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6 Best Calcium Supplements for Stronger Bones and Teeth (at Every Age)
Written By Natalie Wilkinson
If you didn’t get enough calcium in your 20s and 30s, it’s true that you can’t fully reverse the bone loss that may have occurred. But here’s the good news: it’s never too late to protect the bone mass you still have.
Do you get the 1,000 milligrams of calcium your body needs every day? Three glasses of milk are equivalent to only 900 milligrams
You won’t notice the silent danger of low calcium. No red flags. No alarms going off. But what’s happening under the surface is that your body is quietly pulling calcium from your bones to keep other functions going. This hidden threat leaves your bones weaker and more vulnerable over time.
When you hit your 50s or 60s, you drastically increase your risk of osteoporosis or devastating fractures. So, what’s the right call? Don’t wait for the painful consequences; get ahead of them now. With a 4.6-star rating—and over 6,000 bottles flying off the shelves this month—we voted the Nature’s Bounty Calcium Supplement best overall out of six top supplements.
6 Best Calcium Supplements of 2025
Nature’s Bounty Calcium Supplement
Best Overall
I prefer getting my daily calcium through food. But the reality is, I tried this for years and failed. Three or four glasses of milk a day (every day!) is a lot. That’s when I found the Nature’s Bounty Calcium Supplement. It’s the #1 best-seller in calcium supplements for a reason, with over 28,000 glowing reviews and a rock-solid 4.6-star rating.
Each softgel gives you 600 milligrams of calcium. It also includes 1000 IU of vitamin D3 to help your body absorb the calcium. In terms of how long a bottle will last, one bottle has 120 softgels, and you get two bottles in a pack. You need one to two softgels per day, depending on your calcium needs. I only take one softgel daily (600 milligrams) because I get about 400 milligrams of calcium from my food. At about $17 for two bottles (as of this writing), it’s way easier (and cheaper) to take one pill than drinking milk all day long! We voted this supplement best overall for its effectiveness, high star rating, and golden customer reviews.
Yoli Alkalete Calcium Supplement
Runner-Up
For the runner-up, we have something a little different. The Yoli Alkalete Calcium Supplement isn’t just about calcium; it also brings magnesium and potassium into the mix to keep your body balanced. Seventy-four percent of customers give it a 5-star rating, and it’s the runner-up for a reason.
If you’re looking to neutralize excess acid and keep your pH levels in check, this supplement delivers. Each capsule gives you a unique, patented blend of calcium, magnesium, and potassium. These not only support your bones and muscles but also help with heart health and even boost hydration. The best part? The formula is time-released, so you get benefits throughout the day—perfect for muscle recovery after a workout or keeping your energy up. Plus, if your diet lacks pH-balancing minerals, this supplement might be exactly what your body’s been missing. At $50 for 60 capsules (as of this writing), it’s definitely pricier than the best overall. But if you’re after a supplement that tackles more than just bones, this could be the one for you.
Nature Made Calcium Supplement
Budget-Friendly Pick
Sometimes two supplements appear identical, but one may be more affordable or have an essential ingredient you prefer. Each person is different, and everyone has different needs. Our third pick—the Nature Made Calcium Supplement—is on par quality-wise with our best overall and runner-up.
Ingredients-wise, each tablet contains 600 milligrams of calcium and includes vitamin D3 to boost calcium absorption. Moreover, with 220 tablets in one bottle, this supplement gives you up to a generous seven-month supply for about $11 (as of this writing). That’s incredible value! Also noteworthy, it’s USP Verified, meaning its quality and potency are rigorously tested and trusted. Take one or two tablets daily depending on your needs.
Garden of Life Calcium Supplement
Best Plant-Based Option
The source of calcium in the Garden of Life Calcium Supplement is AlgaeCal Raw, a certified organic calcium derived from marine algae. Essentially, this plant-based calcium supplement skips the typical limestone or animal bone sources, focusing on raw algae.
In addition to 1,100 mg of calcium per serving, you’re getting 357 mg of magnesium to supercharge muscle and nerve function, along with vitamins K2, D3, and C to fortify bone strength and boost immune health. It also contains live probiotics and digestive enzymes like lipase and lactase. A bottle comes with 60 capsules, and if you take two a day (550 milligrams of calcium), you’ll have a 30-day supply. You can easily meet the remaining 450 milligrams of calcium through your diet.
21st Century Calcium Supplement
Great Value
Ah, finally—a calcium supplement that doesn’t contain vitamin D3 and only contains calcium as its active ingredient. The 21st Century Calcium Supplement has a solid 4.7-star rating and is the ultimate budget-friendly choice. Each tablet contains 600 milligrams of calcium, and with 400 tablets in a single bottle, you’re looking at a seriously cost-effective pick at just $0.02 per tablet. Moreover, it’s free from added sugars, preservatives, yeast, and artificial flavors. Plus, it’s gluten-free, so it works for various dietary needs.
If you don’t need extra vitamin D3 or magnesium in your diet, this supplement keeps it straight to the point—just what you need for your bones.
Nutricost Vitamin D3
Best for Calcium Absorption
Our last supplement is not a calcium supplement, but without it, your body may struggle to absorb calcium effectively. Nutricost Vitamin D3 delivers 5,000 IU of vitamin D3 per softgel, which is essential for supporting calcium absorption and promoting bone health. Without enough vitamin D3, even the best calcium supplement won’t work as efficiently. Moreover, vitamin D3 isn’t just important for calcium absorption. It also plays a role in supporting immune function and overall health.
This brand’s formula has earned an impressive 4.8-star rating from over 2,400 customers. In fact, more than 4,000 bottles were sold this month. Each bottle comes with 240 softgels, giving you a reliable, long-term supply to ensure your vitamin D levels stay optimal.
Choosing the Best Calcium Supplement: A User's Guide
Many People Get Confused About When and Why to Take a Calcium Supplement
The reality is, calcium is essential for everyone, but not everyone gets enough from their diet alone.
Let’s break it down by age. Adults between 19-50 years old need about 1,000 milligrams of calcium per day, while women over 51 and men over 71 need around 1,200 milligrams. Teens and younger adults, especially ages 14-18, require 1,300 milligrams daily since their bones are still growing.
Moreover, maybe you avoid dairy, whether due to lactose intolerance or preference. Without enough calcium-rich foods like milk or cheese, your bones may not get the support they need. That’s when a supplement becomes essential.
Likewise, as we age, calcium absorption naturally decreases, especially for women who face higher risks of bone loss. Nature’s Bounty helps keep bones strong and muscles functioning as you age.
Ultimately, if your diet isn’t perfect, a calcium supplement can fill those gaps. Even with the best intentions, it’s tough to eat perfectly every day.
Adequate vs. Deficient Calcium Intake for a 17-Year-Old Teen
| Calcium Intake | Breakfast | Snack | Lunch | Snack | Dinner |
| 1,300 mg (Adequate intake through food only) | Greek yogurt (200 mg) | Almonds (50 mg) | Grilled cheese sandwich (300 mg) | Orange (50 mg) | Salmon with broccoli (700 mg) |
| 700 mg + 600 mg (Adequate intake through food and supplementation) | Oatmeal with milk (250 mg) | Ramen (10 mg) and Calcium supplement softgel (600 mg) | Turkey sandwich (90 mg) | Fortified cereal (300 mg) and Carrot sticks (0 mg) | Chicken with green beans (50 mg) |
| 300 mg (Deficient) | Eggs on toast with butter (100 mg) | Apple (0 mg) | Rice and beans (50 mg) | Chips (0 mg) | Steak with salad (150 mg) |
The Best Overall Calcium Supplement
1. Nature’s Bounty Calcium Supplement
Best Calcium Supplement for Strong Bones and Teeth
Why Choose It?
- Solid 4.6 rating out of 5 stars
- 80% of customers give it a 5-star rating
- Provides 1,200 mg of calcium per serving for bone health
- Includes 1,000 IU of vitamin D3 to enhance calcium absorption
- Voted “best overall” by the Supplement Institute review team
7 Things You Need to Consider When Choosing a Calcium Supplement
1. Calcium Type
Calcium supplements typically come in two forms: calcium carbonate and calcium citrate.
- Calcium Carbonate: This is the most common form and tends to be more affordable. However, it is best absorbed when taken with food.
- Calcium Citrate: This is more easily absorbed and can be taken on an empty stomach. It’s often recommended for people who have digestive issues.
For instance, our best overall choice, the Nature’s Bounty Calcium Supplement, provides 600 milligrams of calcium carbonate per softgel, ensuring effective absorption when taken with meals.
2. Vitamin D
Vitamin D plays a crucial role in helping your body absorb calcium efficiently. If you don’t get enough sunlight or consume foods rich in vitamin D, choosing a supplement that includes it can make a significant difference. Of course, the Nature’s Bounty Calcium Supplement also contains 1,000 IU of vitamin D3 to enhance calcium absorption.
On the other hand, the runner-up, Yoli Alkalete Calcium Supplement, focuses on pH balance and muscle recovery, providing calcium and magnesium.
3. Dosage
Ensure that the supplement meets your daily calcium requirements. Adults generally need around 1,000 milligrams of calcium per day. However, keep in mind that you’re likely getting some calcium from your diet.
Nature’s Bounty and Yoli Alkalete both offer flexibility: Nature’s Bounty offers 600 milligrams per softgel, while Yoli Alkalete provides a calcium-magnesium blend.
4. Number of Tablets or Capsules
Pay attention to how many tablets or softgels you need to take daily. Nature’s Bounty requires one or two softgels per day, depending on your needs.
5. Additional Ingredients
If you’re looking for more than just calcium, consider a supplement that includes additional ingredients for broader health benefits. Yoli Alkalete stands out for including magnesium and potassium, which not only support bone health but also help with muscle recovery and hydration, making it a great option for active individuals.
6. Price and Value
Price is always a consideration, but so is value. With 220 tablets in a bottle for around $17, Nature’s Bounty Calcium Supplement provides excellent value. Of course, Yoli Alkalete, priced higher at around $50 for 60 capsules, offers benefits beyond basic calcium supplementation, which may justify the higher cost depending on your needs.
7. Dietary Restrictions
Always check the label to ensure the supplement meets your dietary needs. Both Nature’s Bounty and Yoli Alkalete are gluten-free and free of artificial flavors, making them suitable for a wide range of dietary preferences.
Calcium Supplement FAQs
Do I have to take a calcium supplement?
Not necessarily. If you're getting enough calcium from food (around 1,000-1,200 milligrams daily), you might not need a supplement. But a supplement can help fill the gap if your diet falls short. It's about making sure your bones stay strong as you age. Personally, I take a calcium supplement and a collagen supplement daily. I also take a quality green tea extract for the benefits of green tea without the taste.
Which foods are the highest in calcium?
Dairy products like milk, yogurt, and cheese are great sources. Leafy greens like kale and spinach also pack in calcium. Other foods include almonds, tofu, and fortified cereals.
Why is vitamin D3 important?
Vitamin D3 helps your body absorb calcium more effectively. Without it, even if you're getting enough calcium, your body might not use it efficiently. Plus, you don't want to develop a Vitamin D deficiency.
What are some sources of vitamin D3?
Here are some common sources of vitamin D3:
- Sunlight: Your body produces vitamin D3 when your skin is exposed to sunlight.
- Fatty fish: Salmon, mackerel, and tuna are excellent sources.
- Egg yolks: A convenient source of vitamin D3 if you eat eggs regularly.
- Fortified foods: Milk, orange juice, and cereals often have added vitamin D3.
Which calcium supplement is the best?
The Nature’s Bounty Calcium Supplement is the best overall for its 1,200 mg of calcium and added vitamin D3. If you’re looking for something with extra benefits, the Yoli Alkalete Calcium Supplement is a great runner-up. Both are highly rated and effective. It depends on your personal needs.
Is it too late to start taking a calcium supplement in your 40s?
No, it's definitely not too late! In fact, many people start paying more attention to bone health in their 40s as calcium absorption naturally decreases with age. Taking a supplement now can help maintain strong bones and prevent issues later on. It's always a good time to support your bone health.
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