What's the difference between Calcium citrate and calcium carbonate

The difference between the two supplements include (a) the percentage of elemental calcium provided per 100mg, and (b) the way the body absorbs the supplement. Calcium carbonate is made up of 40% elemental calcium and 60% carbonate ingredient, so one 600mg tablet provides 240mg calcium. Calcium Citrate is made up of 20% elemental calcium and 80% citrate ingredient, so one 600mg tablet provides 120mg calcium. While you are technically getting more elemental calcium from a Calcium carbonate supplement, Calcium citrate supplements are absorbed more easily than calcium carbonate. They can be taken on an empty stomach and are also more readily absorbed by people who take acid-reducing heartburn medications.

What is the Expiration date?

the date should be on the bottle or box it comes in

is the bottle printed with "enter code for wellness rewards points... " right of the nature made brand in the green area? the amazon's picture has .

Some have the code for the points and some products don't have a code. Nature Made started a new program in May of 2015. and most of the codes now go for a chance to win something. Go to http://www.naturemade.com/ If you have an account there. sign in with your e mail and check the FAQ's There it will tell you all about the program. I haven't purchased any Nature Made products that had any code at all on them in over a year. Hope this helps you.

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💪 Strong bones, smarter you — stay ahead with Nature Made!

BONE BOOSTING POWER - 600 mg calcium plus 400 IU vitamin D3 to fortify your skeletal foundation.
LONG LASTING SUPPLY - 220 tablets ensure nearly 8 months of daily bone support—never run out.
CLEAN PURE FORMULA - No artificial colors, flavors, or gluten—just pure, trusted ingredients.
OPTIMIZED ABSORPTION - Vitamin D3 enhances calcium uptake, maximizing every dose’s impact.
CLINICALLY VERIFIED QUALITY - USP verified for purity and potency, because your health deserves the best.

Nature Made Calcium 600 mg with Vitamin D3 delivers a potent daily dose of bone-supporting nutrients in a clean, gluten-free formula. Each bottle contains 220 tablets, providing up to 220 days of consistent calcium and vitamin D3 intake, verified by USP standards to ensure quality and potency. Designed to support bone strength and optimize calcium absorption, this supplement is ideal for adults seeking long-term skeletal health.

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