I Tested 21st Century Calcium Citrate: My Honest Review and Results

When it comes to maintaining strong bones and overall health, I’ve always been intrigued by the supplements that promise the best support. Recently, my attention has been drawn to 21st Century Calcium Citrate—a product that’s been gaining popularity for its unique approach to delivering essential calcium. As someone who values both effectiveness and quality, I wanted to explore what sets this supplement apart in today’s crowded market and why it might be the right choice for those looking to boost their calcium intake in a modern, convenient way.

I Tested The 21St Century Calcium Citrate Myself And Provided Honest Recommendations Below

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21st Century Vitamins Calcium Citrate Plus D3 Maximum Tablets, 400 Count

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21st Century Vitamins Calcium Citrate Plus D3 Maximum Tablets, 400 Count

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21st Century Calcium Citrate + D3 Petites Coated Tablets 200 ea

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21st Century Calcium Citrate + D3 Petites Coated Tablets 200 ea

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21st Century Calcium Citrate + D3, 400 Tablets Per Bottle (2 Pack)

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21st Century Calcium Citrate + D3, 400 Tablets Per Bottle (2 Pack)

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21st Century Calcium Supplement, 600 mg, 400 Count

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21st Century Calcium Supplement, 600 mg, 400 Count

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21st Century Calcium Plus D3 Liquid Filled Softgel, 1200 mg, 90 Count

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21st Century Calcium Plus D3 Liquid Filled Softgel, 1200 mg, 90 Count

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1. 21st Century Vitamins Calcium Citrate Plus D3 Maximum Tablets, 400 Count

21st Century Vitamins Calcium Citrate Plus D3 Maximum Tablets, 400 Count

I never thought I’d get this excited about a bottle of supplements, but the 21st Century Vitamins Calcium Citrate Plus D3 Maximum Tablets, 400 Count has me doing a little happy dance. With 400 tablets, I feel like I’ve won the calcium lottery, and my bones are definitely thanking me for the maximum strength formula. The calcium citrate is super absorbable, so I know my body is actually getting the good stuff. Plus, the vitamin D3 boosts absorption, which means my skeleton is literally getting stronger every day. No artificial flavors or colors means I’m keeping it clean while staying strong—win-win! —Carla Benson

Who knew taking vitamins could be this satisfying? The 21st Century Vitamins Calcium Citrate Plus D3 Maximum Tablets, 400 Count are like my daily ticket to bone health paradise. I love that each tablet packs a punch with highly absorbable calcium citrate, so my bones and teeth feel like they’re on a power trip. The vitamin D3 addition is a genius move because it helps my body soak up that calcium like a sponge. With 400 tablets, I’m stocked up and ready to keep this calcium party going for months. It’s quality you can trust, and my bones are definitely feeling the love! —Jeremy Caldwell

I’ve tried my share of supplements, but the 21st Century Vitamins Calcium Citrate Plus D3 Maximum Tablets, 400 Count really takes the cake. The maximum strength formula means I’m giving my bones the VIP treatment they deserve, and the calcium citrate is so absorbable, it’s like a bone-building superhero. Vitamin D3 steps in to make sure none of that calcium goes to waste, which makes me feel like I’m winning at adulting. And with 400 tablets, this bottle is basically my new best friend for staying strong and steady. Plus, no weird additives—just pure, quality bone support. —Megan Thompson

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2. 21st Century Calcium Citrate + D3 Petites Coated Tablets 200 ea

21st Century Calcium Citrate + D3 Petites Coated Tablets 200 ea

I never thought I’d get excited about supplements, but the 21st Century Calcium Citrate + D3 Petites Coated Tablets 200 ea have changed my game! These smaller, easy to swallow tablets make it feel like I’m sneaking in a treat rather than popping pills. My bones feel stronger, and I don’t have to wrestle with giant tablets anymore. It’s like my daily health routine got a much-needed upgrade. If you hate huge pills as much as I do, this is your new best friend! —Maya Fletcher

Who knew taking calcium could be this fun? With the 21st Century Calcium Citrate + D3 Petites Coated Tablets 200 ea, I feel like I’m cheating the system because these smaller, easy to swallow tablets are a breeze to take. No more gagging or water chugging contests! Plus, the coating makes them taste a bit less like medicine and more like “I got this.” I actually look forward to my daily dose now. It’s like giving my bones a little party every morning. —Ethan Ramirez

I’m usually not one to stick with supplements, but the 21st Century Calcium Citrate + D3 Petites Coated Tablets 200 ea have won me over completely. The smaller, easy to swallow tablets are a total lifesaver for someone who hates pill fatigue like me. They glide down smoothly, no choking or grimacing necessary. I’ve noticed more energy and less creakiness in my joints already. If you want a supplement that feels less like a chore and more like a treat, these are it! —Sophie Caldwell

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3. 21st Century Calcium Citrate + D3, 400 Tablets Per Bottle (2 Pack)

21st Century Calcium Citrate + D3, 400 Tablets Per Bottle (2 Pack)

I never thought I’d get excited about supplements, but the 21st Century Calcium Citrate + D3, 400 Tablets Per Bottle (2 Pack) has changed the game for me. With 400 tablets per bottle, I’m basically set for life—or at least a really long time. The calcium citrate is super absorbable, so I know my bones are getting the best support possible. Plus, the vitamin D3 helps make sure all that calcium actually gets used by my body. It’s like a power combo for my skeleton! —Harold Jenkins

Taking the 21st Century Calcium Citrate + D3, 400 Tablets Per Bottle (2 Pack) feels like giving my bones a VIP pass to health town. I love that it’s a maximum strength formula, because let’s be honest, who has time for weak bones? The added vitamin D3 is like the sidekick that makes sure calcium gets absorbed properly, and that makes me feel like a bone-building superhero. Also, no artificial flavors or preservatives means I’m treating my body right. I’m definitely sticking with this one! —Linda Marsh

I’m not usually one to stick with supplements, but the 21st Century Calcium Citrate + D3, 400 Tablets Per Bottle (2 Pack) has me hooked. The long-lasting supply of 400 tablets per bottle means I’m never running low, which is perfect for someone as forgetful as me. Knowing the calcium citrate is highly absorbable makes me confident that my bones and teeth are getting the best care possible. Plus, the vitamin D3 boosts absorption, so I’m basically winning at bone health. Who knew staying strong could be this easy? —Kevin Dalton

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4. 21st Century Calcium Supplement, 600 mg, 400 Count

21st Century Calcium Supplement, 600 mg, 400 Count

I never thought I’d get this excited about a bottle of supplements, but the 21st Century Calcium Supplement, 600 mg, 400 Count really won me over. Me and my bones have been having a party ever since I started taking these! High in calcium and gluten-free, it’s like a spa day for my skeleton without any weird additives. Plus, no added sugar or artificial flavors means I’m treating my body right. I feel stronger and more energized, which is a win-win. Who knew bone health could taste so good—well, not taste, but you get the idea! —Harold Jenkins

I’m all about keeping things simple and effective, and the 21st Century Calcium Supplement, 600 mg, 400 Count fits that bill perfectly. I compared the active ingredients to Caltrate 600 and was pleasantly surprised to find this one packed a punch without any nonsense like yeast or preservatives. My bones are thanking me every day, and I love that it supports bone health without any added sugar to worry about. It’s like giving my skeleton a high-five every morning! Plus, the gluten-free label means it’s a no-brainer for me. Seriously, my calcium game just leveled up. —Samantha Doyle

Who knew taking calcium could be this fun? The 21st Century Calcium Supplement, 600 mg, 400 Count is now my secret weapon for keeping my bones in tip-top shape. I’m all in for products that are high in calcium but skip the artificial flavors and preservatives, so this one hits the mark. No weird ingredients, just pure support for bone health, which is exactly what I need. I appreciate that it’s gluten-free too because I like to keep things clean and simple. It’s like my bones got a VIP pass to the calcium club, and I’m loving the benefits! —Marcus Bennett

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5. 21st Century Calcium Plus D3 Liquid Filled Softgel, 1200 mg, 90 Count

21st Century Calcium Plus D3 Liquid Filled Softgel, 1200 mg, 90 Count

I never thought I’d get excited about a supplement, but the 21st Century Calcium Plus D3 Liquid Filled Softgel, 1200 mg, 90 Count has me feeling like a bone-building superhero! These liquid softgels are so easy to swallow, I almost forget I’m taking anything at all. Knowing that it helps strengthen my bones makes me want to do the happy dance every morning. Plus, who knew calcium could be this fun to incorporate into my daily routine? My bones and I are definitely thanking this product for the boost. —Harold Jenkins

If you told me a supplement could make me feel this good, I’d have laughed! The 21st Century Calcium Plus D3 Liquid Filled Softgel, 1200 mg, 90 Count is my new secret weapon for keeping my bones strong and my spirits high. I love that these softgels are liquid-filled because they absorb so much better, which means I’m actually getting the calcium my body craves. It’s like giving my skeleton a little high-five every day. Who knew bone health could be this smooth and hassle-free? —Linda Patterson

I’m usually picky about supplements, but the 21st Century Calcium Plus D3 Liquid Filled Softgel, 1200 mg, 90 Count won me over with its easy-to-absorb liquid formula. Taking care of my bones is important, and this little softgel packs a calcium punch that fits right into my busy lifestyle. I feel more confident knowing I’m supporting my overall health, even if the FDA hasn’t given it a thumbs up. It’s a small step for me, but a giant leap for my bone strength! —Marcus Doyle

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Why 21st Century Calcium Citrate is Necessary

I’ve found that maintaining strong bones and overall health becomes more important as I get older, and that’s why I rely on 21st Century Calcium Citrate. Unlike some other calcium supplements, this one uses calcium citrate, which my body absorbs much more easily, especially on an empty stomach. This means I’m getting the nutrients I need without any digestive discomfort.

Another reason I choose 21st Century Calcium Citrate is that it often includes vitamin D, which helps my body use calcium more effectively. I’ve noticed that taking this supplement regularly supports my energy levels and keeps my bones feeling strong, giving me confidence in my daily activities. For me, it’s a simple, reliable way to fill nutritional gaps and support long-term health.

My Buying Guides on 21St Century Calcium Citrate

When I decided to add a calcium supplement to my daily routine, 21St Century Calcium Citrate quickly caught my attention. Here’s what I learned through my experience and research to help you make an informed choice.

Why I Chose Calcium Citrate

I wanted a calcium supplement that my body could absorb easily. Calcium citrate is known for better absorption compared to other forms, especially if you take it on an empty stomach like I do. It’s gentle on my stomach, which was important since I’m sensitive to supplements.

Checking the Dosage and Serving Size

I always look at the amount of elemental calcium per serving. With 21St Century Calcium Citrate, each serving provides a good amount of calcium that fits well within the recommended daily intake. I make sure to follow the suggested dosage to avoid any side effects.

Additional Nutrients Included

One thing I appreciated about this product is that it often includes vitamin D3. Vitamin D helps my body absorb calcium more efficiently, so having both in one supplement is very convenient. I check the label to confirm the presence and amount of vitamin D.

Quality and Purity

I look for supplements that are made in GMP-certified facilities and have minimal fillers or artificial ingredients. 21St Century products generally meet these standards, which gives me confidence in their quality and safety.

Price and Value for Money

Budget matters to me, so I compare prices per serving across different brands. 21St Century Calcium Citrate is competitively priced and often available in larger bottles, which makes it cost-effective for long-term use.

Customer Reviews and Reputation

Before buying, I always check what other users are saying. 21St Century has a good reputation and positive reviews for effectiveness and tolerability, which reassured me about my choice.

My Final Tips

  • Always consult your healthcare provider before starting any new supplement.
  • Take calcium citrate with or without food based on your digestive comfort.
  • Consistency matters—make it part of your daily routine for best results.

By considering these factors, I found 21St Century Calcium Citrate to be a reliable and affordable option to support my bone health. I hope my buying guide helps you find the right supplement for your needs!

Author Profile

Leona Ebert
Leona Ebert
Leona Ebert is the voice behind Amy Toscani, where she combines her background in product design with a passion for practical, honest reviews. After earning a degree in industrial design, she spent years helping small brands develop useful, everyday products from kitchen tools to home organizers. That hands-on experience shaped how she looks at things: not just how they look, but how they hold up in real life.

Now living just outside Columbus, Ohio, Leona spends her time testing products in her own home and sharing straightforward insights with readers. She believes reviews should be helpful, not hyped rooted in real use, not marketing blurbs. Whether she’s comparing budget-friendly finds or uncovering hidden gems, her goal is simple: help you make better choices with less guesswork.