PlainVitamins

Tri-Alkali

by Pure Encapsulations · powder · 12.4 ounces

  • On the market (NIH)
  • UPC 7 66298 01112 7
  • DSLD label 294058
  • Serving 3.9 g (1 Scoop)
  • 90 servings

Tri-Alkali by Pure Encapsulations lists 5 ingredients, 5 with an amount per serving of 3.9 g, such as 10 mcg (400 IU) of vitamin D, 250 mg of calcium, 150 mg of magnesium and 400 mg of potassium. Its current label entered the NIH Dietary Supplement Label Database on July 18, 2023.

What is in Tri-Alkali?

Each row as the label prints it, per serving of 3.9 g. 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).

Tri-Alkali: Supplement Facts rows against the market (DSLD label 294058, January 2026 release)
IngredientAmount% DVAmong products listing it
Vitamin Das Cholecalciferol, Vitamin D3400 IU10 mcg (400 IU)50%Vitamin D in Tri-Alkali against 14,175 products10 mcg per serving; the middle half of products list 10 mcg to 25 mcg, the median 15 mcg.DV 20 mcgUL 100 mcg10 mcg

57% of 14,175 products listing vitamin D give more (median 15 mcg). Per day at the most servings: 20 mcg.

Calciumas Calcium Citrate250 mg19%Calcium in Tri-Alkali against 17,831 products250 mg per serving; the middle half of products list 50 mg to 252 mg, the median 115 mg.DV 1,300 mgUL 2,500 mg250 mg

Higher than 73% of 17,831 products listing calcium (median 115 mg). Per day at the most servings: 500 mg.

Magnesiumas Magnesium Citrate150 mg36%Magnesium in Tri-Alkali 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). Per day at the most servings: 300 mg.

Potassiumas Potassium Citrate400 mg9%Potassium in Tri-Alkali against 11,614 products400 mg per serving; the middle half of products list 50 mg to 190 mg, the median 99 mg.DV 4,700 mg400 mg

Higher than 92% of 11,614 products listing potassium (median 99 mg). Per day at the most servings: 800 mg.

GlycineFree-Form200 mgGlycine in Tri-Alkali against 1,078 products200 mg per serving; the middle half of products list 100 mg to 846 mg, the median 300 mg.200 mg

56% of 1,078 products listing glycine give more (median 300 mg). Per day at the most servings: 400 mg.

Source: NIH ODS Dietary Supplement Label Database, label 294058 (entered July 18, 2023), version 9.4.0. See the label on DSLD or its label image (PDF). 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:

  • Its 400 mg of potassium is higher than 92% of the 11,614 potassium products that print an amount; 821 list more.

The NIH database records 2 servings 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 Tri-Alkali'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
Recommendations: As a dietary supplement, take 1 scoop two times daily, with meals, or as directed by a health professional.
Warnings
Warning: Not to be taken if you have hyperkalemia or abnormal kidney function, or take ACE inhibitors or potassium sparing diuretics. If you are pregnant or lactating, have any health condition or are taking any medication, consult your health professional before use.
Keep out of the reach of children.
Use only if safety seal is intact.
Allergens and what it does not contain
Certified Gluten-Free by the Gluten-Free Certification Organization, www.gluten.org
Gluten-free, Non-GMO & Hypoallergenic
Storage
Store in a cool, dry place.

Source: label statements in DSLD label 294058.

What else is on the label?

Other ingredients: Stevia Leaf Extract.

Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): GFCO.org (Gluten-Free Certification Organization). Listed with: Certified gluten-free (GFCO) (a seal is the label's claim; the certifier's own list confirms it).

How many labels does Tri-Alkali have?

3 labels are on file under this name since April 25, 2019: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 294058 (current) Entered July 18, 2023 · on the market · 12.4 ounces · UPC 7 66298 01112 7
  2. Label 219333 Entered April 23, 2020 · off the market January 2, 2019 · 352 grams · UPC 7 66298 01112 7
  3. Label 188707 Entered April 25, 2019 · off the market July 21, 2022 · 12.4 oz. · UPC 7 66298 01112 7

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

Who makes it?

The label names Pure Encapsulations (manufacturer), Sudbury, MA. All Pure Encapsulations products.

Where next?