Spark

product on market Capsule Eu Natural 🟢 Safety: 100/100
Brand: Eu Natural
🟢 100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • 81% of ingredients have research evidence
A Label Compliance Grade

Product Label

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Label Data

1 Vegetarian Capsule(s) Serving Size
30 Servings
Other Combinations Product Type
81% Evidence Coverage

Supplement Facts — Evidence Check

4000 IU (1000% DV)
📊 6.7× RDA — above typical dose (UL: 0.1 mg) 📚 604 studies (Tier A: 16, B: 251)
RDA 0.015mg This product: 0.1mg UL 0.1mg
15 mg (1000% DV)
📊 12.5× RDA — above typical dose 📚 76 studies (Tier A: 0, B: 33)
RDA 1.2mg This product: 15mg
17 mg (1000% DV)
📊 13.1× RDA — above typical dose 📚 12 studies (Tier A: 0, B: 1)
RDA 1.3mg This product: 17mg
10 mg (50% DV)
✅ Within RDA (0.7× RDA of 14 mg) 📚 193 studies (Tier A: 5, B: 63)
RDA 14mg This product: 10mg UL 35mg
10 mg (500% DV)
📊 7.7× RDA — above typical dose (UL: 100 mg) 📚 113 studies (Tier A: 3, B: 35)
RDA 1.3mg This product: 10mg UL 100mg
400 mcg (100% DV)
✅ Within RDA (1.0× RDA of 0.4 mg) 📚 225 studies (Tier A: 10, B: 105)
RDA 0.4mg This product: 0.4mg UL 1.0mg
120 mcg (2000% DV)
📊 50.0× RDA — above typical dose 📚 138 studies (Tier A: 1, B: 44)
RDA 0.0024mg This product: 0.12mg
10 mg (100% DV)
✅ 2.0× RDA — within safe limits 📚 1 studies — no high-quality reviews
RDA 5mg This product: 10mg
150 mcg (100% DV)
✅ Within RDA (1.0× RDA of 0.15 mg) 📚 243 studies (Tier A: 4, B: 133)
RDA 0.15mg This product: 0.15mg UL 1.1mg
80 mg (20% DV)
📊 Market median: 4002.0mg (1 products) 📚 20 studies (Tier A: 0, B: 2)
This product: 80mg
22.5 mg (150% DV)
✅ 2.0× RDA — within safe limits 📚 258 studies (Tier A: 6, B: 134)
RDA 11mg This product: 22.5mg UL 40mg
140 mcg (200% DV)
✅ 2.5× RDA — within safe limits 📚 172 studies (Tier A: 0, B: 67)
RDA 0.055mg This product: 0.14mg UL 0.4mg
1 mg (50% DV)
✅ Within RDA (0.4× RDA of 2.3 mg) 📚 8 studies — no high-quality reviews
RDA 2.3mg This product: 1mg UL 11mg
0.5 mg (25% DV)
✅ Within RDA (0.6× RDA of 0.9 mg) 📚 36 studies (Tier A: 0, B: 11)
RDA 0.9mg This product: 0.5mg UL 10mg
120 mcg (100% DV)
📊 3.4× RDA — above typical dose 📚 197 studies (Tier A: 1, B: 55)
RDA 0.035mg This product: 0.12mg
Spark Thyroid Complex
604 mg

Other Ingredients

Cellulose Rice Extract

Label Claims — Verification

❓ Nutrient
❓ All Other
❓ Structure/Function
All Other (99% of products) Structure/Function (85% of products) Nutrient (70% of products) Approved Health (4% of products)

Target Groups

Adult (18 - 50 Years) Gluten Free

Product Information

📋 Directions for Use

Suggested Use 1 capsule twice daily with a meal and 8 oz. water Take two capsules twice daily for immediate support. Do not exceed two capsules at one time.

⚠️ Warnings & Precautions

Caution: Keep out of reach of children.

If you are pregnant, nursing, or taking any prescription medicine, consult your physician before taking this product.

Gluten & wheat free, KSM-66 contains a milk-derivative

🧪 Formulation Notes

Taken to promote thyroid health, Spark provides essential vitamins, minerals, and herbal extracts to support your energy and metabolism system.

Zinc & Selenium

Thyroid health Energy & metabolism

Zero fillers, zero binders, zero artificial ingredients Gluten & wheat free, KSM-66 contains a milk-derivative

Additional Information

Plant-powered multi-blends for "Eu" (you)!

CGMP certified Blended in the USA

Share your story #EuNatural #BeYou

Product Details

UPC / SKU 8 55244 00818 9
DSLD Entry Date 2021-12-18
Product Type Other Combinations
Form Capsule
Brand Eu Natural
DSLD ID 258018
Data Updated 2026-04-11

Research Evidence

872 Research Sources
53 Avg Quality Score
309 Meta Analysis
309 Clinical Trial
111 Rct
71 Systematic Review
55 Guideline
4 Cochrane Review
4 Regulatory Source
2 Other
2 Narrative Review
2 Observational
1 Openfda Safety
A Vitamin D and vitamin D analogues for preventing fractures associated with involutional and post-menopausal osteoporosis
Meta Analysis The Cochrane database of systematic reviews 2009
PubMed DOI Cochrane
A Vitamin D supplementation for prevention of mortality in adults
Meta Analysis The Cochrane database of systematic reviews 2014
PubMed DOI Cochrane
A Vitamin D and vitamin D analogues for preventing fractures in post-menopausal women and older men
Meta Analysis The Cochrane database of systematic reviews 2014
PubMed DOI Cochrane
A Vitamin D supplementation for prevention of cancer in adults
Meta Analysis The Cochrane database of systematic reviews 2014
PubMed DOI Cochrane
A Interventions for preventing falls in older people in care facilities and hospitals
Meta Analysis The Cochrane database of systematic reviews 2018
PubMed DOI
A Drugs for preventing lung cancer in healthy people
Meta Analysis The Cochrane database of systematic reviews 2020
PubMed DOI
A Vitamin D supplementation for prevention of mortality in adults
Meta Analysis The Cochrane database of systematic reviews 2011
PubMed DOI Cochrane
A High prevalence of vitamin D deficiency in Asia: A systematic review and meta-analysis
Meta Analysis Critical reviews in food science and nutrition 2023
PubMed DOI
A The effect of vitamin D supplementation on depressive symptoms in adults: A systematic review and meta-analysis of randomized controlled trials
Meta Analysis Critical reviews in food science and nutrition 2023
PubMed DOI
A Interventions for preventing falls in older people living in the community
Meta Analysis The Cochrane database of systematic reviews 2009
PubMed DOI
View all evidence for Vitamin D →

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