Home/ Supplements/ Vitamin D/ Spark

Spark

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

This product looks safe

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

What the Evidence Says

✨ AI-generated · Qwen 3.6 · methodology

This formula contains a blend of B vitamins and Vitamin D, which are supported by strong evidence for their roles in energy metabolism and immune function. These nutrients act as essential cofactors for cellular energy production. However, the overall evidence coverage for this specific ingredient combination is limited.

AI-generated summary based on research evidence. Not medical advice.

Label

Product Label

Label for Spark
Open Full PDF View on NIH DSLD →
Details

Label Data

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

Supplement Facts — Evidence Check

4000 IU (1000% DV)
6.7× RDA — above typical dose (UL: 0.1 mg) 608 studies (A:16, B:251)
15 mg (1000% DV)
12.5× RDA — above typical dose 76 studies (A:0, B:33)
17 mg (1000% DV)
13.1× RDA — above typical dose 13 studies (A:0, B:1)
10 mg (50% DV)
Within RDA (0.7× RDA) 196 studies (A:5, B:63)
10 mg (500% DV)
7.7× RDA — above typical dose (UL: 100 mg) 114 studies (A:3, B:35)
400 mcg (100% DV)
Within RDA (1.0× RDA) 226 studies (A:10, B:105)
120 mcg (2000% DV)
50.0× RDA — above typical dose 139 studies (A:1, B:44)
10 mg (100% DV)
2.0× RDA — within safe limits 2 studies — no high-quality reviews
150 mcg (100% DV)
Within RDA (1.0× RDA) 245 studies (A:4, B:133)
80 mg (20% DV)
Within RDA (0.2× RDA) 316 studies (A:8, B:159)
22.5 mg (150% DV)
2.0× RDA — within safe limits 263 studies (A:6, B:134)
140 mcg (200% DV)
2.5× RDA — within safe limits 173 studies (A:0, B:67)
1 mg (50% DV)
Within RDA (0.4× RDA) 9 studies — no high-quality reviews
0.5 mg (25% DV)
Within RDA (0.6× RDA) 37 studies (A:0, B:11)
120 mcg (100% DV)
3.4× RDA — above typical dose 199 studies (A:1, B:55)
Spark Thyroid Complex
604 mg

Other Ingredients

Cellulose Rice Extract
Claims

Label Claims — Verification

Unverified Nutrient
Unverified All Other
Unverified Structure/Function
Info

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

Metadata

Product Details

UPC / SKU8 55244 00818 9
DSLD Entry Date2021-12-18
Product TypeOther Combinations
FormCapsule
BrandEu Natural
DSLD ID258018
Data Updated2026-04-11
Research

Research Evidence

872
Research Sources
53
Avg Quality
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
A Vitamin D supplementation for prevention of mortality in adults
Meta Analysis The Cochrane database of systematic reviews 2014 PubMed DOI
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
A Vitamin D supplementation for prevention of cancer in adults
Meta Analysis The Cochrane database of systematic reviews 2014 PubMed DOI
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
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 →
Compare

Similar Products

Prostate-D
Pure Essence Labs · Capsule
100
Vitamin D3
Arthri-D · Capsule
100
Rx Support Anti-Depressant
Bronson Laboratories · Capsule
100
Vitamin D3 2000 IU
OL Olympian Labs · Capsule
100
Bonistein-Max
Douglas Laboratories · Capsule
100
View all Vitamin D products →
Vitamin D research Best Vitamin D All Vitamin D products More from Eu Natural View on NIH DSLD →

This product page is for informational purposes only and does not constitute medical advice. Always consult your healthcare provider before taking any supplement.