# How can I calculate the daily recommended % value of calcium based on the information I have?

Essentially based on the calcium information I have on these brands of water bottles brands, how can I calculate the daily % value of calcium they give?

Fiji water = 17mg/L Calcium Evian water = 78mg/L Calcium

For calcium it depends on age and gender, as shown in this chart:

So for a male aged 19-50, 1 liter of Fiji water would be:

``````17 / 1000 = .017, or 1.7% of the RDV
``````

And 1 liter of Evian would be:

``````78 / 1000 = .078, or 7.8% of the RDV
``````

In other words, if you're looking for calcium in bottled water, you're looking in the wrong place. It's the most expensive possible source of calcium you could choose and not a very good one.

As Mayo notes:

Your body doesn't produce calcium, so you must get it through other sources. Calcium can be found in a variety of foods, including:

• Dairy products, such as cheese, milk and yogurt
• Dark green leafy vegetables, such as broccoli and kale
• Fish with edible soft bones, such as sardines and canned salmon
• Calcium-fortified foods and beverages, such as soy products, cereal and fruit juices, and milk substitutes

To absorb calcium, your body also needs vitamin D. A few foods naturally contain small amounts of vitamin D, such as canned salmon with bones and egg yolks. You can also get vitamin D from fortified foods and sun exposure. The RDA for vitamin D is 600 international units (15 micrograms) a day for most adults.

Notice that they don't mention water.