Synergistic Magnesium 150 mg Plus Calcium And Vitamin B6

by Quest · tablet or pill · 90 tablets

  • Off the market since October 2023 (NIH)
  • UPC 0 58371 21389 5
  • DSLD label 23705
  • Serving 3 tablets

Synergistic Magnesium 150 mg Plus Calcium And Vitamin B6 by Quest lists 4 ingredients, 4 with an amount per serving of 3 tablets, such as 150 mg of elemental magnesium, 30 mg of elemental calcium, 20 mg of vitamin B6 and 15 mg of elemental phosphorus. Its current label entered the NIH Dietary Supplement Label Database on July 25, 2013.

What is in Synergistic Magnesium 150 mg Plus Calcium And Vitamin B6?

Each row as the label prints it, per serving of 3 tablets. The capsule beside an amount places it among every product in the NIH database that lists the same ingredient: the bar is the middle half of their amounts, the line in it the median, the whiskers the 10th and 90th percentiles; the green tick is the FDA Daily Value and the red dashed tick the adult upper limit (IOM).

Synergistic Magnesium 150 mg Plus Calcium And Vitamin B6: Supplement Facts rows against the market (DSLD label 23705, January 2026 release)
IngredientAmount% DVAmong products listing it
Elemental Magnesiumas {magnesium} HVP chelate150 mg36%*Magnesium in Synergistic Magnesium 150 mg Plus Calcium And Vitamin B6 against 14,003 products150 mg per serving; the middle half of products list 30 mg to 200 mg, the median 86 mg.UL 350 mgDV 420 mg150 mg

Higher than 70% of 14,003 products listing magnesium (median 86 mg).

Elemental Calciumas {calcium} HVP chelate30 mg2%*Calcium in Synergistic Magnesium 150 mg Plus Calcium And Vitamin B6 against 17,831 products30 mg per serving; the middle half of products list 50 mg to 252 mg, the median 115 mg.DV 1,300 mgUL 2,500 mg30 mg

84% of 17,831 products listing calcium give more (median 115 mg).

Vitamin B6as Pyridoxine Hydrochloride20 mg1,176%*Vitamin B6 in Synergistic Magnesium 150 mg Plus Calcium And Vitamin B6 against 15,277 products20 mg per serving; the middle half of products list 2 mg to 20 mg, the median 6 mg.DV 1.7 mgUL 100 mg20 mg

Higher than 71% of 15,277 products listing vitamin B6 (median 6 mg).

Elemental Phosphorusas {phosphorus} HVP chelate15 mg1%*Phosphorus in Synergistic Magnesium 150 mg Plus Calcium And Vitamin B6 against 3,786 products15 mg per serving; the middle half of products list 45 mg to 200 mg, the median 90 mg.DV 1,250 mgUL 4,000 mg15 mg

95% of 3,786 products listing phosphorus give more (median 90 mg).

* % Daily Value computed from the printed amount and the FDA Daily Value (21 CFR 101.9); the label prints none for that row.

Source: NIH ODS Dietary Supplement Label Database, label 23705 (entered July 25, 2013), version 9.4.0. See the label on DSLD. Amounts are what the maker printed; DSLD does not test products. Daily Values: the FDA's Daily Value page.

Is that a lot?

The rows in the top or bottom tenth of the products that list the same ingredient, and any above the adult upper limit at the most servings a day the directions give:

  • 95% of the 3,786 products that print an amount of phosphorus list more than its 15 mg of elemental phosphorus (filed by NIH under phosphorus) (median 90 mg).

The NIH database records one serving a day from the label's directions; its % Daily Values are for adults and children 4 or more years of age. The directions as printed are further down this page.

The Tolerable Upper Intake Level is the most of a nutrient per day, from food, water and supplements together, that is likely to pose no risk for almost all adults (Institute of Medicine, 2011). It does not apply under medical supervision. This page compares labels; it is not medical advice.

Sources: amounts from the DSLD label; Daily Values from 21 CFR 101.9(c)(8)(iv); adult upper limits from the Institute of Medicine's DRI summary tables (2011). How positions are computed.

Which products have the closest formulas?

The products whose ingredient lists overlap most with Synergistic Magnesium 150 mg Plus Calcium And Vitamin B6's, rare ingredients counting for more.

Source: ingredient lists of every product's current label in DSLD (version 9.4.0); similarity weights each shared ingredient by how rare it is.

What does the label say about taking it?

Quoted from the label as DSLD transcribed it: the maker's words, including any claim about what the product does, which the FDA has not evaluated and PlainVitamins does not endorse.

Directions
Recommended Use: Helps in the development and maintenance of bones and teeth. Helps to maintain proper muscle function. Recommended Dose (Adults): Take 3 tablets daily, one with each meal, or as directed by a health care practitioner.
Warnings
Risk Information: Some individuals may experience gastrointestinal disturbances such as diarrhea.
KEEP OUT OF REACH OF CHILDREN.
DO NOT USE IF SEAL UNDER CAP IS BROKEN.
Allergens and what it does not contain
This product does not contain dairy, egg, gluten, shellfish, sulfites, wheat or animal derivatives.
No artificial colours, flavours or preservatives
Storage
STORE IN A COOL, DRY PLACE.

Source: label statements in DSLD label 23705.

What else is on the label?

Other ingredients: Croscarmellose Sodium, Magnesium Stearate, Microcrystalline Cellulose, Stearic Acid, Dicalcium Phosphate, Glycerin, Cellulose.

Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): PREMIUM - QUALITY ASSURED; {Recycle}; SunOpta A healthy products company.

How many labels does Synergistic Magnesium 150 mg Plus Calcium And Vitamin B6 have?

One label is on file, entered on July 25, 2013.

  1. Label 23705 (current) Entered July 25, 2013 · off the market October 12, 2023 · 90 tablets · UPC 0 58371 21389 5

Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).

Who makes it?

The label names SunOpta Inc. (manufacturer), Acton, ON. All Quest products.

Where next?