Nature's Bounty Calcium + D3 Tablets Review

Nature's Bounty Calcium + D3 Tablets, 500 ct. is a calcium and vitamin D3 supplement sold by BJ's under item number 320861. The product comes as 500 tablets in one container. According to the product overview, it is designed to support bone health, and immune support is listed as a stated feature. The listing also says the tablets help reduce the risk of osteoporosis. A footnote on the page explains that adequate calcium and vitamin D as part of a healthful diet, along with physical activity, may reduce the risk of osteoporosis in later life. The Smart Summary on the page describes the product as delivering 100% of the daily vitamin D3 requirement in each tablet, which the page says helps ensure optimal calcium absorption and supports bone health. It also describes a dual-action formula that combines 600mg of calcium with vitamin D3 to promote bone strength. The brand description states that Nature's Bounty has been making trusted products for 50 years, backed by science, and made with what the page calls the purest ingredients. The page says calcium and vitamin D promote bone health. The listed product features include supports bone health, immune support, and reduce risk of osteoporosis. The product is labelled as free of soy, gluten, wheat, and yeast. The package includes calcium and D3 tablets, 500 ct. The active ingredients are listed as calcium and vitamin D. The safety information advises that anyone who is pregnant, nursing, taking any medications, or has a medical condition should consult a doctor before use. The instructions for use say that for adults, one tablet should be taken one or two times a day, preferably with meals. The specifications table lists the form as tablet, the count as 500, the quantity as 500 count, the product type as calcium, and the minimum age as 18 years and older. The item is marked shellfish-free and not vegetarian. The item dimensions are 3.64 inches long, 3.64 inches wide, and 7.18 inches high, and the item weight is 2.18 pounds. The page notes that product information is supplied by the supplier and that BJ's does not represent or warrant the information is accurate or complete. Shoppers are told to check the product label, warnings, and instructions before use. Estimated delivery is 3 to 5 business days. The page shows 15 ratings and a Q and A section with zero questions.

Product Focus: Occasional Heartburn: Fast ReliefAlso covers:DigestionBones
Tier ⓘ
Members see this product's tier and why. Tiers run from 1, the strongest evidence, to 5. How we grade →
Evidence ⓘ
How strongly the evidence says this product works: human studies count most, then real reviews, then our biohacker panel.
Positive Reviews
Biohacker Mentions

Study, Trial or Testing Result Summary

MembersHuman studies

Calcium is the main ingredient here, at 500 mg per tablet, the 420 mg dose that in studies. placebo-controlled trials found a single 420 mg dose of calcium carbonate acid in the food pipe and meal-related heartburn. …

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Review Totals and Summary

Members5,789 reviews
5,789 reviews · Walmart 4,414 · Walgreens 1,068 · Cvs 196 · Naturesbounty 96 · BJ's 15

Nature's Bounty Calcium + D3 Tablets generally receive a reception, with about 15 ratings across various stores, and of those ratings giving 4 or 5 stars. This summary focuses exclusively on feedback for the tablets, excluding reviews for other forms like softgels or capsules. **What Buyers Say It Did For Them** customers find these tablets to be an effective and supplement. …

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Biohacker Summary

MembersWhat our biohacker panel says

Those who it say it supports bones, nerves, muscles and the heart, and one suggests 1,000 to 1,200 milligrams a day, which can be filled with calcium carbonate or calcium citrate. Another of the three describes it as a bone-building mineral alongside phosphorus, magnesium and boron. …

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RAL Summary

MembersThe tier and why

The final check notes: The tier was based on a vitamin D survey with dose or results, which is a , instead of the calcium trials that support this goal. …

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More Details

MembersBody systems · Combine with · Possible side effects

Body systems: Digestive system, Skeletal system. Combine with and possible side are for members.

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Supplement Facts

Vitamin D 400 IU · Calcium 500 mg
Supplement Facts
Serving Size 1 Tablet
Servings Per Container 300
Amount Per Serving% Daily Value
Vitamin D (as D3 Cholecalciferol)400 IU100%
Calcium (from Oyster Shell)500 mg50%
Sodium5 mg<1%
* Percent Daily Values are based on a 2,000 calorie diet.

Other ingredients: Vegetable Cellulose, Vegetable Magnesium Stearate.

Directions: For adults, take one (1) tablet one or two times a day, preferably with meals.

Label source: Naturesbounty · Report a label change

Where to Buy

Bjs

We sell no supplements. Prices change; check the store.

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Our articles on this subject

Graded October 28, 2026 by the Reverse Age Lab evidence engine, from human studies, real reviews and our biohacker panel. How we grade. Is this medical advice? No. Rala organizes the published evidence; go over any change with your doctor, especially if you take meds.