Thyroid Spark, Selenium & L-Tyrosine Multi, 60 Vegetarian Capsules
Product Analysis
Transparency Excellent
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| Vitamin D (as Cholecalciferol) (4000 IU) | 100 mcg | 500% |
| Thiamin (Vitamin B1) | 12 mg | 1000% |
| Riboflavin (Vitamin B2) | 13 mg | 1000% |
| Niacin (as Niacinamide) | 8 mg NE | 50% |
| Vitamin B6 (Pyridoxine Hydrochloride) | 8.5 mg | 500% |
| Folate (as L-Methyltetrahydrofolate, Calcium) | 400 mcg DFE | 100% |
| Vitamin B12 (as Methylcobalamin) | 48 mcg | 2000% |
| Pantothenic Acid (as Calcium Pantothenate) | 5 mg | 100% |
| Iodine (as Potassium Iodide and Kelp) | 150 mg | 100% |
| Magnesium (as Magnesium Bisglycinate Chelate) | 84 mg | 20% |
| Zinc (as Zinc Bisglycinate Chelate) | 16.5 mg | 150% |
| Selenium (as Selenomethionine) | 110 mcg | 200% |
| Manganese (as Manganese Bisglycinate Chelate) | 1.15 mg | 50% |
| Copper (as Copper Bisglycinate Chelate) | 0.18 mg | 20% |
| Chromium (as Chromium AA Chelate) | 35 mcg | 100% |
| SPARK Thyroid ComplexL-Tyrosine, KSM-66® Ashwagandha Extract (Withania somnifera) (root), Forskolin Extract (Coleus forskohlii) (root), Guggul Extract (Commiphora mukul) (stem), Atlantic Kelp (Ascophyllum nodosum), Boron (as Bororganic Glycine), BioPerine® Black Pepper Extract (Piper nigrum) (fruit) | 657 mg | † |
Bioavailability Excellent
Absorption Rating
- Vitamin D (as Cholecalciferol) (4000 IU) Good
- Thiamin (Vitamin B1) Good
- Riboflavin (Vitamin B2) Good
- Niacin (as Niacinamide) Good
- Vitamin B6 (Pyridoxine Hydrochloride) Fair
- Folate (as L-Methyltetrahydrofolate, Calcium) Fair
- Vitamin B12 (as Methylcobalamin) Good
- Pantothenic Acid (as Calcium Pantothenate) Good
- Iodine (as Potassium Iodide and Kelp) Good
- Magnesium (as Magnesium Bisglycinate Chelate) Good
- Zinc (as Zinc Bisglycinate Chelate) Good
- Selenium (as Selenomethionine) Good
- Manganese (as Manganese Bisglycinate Chelate) Good
- Copper (as Copper Bisglycinate Chelate) Good
- Chromium (as Chromium AA Chelate) Fair
- SPARK Thyroid ComplexL-Tyrosine, KSM-66® Ashwagandha Extract (Withania somnifera) (root), Forskolin Extract (Coleus forskohlii) (root), Guggul Extract (Commiphora mukul) (stem), Atlantic Kelp (Ascophyllum nodosum), Boron (as Bororganic Glycine), BioPerine® Black Pepper Extract (Piper nigrum) (fruit) Good
Other Ingredients Excellent
Fillers & Additives
- Cellulose (Vegetarian Capsule)
- Rice Extract
Efficacy Good
Dosage Analysis
- Vitamin D (as Cholecalciferol) (4000 IU) 100 mcg Effective
- Thiamin (Vitamin B1) 12 mg Effective
- Riboflavin (Vitamin B2) 13 mg Effective
- Niacin (as Niacinamide) 8 mg NE Under-dosed
- Vitamin B6 (Pyridoxine Hydrochloride) 8.5 mg Effective
- Folate (as L-Methyltetrahydrofolate, Calcium) 400 mcg DFE Effective
- Vitamin B12 (as Methylcobalamin) 48 mcg Effective
- Pantothenic Acid (as Calcium Pantothenate) 5 mg Effective
- Iodine (as Potassium Iodide and Kelp) 150 mg High
- Magnesium (as Magnesium Bisglycinate Chelate) 84 mg Under-dosed
- Zinc (as Zinc Bisglycinate Chelate) 16.5 mg Effective
- Selenium (as Selenomethionine) 110 mcg Effective
- Manganese (as Manganese Bisglycinate Chelate) 1.15 mg Under-dosed
- Copper (as Copper Bisglycinate Chelate) 0.18 mg Under-dosed
- Chromium (as Chromium AA Chelate) 35 mcg Effective
- SPARK Thyroid ComplexL-Tyrosine, KSM-66® Ashwagandha Extract (Withania somnifera) (root), Forskolin Extract (Coleus forskohlii) (root), Guggul Extract (Commiphora mukul) (stem), Atlantic Kelp (Ascophyllum nodosum), Boron (as Bororganic Glycine), BioPerine® Black Pepper Extract (Piper nigrum) (fruit) 657 mg High
Supplement Facts
| Ingredient | Amount | % Daily Value |
|---|---|---|
| Vitamin D (as Cholecalciferol) (4000 IU) | 100 mcg | 500% |
| Thiamin (Vitamin B1) | 12 mg | 1000% |
| Riboflavin (Vitamin B2) | 13 mg | 1000% |
| Niacin (as Niacinamide) | 8 mg NE | 50% |
| Vitamin B6 (Pyridoxine Hydrochloride) | 8.5 mg | 500% |
| Folate (as L-Methyltetrahydrofolate, Calcium) | 400 mcg DFE | 100% |
| Vitamin B12 (as Methylcobalamin) | 48 mcg | 2000% |
| Pantothenic Acid (as Calcium Pantothenate) | 5 mg | 100% |
| Iodine (as Potassium Iodide and Kelp) | 150 mg | 100% |
| Magnesium (as Magnesium Bisglycinate Chelate) | 84 mg | 20% |
| Zinc (as Zinc Bisglycinate Chelate) | 16.5 mg | 150% |
| Selenium (as Selenomethionine) | 110 mcg | 200% |
| Manganese (as Manganese Bisglycinate Chelate) | 1.15 mg | 50% |
| Copper (as Copper Bisglycinate Chelate) | 0.18 mg | 20% |
| Chromium (as Chromium AA Chelate) | 35 mcg | 100% |
| SPARK Thyroid ComplexL-Tyrosine, KSM-66® Ashwagandha Extract (Withania somnifera) (root), Forskolin Extract (Coleus forskohlii) (root), Guggul Extract (Commiphora mukul) (stem), Atlantic Kelp (Ascophyllum nodosum), Boron (as Bororganic Glycine), BioPerine® Black Pepper Extract (Piper nigrum) (fruit) | 657 mg | † |
Other Ingredients
Rice Extract Safe
Price Comparison
Price History
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Is Eu Natural Thyroid Spark, Selenium & L-Tyrosine Multi a good supplement?
Eu Natural Thyroid Spark, Selenium & L-Tyrosine Multi, 60 Vegetarian Capsules received a product quality score of 90/100 in GoodSupp's independent analysis, placing it in the top tier of supplements we've analyzed. The product contains 16 active ingredients with 30 servings per container. All 2 inactive ingredients (fillers, binders, capsule materials) are rated safe — a clean formulation with no flagged additives.
What are the ingredients in Eu Natural Thyroid Spark, Selenium & L-Tyrosine Multi?
Eu Natural Thyroid Spark, Selenium & L-Tyrosine Multi contains 16 active ingredients: Vitamin D (as Cholecalciferol) (4000 IU) (100 mcg), Thiamin (Vitamin B1) (12 mg), Riboflavin (Vitamin B2) (13 mg), Niacin (as Niacinamide) (8 mg NE), Vitamin B6 (Pyridoxine Hydrochloride) (8.5 mg), Folate (as L-Methyltetrahydrofolate, Calcium) (400 mcg DFE), and 10 more. Notable high-dose ingredients include Vitamin D at 500% DV, Thiamin at 1000% DV, Riboflavin at 1000% DV. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.
Is Eu Natural Thyroid Spark, Selenium & L-Tyrosine Multi safe to take?
Eu Natural Thyroid Spark, Selenium & L-Tyrosine Multi, 60 Vegetarian 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.
What is magnesium good for?
Magnesium Good For is a topic many supplement consumers ask about. In the context of dietary supplements, understanding magnesium good for helps you make more informed choices about what you put in your body. The quality and form of ingredients matters significantly — two products listing the same ingredient can differ dramatically in bioavailability and effectiveness. GoodSupp analyzes over 250,000 supplement products to help consumers understand exactly what's in their supplements and whether the formulation meets quality standards.
How much magnesium per day?
The optimal dosage depends on your individual health needs, age, sex, and current nutrient levels. Recommended daily amounts are established by health authorities but may vary from therapeutic doses used in clinical research. It's important to check the Supplement Facts label for the exact amount per serving and compare it against the % Daily Value. Some supplements provide mega-doses well above the Daily Value, which may not be necessary and in some cases could be harmful — particularly for fat-soluble vitamins (A, D, E, K) that accumulate in the body. GoodSupp's efficacy analysis evaluates whether a product's dosages align with clinically studied amounts. Always consult your healthcare provider for personalized dosage recommendations.
What is zinc good for?
Zinc Good For is a topic many supplement consumers ask about. In the context of dietary supplements, understanding zinc good for helps you make more informed choices about what you put in your body. The quality and form of ingredients matters significantly — two products listing the same ingredient can differ dramatically in bioavailability and effectiveness. GoodSupp analyzes over 250,000 supplement products to help consumers understand exactly what's in their supplements and whether the formulation meets quality standards.
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