Kirkman® offers calcium capsules with and without vitamin D at the request of physicians. Our Calcium with vitamin D capsule is hypoallergenic and does not contain additives. This product is part of our Bio-Max series that uses forms of nutrients that have clinically proven to be among the best absorbed and most highly bio-available.
Our calcium capsules utilize calcium bis-glycinate amino acid chelate, which has been demonstrated to have superior absorption qualities. The following chart published by Albion® Labs, Inc., the manufacturer of this calcium, shows this by comparing the absorption percentages of different calcium sources:
Reference: Heaney RP, Recher RR, Weaver CM. "Absorbability of calcium sources: the limited role of solubility," Calcif Tissue Int. 46:300-304, 1990.
This form of calcium is not used in our powders because it has an unpleasant taste. For this reason, we suggest that the capsule be swallowed whole and not opened to mix with food. For individuals who cannot swallow the capsule whole, we recommend that they use Kirkmans Calcium with Vitamin D Unflavored Powder hypoallergenic formula.
What is calcium and why might I need more?
Calcium is an essential mineral that your body needs every day. Calcium plays a number of important roles in the body. A deficiency can cause numerous adverse health issues. Calcium is the major constituent of bones and teeth. More than 98% of the bodys calcium is found in those structures. In the rest of the body, calcium supports heart function, circulation, nerve function and muscle tone.
If insufficient calcium results from poor dietary intake, the body can "rob" calcium from the bones to make up the shortage. When this happens, low peak bone mass can result; this means that there will be a low amount of bone mass present at maturity. Low peak bone mass can be a contributing factor to the development of a potentially crippling disease of weak, thin, fragile bones called osteoporosis. More than 25 million people in the United States have this multifactorial disease, which is also affected by race, sex, heredity, body stature, diet, exercise level and lifestyle. Excess alcohol consumption and smoking are also considered risk factors in osteoporosis. Building and maintaining good bone health through adequate calcium intake throughout life is linked to a reduced risk of osteoporosis by optimizing bone mass. Calcium intake exceeding 200% of the recommended daily intake (2000 mg) has no further known benefit.
At what age is calcium intake important?
Very simply, at all ages. Calcium is important to infant development, childhood development when bones are growing, during childbearing and during adulthood to keep bones healthy and strong.
Cant I get enough calcium from my diet?
Infant formulas and some baby foods are rich in calcium, as is breast milk, so babies and infants probably get enough. Once off of those sources, getting enough calcium becomes more difficult. It is generally recognized by the Institute of Medicine of the National Academy of Sciences that from ages four through adult, optimal calcium Dietary Reference Intakes for good health range from 800 to 1200 mg daily. To get that from the diet requires that an individual ingest two to three servings of dairy products per day, plus several servings of protein, vegetables, grains and fruits. This is difficult for many people.
Many individuals are sensitive to dairy products, casein, lactose or other dairy proteins. These individuals find it very challenging to obtain enough dietary calcium.
What affects calcium absorption from my diet?
Fiber-rich foods and plant foods containing phytic acid can negatively affect the absorption of calcium, as can caffeine. Excess fat, salt and soft drinks also have a negative effect.
It is better to spread calcium intake out over the day instead of taking it all at once. Studies show that when too much calcium is in the body at once, absorption is diminished.
Vitamin D increases the absorption of calcium, so it is important to make sure your diet contains sufficient amounts of that nutrient. Vitamin D is stored in the body, so it is not necessary to consume the vitamin D at the same time as the calcium; however, many calcium supplements contain small amounts of vitamin D as a precautionary measure. Older adults without sunlight exposure and with poor diets are most at risk to be deficient in vitamin D.
What kind of calcium supplement should I take?
There are many excellent calcium supplements available on the market. Calcium carbonate and calcium citrate are the most popular sources, with calcium carbonate being by far the most abundant. Both calcium carbonate and calcium citrate are excellent sources and are well-absorbed. The New England Journal of Medicine (1987) reported that these forms of calcium had similar absorption profiles to the calcium found in milk, and these results have been confirmed in subsequent studies.
Calcium carbonate is best absorbed when taken with food. Individuals with the condition achlorhydria (missing stomach acid) seem to absorb calcium citrate better, though the difference is minimized when calcium carbonate is taken with food.
There is one form of calcium that has shown some advantages in absorption properties. The form is known as calcium bis-glycinate chelate, which is produced by Albion® Laboratories Inc., of Clearfield, Utah.
What other quality issues do I need to be concerned about when choosing calcium supplements?
Poor quality calcium supplements may contain a higher lead content than is desirable. The United States Pharmacopoeia (USP) and the Food Chemicals Codex are considered standards for quality materials used in supplements. The lead tolerance in these publications is three parts per million (ppm), an acceptable level to the Food and Drug Administration. Most reputable companies have adopted these standards. It can also be pointed out that several high-quality pharmaceutical grades of calcium are also available that have lead levels far below the 3 ppm accepted standard.
Another issue in quality calcium supplements is disintegration and dissolution standards of the dosage form. A product must dissolve in the body to do any good. Check with your manufacturer to ensure that its calcium products meet USP standards.
Finally, look carefully at the label of the calcium supplement you are thinking about buying. The requirements for calcium intake refer to elemental calcium. Your supplement should be supplying the total amount of the mineral calcium, not an amount of the calcium salt. For example, a supplement should be supplying 600 mg of elemental calcium, not 600 mg of calcium carbonate. If a supplement supplied 600 mg of calcium carbonate, it would only be providing 216 mg of elemental calcium. If in doubt, call the manufacturer. Calcium is too important to your health to have a deficiency.
Can I take too much calcium?
The National Institute of Health and the Journal of the American Medical Association seem to agree that most people can safely consume up to 2000 mg per day of calcium.
Kirkman® manufactures all of its calcium products with pharmaceutical grade, low-lead calcium-containing raw materials. All Kirkman® calcium products are formulated to meet USP specifications for disintegration and/or dissolution for calcium supplements.
Sugar, soy, wheat, casein, gluten, milk, egg, preservatives, yeast, gelatin, flavorings, colorings, peanuts, tree nuts or fish.
STORE IN A COOL DRY PLACE AND TIGHTLY CAPPED.KEEP OUT OF THE REACH OF CHILDREN.
- Orders that are in stock are dispatched daily at 2pm Monday – Friday.
- Orders placed before 2pm Monday to Friday will be dispatched the same day.
- Orders placed after 2pm Monday to Friday will be dispatched the next working day.
- As such, orders placed after 2pm Friday will be dispatched the following Monday.
- Orders will not be dispatched on Bank Holidays or weekends.
For Standard Domestic Orders: We use Royal Mail’s Tracked 48hr delivery service as standard. Royal Mail state a delivery guideline of 1-2 working days for this service, however during busier periods (such as Christmas) this may not always be possible. If your order has not arrived after 2 working days from the date of dispatch please contact us. We have tracking numbers for this service and will be able to assist you in locating your order.
For Expedited Domestic Orders (Next-Day Delivery): Provided that we have received your order by 2pm, we will process and dispatch your order the same day using Royal Mail’s Tracked 24hr delivery service. This service aims to deliver your parcel within 24hrs of the dispatch time – in some instances this may not be possible and delivery may fall within a 48hr period. If you have not received your order after 1 day from the dispatch date please contact us. This is a tracked and insured service and we will be able to assist you in locating your order.
For Standard International Orders: We use Royal Mail International Track (+ Sign), dependent on what the destination country accepts. Royal Mail state a 3-5 working day delivery guideline for this service within Europe, and a 5-7 working day guideline worldwide. However, we have found this is rarely the case outside of major cities, especially during busier periods (such as Christmas) this may not always be possible. This is a tracked and insured service, please contact us if you have not received your delivery within the above stated time-frames and we will assist you in locating your order.
For Expedited International Orders: We are able to offer expedited international shipping worldwide respected couriers. We can use DHL or another courier of your choice, but we are likely to get the best deal from DHL. Please feel free to use the 'Contact Us' form to ask for a DHL quote for your order.
We are able to offer expedited delivery worldwide using various couriers; this is something that we will examine on a case-by-case basis. Please email us and we will investigate your delivery options and let you know what is possible.
If you have selected a shipping method that does not include tracking/insurance then you accept and agree that in the instance that the parcel is lost or delayed, you will not be entitled to a refund or a replacement product, as we will be unable to make a claim for the loss.
We retain proof of postage at all times and reserve the right to use a different shipping method than you have selected in order to give your order added security in certain circumstances (e.g. for extremely high value orders we may upgrade to Courier delivery). In the majority of situations we will respect the customers chosen shipping method. We retain proof of postage for 180 days. After this time it may not be possible to retrieve your proof of postage.