Acid-A-Cal Formula
by Nature's Way · capsule · 100 capsules
- On the market (NIH)
- UPC 7 63948 01151 3
- DSLD label 337226
- Serving 2 capsules
- 50 servings
Acid-A-Cal Formula by Nature's Way lists 9 ingredients, 4 with an amount per serving of 2 capsules, such as 100 mg of vitamin C, 19.7 mg of vitamin B6, 130 mg of calcium and 11 mg of magnesium; 5 sit inside a blend without their own amounts, beside 1 Nutrition Facts row (calories, fat and the like). Its current label entered the NIH Dietary Supplement Label Database on August 22, 2025.
What is in Acid-A-Cal Formula?
Each row as the label prints it, per serving of 2 capsules. 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).
| Ingredient | Amount | % DV | Among products listing it |
|---|---|---|---|
| Total Carbohydrates | less than 1 g | 1% | |
| Vitamin Cas Ascorbic Acid | 100 mg | 111% | 50% of 18,583 products listing vitamin C give more (median 100 mg). Per day at the most servings: 200 mg. |
| Vitamin B6as Pyridoxal 5-Phosphate, Pyridoxine Hydrochloride | 19.7 mg | 1,159% | Higher than 71% of 15,277 products listing vitamin B6 (median 6 mg). Per day at the most servings: 39.4 mg. |
| Calciumas Calcium Chloride, Dicalcium Phosphate | 130 mg | 10% | Higher than 54% of 17,831 products listing calcium (median 115 mg). Per day at the most servings: 260 mg. |
| Magnesiumas Magnesium Glycerophosphate | 11 mg | 3% | 91% of 14,003 products listing magnesium give more (median 86 mg). Per day at the most servings: 22 mg. |
| Acidifying Blend | 524 mg | ||
| Ammonium Chloride | in the blend, no amount given | ||
| Betaine Hydrochloride | in the blend, no amount given | ||
| Bovine Kidney | in the blend, no amount given | ||
| Lemon Bioflavonoidsas Citrus x limon | in the blend, no amount given | ||
| Rose Hips | in the blend, no amount given |
Source: NIH ODS Dietary Supplement Label Database, label 337226 (entered August 22, 2025), 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:
- 91% of the 14,003 products that print an amount of magnesium list more than its 11 mg of magnesium (median 86 mg).
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 Acid-A-Cal Formula's, rare ingredients counting for more.
- Acid-A-Cal FormulaEnzymatic Therapy · off the market 8 shared, 68% alike
- Acid-A-CalEnzymatic Therapy · off the market 7 shared, 64% alike
- Acid-A-MedTerry Naturally 6 shared, 53% alike
- Betaine HCLDC 4 shared, 37% alike
- Betaine HydrochlorideWonder Laboratories 4 shared, 37% alike
- Betaine HydrochlorideSP Standard Process 4 shared, 37% alike
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
- Recommendation: Adults take 2 capsules twice daily, preferably with meals.
- Warnings
- Keep out of reach of children.
- Safety sealed with inner seal. Do not use if seal is broken or missing.
- Do not exceed recommended dose. Caution: Not recommended for use if peptic ulcer, gastritis, or heartburn are present.
- If you are pregnant, nursing, or taking any medications, consult a healthcare professional before use.
- Allergens and what it does not contain
- Gluten free. No wheat, soy, dairy, gelatin, or artificial color or flavors.
- Storage
- Keep tightly closed. Store at room temperature. Avoid excessive heat and direct sunlight.
Source: label statements in DSLD label 337226.
What else is on the label?
Other ingredients: Cellulose, Hypromellose, Magnesium Stearate.
How many labels does Acid-A-Cal Formula have?
4 labels are on file under this name since December 22, 2019: other sizes, label designs and reformulations. The current one leads this page.
- Label 337226 (current) Entered August 22, 2025 · on the market · 100 capsules · UPC 7 63948 01151 3
- Label 304614 Entered April 23, 2024 · off the market May 15, 2025 · 100 capsules · UPC 7 63948 01151 3
- Label 212434 Entered December 22, 2019 · off the market August 4, 2023 · 100 capsules · UPC 7 63948 01151 3
- Label 212431 Entered December 22, 2019 · off the market October 1, 2019 · 100 capsules · UPC 7 63948 01151 3
Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).
Who makes it?
The label names Nature's Way Brands, LLC (distributor), Green Bay, WI. All Nature's Way products.