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The quality, purity and safety of our products is of utmost importance to Rainbow Light. We have rigorous standards and processes in place to ensure careful selection of suppliers, tests of inbound materials and finished goods testing, in compliance with GMPs (Good Manufacturing Processes).

As the pioneer of natural food-based nutritional supplements, Rainbow Light has always been committed to the vibrant health of people, our communities and our planet. In our continued pledge to provide wholesome ingredients grounded in the wisdom of nature, Rainbow Light is an active member of the Non-GMO Project. As a contributing member, we’re working with our suppliers, The Non-GMO Project’s technical advisors and other brands within the industry to ensure transparent labeling, and to ultimately create a balanced, wholesome food system that’s GMO-free. For more information on the Non-GMO Project’s Product Verification Program see:

We take great pride in providing high quality, safe products to our customers. All of our tablets, capsules, softgels, gummies and powders are manufactured in compliance with Good Manufacturing Practices(GMPs) set forth by the FDA. GMPs are related to the manufacturing, packaging, labeling or holding of dietary supplements. Manufacturers are required to evaluate their products’ identity, purity, strength and composition. Other requirements deal with such matters as quality control, the design and construction of manufacturing plants, record keeping and consumer complaints.

The quality, purity and safety of our products is of utmost importance to Rainbow Light. We have rigorous standards and processes in place to ensure careful selection of suppliers, tests of inbound materials and finished goods testing, in compliance with GMPs (Good Manufacturing Processes).

The oils used in Rainbow Light products are purified by way of molecular distillation, which utilizes a low heat enzymatic process to remove any naturally occurring contaminants. Our oils also meet the standard for the GOED (Global Organization for EPA and DHA Omega-3s) monograph, which are held to a higher standard than the many commonly used oils when it comes to the PCB and other POP (persistent organic pollutants).

Lead is a naturally occurring mineral found in the water, soil, and air, as well as many every day foods and botanicals.

Proposition 65 is a portion of the California Health and Safety Code that regulates a variety of chemicals, including lead. Proposition 65 has established a "No Observable Effect Level" for lead, which is lower than the FDA's safety/tolerable level.

Rainbow Light regularly tests its products to ensure that any naturally occurring lead levels are within the FDA's and Proposition 65's safety levels. Rainbow Light uses botanical materials with the lowest detectable lead level available on the market and utilizes strict testing methods to ensure continued compliance with these requirements.

There has been extensive research into toxic levels of vitamin A; the risk for toxicity is related to pre-formed Vitamin A and retinyl esters and not pro-formed Vitamin A or Beta-Carotene. A summary of the research to date shows that potential adverse effects of Vitamin A have been identified at levels <25,000 IU. 8,000 IU is the recommended maximum level during pregnancy and is what the %Daily Value for pregnant women is based upon. The Food and Nutrition Board evaluated all available studies in 2001 and concluded that a suitable Upper Level in relation to birth defect risk is 10,000IU.1 A few key studies evaluating vitamin A toxicity are summarized below:

A study in the NEJM in 1995, found that among women who take more than 10,000 IU of supplemental vitamin A, an estimate of 1 in 57 involves a baby with a birth defect attributable to high vitamin A intake.2 A study from the journal Reproductive Toxicology in 1998 showed daily exposures greater than 25,000 IU/day have not been sufficiently studied to establish a specific risk. If exposure levels up to 30,000 IU/day occur unintentionally, multiple animal studies show only a very low risk. Doses of 10,000 IU/ day or less are considered safe.3 The American Journal of Clinical Nutrition in 1989 reported incidences of vitamin A toxicity are rare and have averaged fewer than 10 cases per year from 1976-1989 and that deficiency of vitamin A is much more common.4

Rainbow Light’s Prenatal One™ contains a total of 4,000 IU of vitamin A activity, 50% beta-carotene and 50% palmitate. Complete Prenatal System™ contains 5,000 IU also 50% beta-carotene, 50% palmitate. Beta-carotene provides vitamin A activity by converting to vitamin A only as metabolically necessary, further safeguarding against any possibility of toxic levels. (for more information see FAQ- “Vitamin A vs. Beta-carotene”) The vitamin A potencies offered in both of these products are safely below the recommended maximum level of 8,000 IU, and are intended to protect against deficiency for optimal fetal development and maternal health.

1 Food and Nutrition Board. Dietary reference intakes for vitamin A, vitamin K, arsenic, boron, chromium, copper, iodine, iron, manganese, molybdenum, nickel, silicon, vanadium and zinc. Washington, DC: National Academy Press, 2001. 2 Rothman KJ, et al. Teratogenicity of high level vitamin A intake. N Engl J Med 1995; 333:1369-73. 3 Miller RK, et al. Periconceptional vitamin A use: how mch is teratogenic? Reprod Toxicol. 1998;12(1); 75-88. 4 Bendich A & Langseth L. Safety of vitamin A. Am J Clin Nutr. 1989 feb; 49(2): 358-71.

Color variations are common in natural products. While Good Manufacturing Practices are employed at every level of production, including use of a “standardized recipe”, on occasion an herbal ingredient will have a color or taste variation due to seasonality, growing conditions etc. Some of Rainbow Light’s approved food and herbal ingredients are sourced from local farmers and are either Certified Organic or wild-harvested. A quality assessment is performed on each supplier and all materials are sampled and undergo a thorough inspection before being used in our products to ensure that these variations do not impact the overall quality of the finished product.

The many variables of calcium absorption complicate interpretation of calcium absorption studies1,2 Some evidence suggests that calcium citrate, citrate malate, aspartate, amino acid chelate and heated oyster shell-seaweed calcium are absorbed better than calcium carbonate, while other research indicates similar bio-availability 3, 4. Despite many claims for the superiority and bioavailabality of one form of calcium over another, there are surprisingly few conclusive studies proving one form over another. Citrate, citrate malate and aspartate do readily ionize during digestion and don’t require normal HCl production for ionization as carbonate does.5 Calcium amino acid chelate is absorbed in the small intestine and also does not require HCl for ionization and absorption. Evidence shows that when taken with meals absorption of calcium salts is almost identical in people with normal HCl production. In those with weakened HCl production, look for a calcium supplement with added Betaine HCl.

It is a well-known fact that calcium absorption varies with age, environmental and dietary conditions, and race. In healthy premenopausal women, the proportion of dietary calcium absorbed varies from 10% to 60%, and is positively correlated with body mass index, dietary fat, and serum vitamin D level.6 It is inversely correlated with total dietary calcium, dietary fiber, alcohol intake, and physical activity. There is a link between a low fat, high fiber diet and poor calcium absorption, possibly due to a faster rate of intestinal transit.

1 Power ML, Heaney RP, Kalkwarf HJ, et al. The role of calcium in health and disease. Am J Obstet Gynecol 1999;181:1560-9.Am J Obstet Gynecol 1999;181:1560-9

2 Heller HJ, Poindexter JR, Adams-Huet B. Effect of estrogen treatment and vitamin D status on differing bioavailabilities of calcium carbonate and calcium citrate. J Clin Pharmacol 2002;42:1251-6.J Clin Pharmacol 2002;42:1251-6.

3 Heller HJ, Stewart A, Haynes S, Pak CY. Pharmacokinetics of calcium absorption from two commercial calcium supplements. J Clin Pharmacol 1999;39:1151-4.J Clin Pharmacol 1999;39:1151-4

4 Fujita T, Ohue T, Fujii Y, et al. Heated oyster shell-seaweed calcium (AAA Ca) on osteoporosis. Calcif Tissue Int 1996;58:226-30.Calcif Tissue Int 1996;58:226-30

5 Heller HJ, et al. Pharmacokinetic and pharmacodynamic comparison of two calcium supplements in postmenopausal women. J Clin Pharmacol 2000; 40 (11):1237-44.

6 Wolf RL, Cauley JA, Baker CE, et al. Factors associated with calcium absorption efficiency in pre- and perimenopausal women. Am J Clin Nutr 2000;72:466-71.Am J Clin Nutr 2000;72:466-71

Epidemiological studies show that excessive levels of vitamin A, from either dietary or supplemental sources, has the potential to interfere with cells that produce new bone, stimulate cells that break down old bone and can interfere with the action of vitamin D, which helps the body maintain normal calcium levels.1 At the time of this publication, governing bodies reviewed all available evidence and found insufficient scientific support for changing the Upper Level of vitamin A. Supplemental levels of less than 5,000IU have not shown any detrimental effect on bone.

Some health care providers may advise consumers to be cautious about potential toxicity issues when using products containing vitamin A. Vitamin A is a safe and essential nutrient provided at less than 5,000IU in all Rainbow Light vitamin A containing products. The average intake from sources other than supplements is likely to be less than 3,400IU.1 So realistically there is very little risk of coming close to even the UL by combining a Rainbow Light supplement with the average American diet. In addition, Rainbow Light products often employ a combination of pre-formed vitamin A with beta-carotene, which is only converted to Vitamin A in the body as needed. (for more information see FAQ- “Vitamin A vs. Beta-carotene”) Keeping this in mind, Rainbow Light will continue to review the research and will reassess the current levels of vitamin A provided in our products if deemed scientifically rational.

1 Feskanich D, et. al. Vitamin A intake and hip fractures among postmenopausal women. JAMA. 2002; 287: 47-54.

The best time to take any supplement is when you remember to take it. Regular use is an important factor in determining whether a supplement will work for you. Rainbow Light’s supplements are very gentle on the stomach and can therefore be taken at any time with or between meals. Some experts recommend taking any supplement with a meal, when your digestion is most active, for maximum absorption and to lessen the possibility of gastrointestinal upset.

Tablets produced according to Good Manufacturing Practices's (GMP’s) adhere to USP (United States Pharmacopoeia) disintegration guidelines. These standards require that coated tablets disintegrate within a set amount of time following ingestion and take into consideration that there are many physiological factors impacting disintegration times.

Rainbow Light’s laboratory utilizes the USP disintegration test to ensure our tablets will dissolve in the gastrointestinal(GI) tract allowing the nutrients to be available for absorption. This procedure is carried out in an apparatus that mimics the actions of the GI tract during digestion. USP defines complete disintegration as “that state in which any residue of the unit, except fragments of insoluble coating or capsule shell, remaining on the screen of the test apparatus, is a soft mass having no palpably firm core.” The approved procedure utilizes specific apparatus and methods, and is slightly different for uncoated (30 minutes), film-coated(30), plain coated(45), hard gelatin(45) and soft gelatin capsules(45).

“Table top” methods involving vinegar and other acids are not a reliable test for determining disintegration. Simply dropping a tablet in a glass of water or vinegar solution does not properly simulate the temperature, pH conditions, and movement of the stomach and GI tract during digestion. The vinegar test is only appropriate for formulas that contain just calcium carbonate, and is not appropriate for food-based supplements-after all, you can't dissolve a piece of food in a glass of vinegar!

In 2005, Rainbow Light expanded our product line to include gummies, which are manufactured by our affiliate confectionery company Alinova, located in Colombia, South America. Alinova’s highly skilled technical management has 35 years of hands-on experience, and has been producing and exporting gelatin-based gummies from their Bogota facility since 1999. Currently, they export to the United Kingdom, Europe, Canada, Singapore, Peru, Venezuela and the United States.

Alinova is in full-compliance with Colombian food production regulations as well as specific requirements for exportation to other countries. Alinova follows the same GMP practices as US based food manufacturing facilities, and conforms to two of the highest global quality assurance programs for food safety and manufacturing: GFSI (Global Food Safety Initiative) and HACCP (Hazard Analysis and Critical Control Point). Rainbow Light thoroughly inspects and tests each batch of product prior to release into distribution.

Food-Grown refers to a specific process of creating a food-like substance starting with a live culture of nutritional yeast, called Saccharomyces cerevisiae, which is combined with a USP vitamin or mineral in a stainless steel tank, along with a nutrient specific broth, such as alfalfa extract for vitamin K, citrus extract for vitamin C, and carrot extract for beta-carotene. The yeast feeds on these nutrients and transforms them in to a food-like matrix. At the end of the procedure, the yeast is sprayed with proteolytic enzymes to stop its growth process.

Rainbow Light was one of the first companies to provide a food-grown product over 20 years ago, and the term “food-grown” is our trade-marked name. While Rainbow Light still offers food-grown choices to our customers, we have decided to focus on manufacturing food-based products (which are a combination of USP vitamins and minerals with superfoods and herbs) for the following reasons:

  • The potencies of food-based supplements are significantly higher than food-grown because the final food-grown material is very bulky and creates large and expensive tablets. In order to have therapeutic quantities of nutrients in food-grown products, more USP nutrients would have to be added to the final mixture, creating a tablet that would be too large to swallow.
  • Food-based formulas not only have much higher potencies of nutrients, they also are much less expensive than food-grown products. Food-based supplements are more shelf stable throughout manufacturing and distribution.
  • Although Saccaromyces cerevisiae is a beneficial yeast and is safe for most people to consume, there are some very sensitive customers that would do better with a yeast-free product. Rainbow Light’s food-based vitamins are yeast-free.

Rainbow Light strives to provide the highest-quality ingredients in all formulations which allows us to uphold our commitment to environmental and human health concerns. We formulate all of our supplements to contain raw materials which are non-GMO, whenever possible.

Additionally, Rainbow Light has several products enrolled with the Non-GMO project and our values closely align in that we believe everyone deserves an informed choice about genetically modified organisms.

Rainbow Light’s label guarantee complies with the allergen labeling law called FALCPA (Food Allergen Labeling and Consumer Protection Act) that went into effect 1/1/06. If a product contains any ingredients which are derived from milk, egg, fish, crustacean shellfish, tree nuts, wheat, peanuts, and soybeans, it is clearly labeled.

The law does not mandate advisory statements such as if it is manufactured in a facility using one of the allergens. Gluten labeling is not mandated by FALCPA, but Rainbow Light includes a gluten-free reference in our guarantee unless trace amounts of gluten are present. Yeast is also not mandated as an allergen, but Rainbow Light’s guarantee does include yeast as customers frequently inquire about it.