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U.S. Doctors' Clinical

Calcium Magnesium Vitamin D3

2 Tablets · 60 servings · $0.25/serving

iHerbAmazon

Best for

DentalBone & JointImmune

Ingredients (4)

Vitamin D3

100%

Dose

1000 IU

Target

1000–5000 IU

Form

Premium

Calcium

100%

Dose

1200 mg

Target

200–600 mg

Form

Standard

Magnesium

80%

Dose

80 mg

Target

100–400 mg

Form

Not listed

Magnesium Oxide

80%

Dose

80 mg

Target

100–400 mg

Form

Budget

Other Ingredients (15)

Agave NectarSweetener

Agave nectar is ~70–90% fructose by composition (vs sucrose's 50% and high-fructose corn syrup's 55%). Low glycemic index is a fructose artifact — fructose bypasses insulin-mediated metabolism and is preferentially shuttled to hepatic de novo lipogenesis. Chronic high-fructose intake is associated with hepatic steatosis, insulin resistance, and adverse lipid changes (Stanhope 2009 RCT). The 'natural' / 'healthier than sugar' marketing positioning contradicts the metabolic profile. Per brand voice: this is a clearer case than most of marketing-vs-science divergence.

IsomaltSweetener

A poorly-absorbed sugar alcohol that can cause bloating, gas, and laxative effects at higher doses (EFSA notes laxative threshold for polyols). Tolerable for most, but cumulative across products.

MaltodextrinBinder

Spikes blood sugar faster than table sugar (glycemic index 85–105). Research links it to gut bacteria changes that may promote intestinal inflammation (Nickerson et al. 2015). Used as a cheap filler — adds nothing beneficial.

Bamboo ExtractFiller

Plant-derived silica source used as a natural anti-caking agent and carrier (silica content ~70%)

Medium Chain Triglyceride OilCarrier

Fractionated oils rich in C8/C10 triglycerides used as neutral carrier or anti-sticking agent

Calcium CarbonateBuffer

Common calcium salt used as a buffering agent, filler, or mineral fortification in supplements

Guar GumThickener

Natural thickener derived from guar beans

Gum AcaciaBinder

Natural plant gum (acacia) used as a binder, stabilizer, and emulsifier in foods and supplements

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Sources & Scoring

Nutrient data (RDA, UL, and safety thresholds) sourced from: NIH Office of Dietary Supplements and National Academies Dietary Reference Intakes (DRI).

This is not medical advice. Consult a healthcare provider before making changes to your supplement routine.

The score analyzes what's on the label: ingredient doses vs. clinical ranges, chemical forms, evidence levels, and known interactions. It does not verify label accuracy or test for contaminants — for that, look for third-party certifications like USP or NSF.

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