Bisglycinate) 280 mg 22%
Iodine (from Potassium Iodide) 150 mcg 100%
Magnesium (from Citrate, Ascorbate) 201 mg 48%
Zinc (from Zinc Sulfate) 20 mg 182%
Selenium (from Glycinate Complex) 70 mcg 127%
Manganese (from Sulfate) 2 mg 87%
Chromium (from Nicotinate Glycinate Chelate) 50 mcg 143%
Molybdenum (from Glycinate) 100 mcg 222%
Kirkman® Proprietary BlendAlpha Ketoglutaric Acid, Taurine, Glycine, DMAE (Dimethyl Amino Ethanol L-Bitartrate, Inositol, Coenzyme Q10, Beta Glucan (from Yeast), Grape (Vitis vinifera) (seed) Extract 605 mg *
Vitamin A (as Retinol and Beta-Carotene) (2,000 IU) 600 mcg RAE 66%
Vitamin C (as Ascorbic Acid, Magnesium & Potassium Ascorbates) 300 mg 333%
Vitamin D3 (as Cholecalciferol) (400 IU) 10 mcg 50%
Vitamin E (as Alpha-Tocopherol) (30 IU) 20 mg 133%
Vitamin B1 (as Thiamine Mononitrate) 5 mg 417%
Vitamin B2 (as Riboflavin-5-Phosphate) 7 mg 538%
Vitamin B3 (as Niacinamide) 20 mg NE 125%
Vitamin B6 (as Pyridoxal 5'-P and Pyridoxine HCl) 10 mg 588%
Folate (as L/6S-5-MTHF-Ca)Folic Acid 135 mcg) 225 mcg DFE 56%
Vitamin B12 (as Cyanocobalamin) 170 mcg 7,083%
Biotin 100 mcg 333%
Vitamin B5 (as D-Calcium Pantothenate) 10 mg 200%
Choline (as Dihydrogen Citrate) 25 mg 5%
Calcium (from Carbonate, Bisglycinate) 280 mg 22%
Iodine (from Potassium Iodide) 150 mcg 100%
Magnesium (from Citrate, Ascorbate) 201 mg 48%
Zinc (from Zinc Sulfate) 20 mg 182%
Selenium (from Glycinate Complex) 70 mcg 127%
Manganese (from Sulfate) 2 mg 87%
Chromium (from Nicotinate Glycinate Chelate) 50 mcg 143%
Molybdenum (from Glycinate) 100 mcg 222%
Kirkman® Proprietary BlendAlpha Ketoglutaric Acid, Taurine, Glycine, DMAE (Dimethyl Amino Ethanol L-Bitartrate, Inositol, Coenzyme Q10, Beta Glucan (from Yeast), Grape (Vitis vinifera) (seed) Extract 605 mg *
Bioavailability Very Good

Absorption Rating

  • Vitamin A (as Retinol and Beta-Carotene) (2,000 IU) Fair
  • Vitamin C (as Ascorbic Acid, Magnesium & Potassium Ascorbates) Good
  • Vitamin D3 (as Cholecalciferol) (400 IU) Good
  • Vitamin E (as Alpha-Tocopherol) (30 IU) Good
  • Vitamin B1 (as Thiamine Mononitrate) Fair
  • Vitamin B2 (as Riboflavin-5-Phosphate) Good
  • Vitamin B3 (as Niacinamide) Good
  • Vitamin B6 (as Pyridoxal 5'-P and Pyridoxine HCl) Fair
  • Folate (as L/6S-5-MTHF-Ca)Folic Acid 135 mcg) Fair
  • Vitamin B12 (as Cyanocobalamin) Fair
  • Biotin Good
  • Vitamin B5 (as D-Calcium Pantothenate) Good
  • Choline (as Dihydrogen Citrate) Fair
  • Calcium (from Carbonate, Bisglycinate) Good
  • Iodine (from Potassium Iodide) Good
  • Magnesium (from Citrate, Ascorbate) Good
  • Zinc (from Zinc Sulfate) Fair
  • Selenium (from Glycinate Complex) Good
  • Manganese (from Sulfate) Good
  • Chromium (from Nicotinate Glycinate Chelate) Good
  • Molybdenum (from Glycinate) Good
  • Kirkman® Proprietary BlendAlpha Ketoglutaric Acid, Taurine, Glycine, DMAE (Dimethyl Amino Ethanol L-Bitartrate, Inositol, Coenzyme Q10, Beta Glucan (from Yeast), Grape (Vitis vinifera) (seed) Extract Fair
  • Vitamin A (as Retinol and Beta-Carotene) (2,000 IU) Fair
  • Vitamin C (as Ascorbic Acid, Magnesium & Potassium Ascorbates) Good
  • Vitamin D3 (as Cholecalciferol) (400 IU) Good
  • Vitamin E (as Alpha-Tocopherol) (30 IU) Good
  • Vitamin B1 (as Thiamine Mononitrate) Fair
  • Vitamin B2 (as Riboflavin-5-Phosphate) Good
  • Vitamin B3 (as Niacinamide) Good
  • Vitamin B6 (as Pyridoxal 5'-P and Pyridoxine HCl) Fair
  • Folate (as L/6S-5-MTHF-Ca)Folic Acid 135 mcg) Fair
  • Vitamin B12 (as Cyanocobalamin) Fair
  • Biotin Good
  • Vitamin B5 (as D-Calcium Pantothenate) Good
  • Choline (as Dihydrogen Citrate) Fair
  • Calcium (from Carbonate, Bisglycinate) Good
  • Iodine (from Potassium Iodide) Good
  • Magnesium (from Citrate, Ascorbate) Good
  • Zinc (from Zinc Sulfate) Fair
  • Selenium (from Glycinate Complex) Good
  • Manganese (from Sulfate) Good
  • Chromium (from Nicotinate Glycinate Chelate) Good
  • Molybdenum (from Glycinate) Good
  • Kirkman® Proprietary BlendAlpha Ketoglutaric Acid, Taurine, Glycine, DMAE (Dimethyl Amino Ethanol L-Bitartrate, Inositol, Coenzyme Q10, Beta Glucan (from Yeast), Grape (Vitis vinifera) (seed) Extract Fair
Other Ingredients Excellent

Fillers & Additives

  • Vegetarian Capsule (Hypromellose and Water)
  • Silicon Dioxide
Efficacy Good

Dosage Analysis

  • Vitamin A (as Retinol and Beta-Carotene) (2,000 IU) 600 mcg RAE Under-dosed
  • Vitamin C (as Ascorbic Acid, Magnesium & Potassium Ascorbates) 300 mg Effective
  • Vitamin D3 (as Cholecalciferol) (400 IU) 10 mcg Under-dosed
  • Vitamin E (as Alpha-Tocopherol) (30 IU) 20 mg Effective
  • Vitamin B1 (as Thiamine Mononitrate) 5 mg Effective
  • Vitamin B2 (as Riboflavin-5-Phosphate) 7 mg Effective
  • Vitamin B3 (as Niacinamide) 20 mg NE Effective
  • Vitamin B6 (as Pyridoxal 5'-P and Pyridoxine HCl) 10 mg Effective
  • Folate (as L/6S-5-MTHF-Ca)Folic Acid 135 mcg) 225 mcg DFE Under-dosed
  • Vitamin B12 (as Cyanocobalamin) 170 mcg Effective
  • Biotin 100 mcg Effective
  • Vitamin B5 (as D-Calcium Pantothenate) 10 mg Effective
  • Choline (as Dihydrogen Citrate) 25 mg Under-dosed
  • Calcium (from Carbonate, Bisglycinate) 280 mg Under-dosed
  • Iodine (from Potassium Iodide) 150 mcg Effective
  • Magnesium (from Citrate, Ascorbate) 201 mg Effective
  • Zinc (from Zinc Sulfate) 20 mg Effective
  • Selenium (from Glycinate Complex) 70 mcg Effective
  • Manganese (from Sulfate) 2 mg Effective
  • Chromium (from Nicotinate Glycinate Chelate) 50 mcg Effective
  • Molybdenum (from Glycinate) 100 mcg Effective
  • Kirkman® Proprietary BlendAlpha Ketoglutaric Acid, Taurine, Glycine, DMAE (Dimethyl Amino Ethanol L-Bitartrate, Inositol, Coenzyme Q10, Beta Glucan (from Yeast), Grape (Vitis vinifera) (seed) Extract 605 mg Under-dosed
  • Vitamin A (as Retinol and Beta-Carotene) (2,000 IU) 600 mcg RAE Under-dosed
  • Vitamin C (as Ascorbic Acid, Magnesium & Potassium Ascorbates) 300 mg Effective
  • Vitamin D3 (as Cholecalciferol) (400 IU) 10 mcg Under-dosed
  • Vitamin E (as Alpha-Tocopherol) (30 IU) 20 mg Effective
  • Vitamin B1 (as Thiamine Mononitrate) 5 mg Effective
  • Vitamin B2 (as Riboflavin-5-Phosphate) 7 mg Effective
  • Vitamin B3 (as Niacinamide) 20 mg NE Effective
  • Vitamin B6 (as Pyridoxal 5'-P and Pyridoxine HCl) 10 mg Effective
  • Folate (as L/6S-5-MTHF-Ca)Folic Acid 135 mcg) 225 mcg DFE Under-dosed
  • Vitamin B12 (as Cyanocobalamin) 170 mcg Effective
  • Biotin 100 mcg Effective
  • Vitamin B5 (as D-Calcium Pantothenate) 10 mg Effective
  • Choline (as Dihydrogen Citrate) 25 mg Under-dosed
  • Calcium (from Carbonate, Bisglycinate) 280 mg Under-dosed
  • Iodine (from Potassium Iodide) 150 mcg Effective
  • Magnesium (from Citrate, Ascorbate) 201 mg Effective
  • Zinc (from Zinc Sulfate) 20 mg Effective
  • Selenium (from Glycinate Complex) 70 mcg Effective
  • Manganese (from Sulfate) 2 mg Effective
  • Chromium (from Nicotinate Glycinate Chelate) 50 mcg Effective
  • Molybdenum (from Glycinate) 100 mcg Effective
  • Kirkman® Proprietary BlendAlpha Ketoglutaric Acid, Taurine, Glycine, DMAE (Dimethyl Amino Ethanol L-Bitartrate, Inositol, Coenzyme Q10, Beta Glucan (from Yeast), Grape (Vitis vinifera) (seed) Extract 605 mg Under-dosed

Supplement Facts

Ingredient Amount % Daily Value
Vitamin A (as Retinol and Beta-Carotene) (2,000 IU) 600 mcg RAE 66%
Vitamin C (as Ascorbic Acid, Magnesium & Potassium Ascorbates) 300 mg 333%
Vitamin D3 (as Cholecalciferol) (400 IU) 10 mcg 50%
Vitamin E (as Alpha-Tocopherol) (30 IU) 20 mg 133%
Vitamin B1 (as Thiamine Mononitrate) 5 mg 417%
Vitamin B2 (as Riboflavin-5-Phosphate) 7 mg 538%
Vitamin B3 (as Niacinamide) 20 mg NE 125%
Vitamin B6 (as Pyridoxal 5'-P and Pyridoxine HCl) 10 mg 588%
Folate (as L/6S-5-MTHF-Ca)Folic Acid 135 mcg) 225 mcg DFE 56%
Vitamin B12 (as Cyanocobalamin) 170 mcg 7,083%
Biotin 100 mcg 333%
Vitamin B5 (as D-Calcium Pantothenate) 10 mg 200%
Choline (as Dihydrogen Citrate) 25 mg 5%
Calcium (from Carbonate, Bisglycinate) 280 mg 22%
Iodine (from Potassium Iodide) 150 mcg 100%
Magnesium (from Citrate, Ascorbate) 201 mg 48%
Zinc (from Zinc Sulfate) 20 mg 182%
Selenium (from Glycinate Complex) 70 mcg 127%
Manganese (from Sulfate) 2 mg 87%
Chromium (from Nicotinate Glycinate Chelate) 50 mcg 143%
Molybdenum (from Glycinate) 100 mcg 222%
Kirkman® Proprietary BlendAlpha Ketoglutaric Acid, Taurine, Glycine, DMAE (Dimethyl Amino Ethanol L-Bitartrate, Inositol, Coenzyme Q10, Beta Glucan (from Yeast), Grape (Vitis vinifera) (seed) Extract 605 mg *
Vitamin A (as Retinol and Beta-Carotene) (2,000 IU) 600 mcg RAE 66%
Vitamin C (as Ascorbic Acid, Magnesium & Potassium Ascorbates) 300 mg 333%
Vitamin D3 (as Cholecalciferol) (400 IU) 10 mcg 50%
Vitamin E (as Alpha-Tocopherol) (30 IU) 20 mg 133%
Vitamin B1 (as Thiamine Mononitrate) 5 mg 417%
Vitamin B2 (as Riboflavin-5-Phosphate) 7 mg 538%
Vitamin B3 (as Niacinamide) 20 mg NE 125%
Vitamin B6 (as Pyridoxal 5'-P and Pyridoxine HCl) 10 mg 588%
Folate (as L/6S-5-MTHF-Ca)Folic Acid 135 mcg) 225 mcg DFE 56%
Vitamin B12 (as Cyanocobalamin) 170 mcg 7,083%
Biotin 100 mcg 333%
Vitamin B5 (as D-Calcium Pantothenate) 10 mg 200%
Choline (as Dihydrogen Citrate) 25 mg 5%
Calcium (from Carbonate, Bisglycinate) 280 mg 22%
Iodine (from Potassium Iodide) 150 mcg 100%
Magnesium (from Citrate, Ascorbate) 201 mg 48%
Zinc (from Zinc Sulfate) 20 mg 182%
Selenium (from Glycinate Complex) 70 mcg 127%
Manganese (from Sulfate) 2 mg 87%
Chromium (from Nicotinate Glycinate Chelate) 50 mcg 143%
Molybdenum (from Glycinate) 100 mcg 222%
Kirkman® Proprietary BlendAlpha Ketoglutaric Acid, Taurine, Glycine, DMAE (Dimethyl Amino Ethanol L-Bitartrate, Inositol, Coenzyme Q10, Beta Glucan (from Yeast), Grape (Vitis vinifera) (seed) Extract 605 mg *

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Vegetarian Capsule (Hypromellose and Water) Safe

It provides a vegetarian encapsulation option.

Silicon Dioxide Safe

Prevents clumping and ensures consistent dosing.

Price Comparison

Price History

Tracked across major retailers. Updated periodically.

$44$43$42$41$40 Mar 12 $42.00
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Prices shown at time of last check. Click a retailer to see current price. GoodSupp is not affiliated with any retailer.

Brand Trust Report
Kirkman Labs

Founded 1949 · Lake Oswego, Oregon, U.S. · 74 products · kirkmangroup.com

Certifications

1 certification
Fda Gmp Inspections Verified Source

Transparency

5 claims
Third Party Testing Claim — Verified Source
Coa Availability — Claimed Source
Testing Lab Disclosure — Claimed Source
In House Testing — Verified Source

Violation History

1 incident
Fda Warning Marketing unapproved new drugs and misbranded drugs (sodium fluoride products).2016-01-13Source
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Frequently Asked Questions
Is Kirkman Labs Spectrum Complete™ II with 5-MTHF, 300 Capsules a good supplement?

Kirkman Labs Spectrum Complete™ II with 5-MTHF, 300 Capsules received a product quality score of 88/100 in GoodSupp's independent analysis, indicating strong overall quality. The product contains 44 active ingredients with 75 servings per container. All 2 inactive ingredients (fillers, binders, capsule materials) are rated safe — a clean formulation with no flagged additives. The manufacturer, Kirkman Labs, holds a brand trust score of 81/100 with 1 verified certifications including Fda Gmp Inspections.

What are the ingredients in Kirkman Labs Spectrum Complete™ II with 5-MTHF, 300 Capsules?

Kirkman Labs Spectrum Complete™ II with 5-MTHF, 300 Capsules contains 44 active ingredients: Vitamin A (as Retinol and Beta-Carotene) (2,000 IU) (600 mcg RAE), Vitamin C (as Ascorbic Acid, Magnesium & Potassium Ascorbates) (300 mg), Vitamin D3 (as Cholecalciferol) (400 IU) (10 mcg), Vitamin E (as Alpha-Tocopherol) (30 IU) (20 mg), Vitamin B1 (as Thiamine Mononitrate) (5 mg), Vitamin B2 (as Riboflavin-5-Phosphate) (7 mg), and 38 more. Notable high-dose ingredients include Vitamin C at 333% DV, Vitamin B1 at 417% DV, Vitamin B2 at 538% DV. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Kirkman Labs Spectrum Complete™ II with 5-MTHF, 300 Capsules safe to take?

Kirkman Labs Spectrum Complete™ II with 5-MTHF, 300 Capsules has been analyzed for ingredient safety across all its components. All 2 inactive ingredients — including capsule materials, fillers, and binders — are rated safe based on regulatory data and published safety research. This is a clean formulation with no controversial additives. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

Is Kirkman Labs a trustworthy supplement brand?

Kirkman Labs receives a brand trust score of 81/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1949 and headquartered in Lake Oswego, Oregon, U.S., the company offers 74 products in their lineup. They hold 1 verified certifications including Fda Gmp Inspections. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: Kirkman Labs has 1 historical regulatory incident 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. 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.