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PowerCal 1000 mg

product on market Tablet or Pill Advanced Nutrition by Zahler Safety: 95/100
95/100

This product looks safe

  • Magnesium: 750mg is 2.1× the Tolerable Upper Intake Level (350mg)
  • 38% of ingredients have research evidence
C Label Compliance Grade

What the Evidence Says

✨ AI-generated · Qwen 3.6 · methodology

This formula combines calcium and vitamin D3, which have strong evidence for supporting bone density and mineral absorption. Magnesium, zinc, and manganese provide moderate evidence for supporting metabolic functions and skeletal health. The ingredient profile is generally well-tolerated with a high safety score.

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

Alerts

Safety Alerts

Magnesium: 750mg is 2.1× the Tolerable Upper Intake Level (350mg)

Label

Product Label

Label for PowerCal 1000 mg
Open Full PDF View on NIH DSLD →
Details

Label Data

2 Tablet(s)
Serving Size
45
Servings
Botanical with Nutrients
Product Type
38%
Evidence Coverage
Ingredients

Supplement Facts — Evidence Check

10 mcg (50% DV)
Within RDA (0.7× RDA) 608 studies (A:16, B:251)
Calcium
1000 mg (77% DV)
750 mg (179% DV)
Exceeds UL by 2.1× (UL: 350 mg) 316 studies (A:8, B:159)
10 mg (91% DV)
Within RDA (0.9× RDA) 263 studies (A:6, B:134)
3 mg (130% DV)
1.3× RDA — within safe limits 9 studies — no high-quality reviews
Strontium
650 mg
Oat Straw, Powder
40 mg
3 mg
Market median: 3.0mg (58 products) 3 studies — no high-quality reviews

Other Ingredients

Stearic Acid Microcrystalline Cellulose Croscarmellose Sodium Magnesium Stearate Silicon Dioxide Pharmaceutical Glaze
Claims

Label Claims — Verification

Unverified Nutrient
Unverified All Other
Unverified Structure/Function
Info

Product Information

Directions for Use

Directions: Take 4 tablets daily, preferably 2 tablets twice a day with food, or as directed by a healthcare practitioner.

Warnings & Precautions

Keep out of reach of children

Do not use if safety seal is damaged or missing.

If pregnant, nursing or on medication, consult with your healthcare practitioner.

Formulation Notes

Supports healthy bones, teeth and gums

Calcium is important for building and maintaining optimal bone health. Zahler PowerCal formula includes a blend of nutrients that support calcium absorption in the body.

Kosher Pareve D OU Kosher Under the strict supervision of Rabbi SH. Stern & The Orthodox Union

Non-GMO Dairy free Soy free

PowerCal 1000 mg per serving Comprehensive calcium formula

Supports healthy bones, teeth, and gums Bone & joint

Additional Information

You may need additional supplements to support a healthy diet; consult your nutritionist for a formula that is right for you or contact us at 877-ASK-ZAHLER (877-275-9245) or ask@zahlers.com.

Kosher Pareve D OU Kosher This product was manufactured in a GMP certified facility

Store tightly closed in a cool, dry place.

Made in the USA

Metadata

Product Details

UPC / SKU8 48998 08137 9
DSLD Entry Date2023-11-22
Product TypeBotanical with Nutrients
FormTablet or Pill
BrandAdvanced Nutrition by Zahler
DSLD ID301106
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 →
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This product page is for informational purposes only and does not constitute medical advice. Always consult your healthcare provider before taking any supplement.