If the serving size of 3 grams only contains 630 mg of calcium, what exactly is the other 2370 mg?

It is 100% calcium citrate... so the other 2370 mg is citric acid... if you don't have absorption problems... you should use calcium carbonate... it is cheaper and has a higher percentage of calcium, but since it depends on stomach acid to digest you should take it with food... calcium citrate on the other hand has a lower percentage of calcium, but can easily digest without stomach acid, which it's why it it's recommend after gastric bypass...

How much calcium does 1 tsp powder provide?

The bottle says 1.5 level tsp= 630mg, so 420mg.

Which country is the product manufactured in?

Hi, the manufacturer of this Calcium Citrate is Now foods, and here is the location of their facilities https://www.nowfoods.com/now/about-now/facilities

I want to know if calcium citrate has lead in it? What chemical is in this product that flags prop 65 warning. Will you please inform me of the facts?

I found this answer - Long and short of it is yes and noFood, vitamin and mineral supplements have not been spared from the issues that have cropped up. One supplement can contain several ingredients that are normal and useful in their safe levels but become toxic when multiplied. One ingredient that stands out in the issues of Proposition 65 is lead. Lead in its basic form is not knowingly added to food supplements but it can be found naturally in calcium carbonate. Calcium is one of the more popular mineral supplements that people take. It promotes the growth of healthy bones and teeth in all ages, prevents osteoporosis especially in women, and plays an important role in heart contraction. Pregnant women take calcium for themselves and for the baby they are carrying.A chief source of calcium are oyster shells. These oysters contain lead, taken in from the environment, as with other lead sources. A study that appeared in the Journal of the American Medical Association in September of 2000 revealed that more than half of the products examined had lead levels that were below the detection range of 0.25 ppm and the rest had lead content from 0.35 to 0.81 ppm, still well below the safe limit for lead. Further, calcium blocks lead absorption into the intestines and lessens the toxicity of lead.Standard for lead limit in pharmaceutical products is 10 ppm, according to the US Pharmacopoeia, and this figure has been used as the acceptable safe limit for herbal products and supplements as well. The director for the Institute for Traditional Medicine in Portland, Oregon has set a total daily lead exposure to 0.5 mg as normal in a clean environment. The state of California has set the "no significant risk level" for lead at 0.5 mcg per day.To make matters even better, food supplements that are manufactured in the US were found not to be contaminated with lead. The researchers have attributed this finding to the following factors: the ingredients used did not contain lead, the manufacturing equipments are not contaminated with lead and the water used in the production process is clean and lead-free. The bottom line was simple: the US companies had more stringent processing methods to ensure public health and safety than even the government required.All this information should put worries to rest. Unless a health agency of the government issues an advisory against a specific drug or supplement, the warning label on the bottle is probably not as serious as it sounds. This is not to dismiss the warning outright but rather to make an informed decision and weigh the pros and cons of taking a certain drug, and being better educated about Prop 65.

Manufacturer	NOW FOODS
Country of Origin	USA
Item model number	1240
Product Dimensions	8 x 8 x 15.88 cm; 226.8 g
ASIN	B0006ZF9NC

Calcium Citrate, 8 Oz - Powder

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