This study was part of the Health, Aging, and Body Composition (Health ABC) study initially designed to assess the associations among body composition, long-term health conditions, and mobility in older adults. For Houston’s segment of the investigation, she studied 2788 seniors (mean age:  about 75 years old) for 4 years. At the beginning of the study, they assessed vitamin D status by analyzing each person’s blood for the level of 25-hydroxyvitamin D, a precursor for activated vitamin D. At baseline and then 2 and 4 years later, the research team then determined whether circulating 25-hydroxyvitamin D was related to the participants’ physical function. Specifically, they looked at how quickly each participant could walk a short distance (6 meters) and rise from a chair five times as well as maintain his or her balance in progressively more challenging positions. Each participant was also put through a battery of tests assessing endurance and strength.

When the results were tabulated, seniors with the highest levels of 25-hydroxyvitamin D had better physical function. And, although physical function declined over the course of the study, it remained significantly higher among those with the highest vitamin D levels at the beginning of the study compared to those with the lowest vitamin D levels. The scientists were not surprised to learn that, in general, vitamin D consumption was very low in this group of otherwise healthy seniors. In fact, more than 90 percent of them consumed less vitamin D than currently recommended, and many were relying on dietary supplements.

The good news: a higher circulating 25-hydroxyvitamin D level is related to better physical function in seniors. But it’s impossible to tell from this type of research whether increasing vitamin D intake will actually lead to stronger muscles and preserve physical function. This is partly due to the fact that our bodies can make vitamin D if they get enough sunlight. So, it is possible that the participants with better physical function had higher vitamin D status simply because they were able to go outside more often. Indeed, the ominous “chicken-or-the-egg” question can only be answered by carefully controlled clinical intervention trials. Nonetheless, it is possible that getting more vitamin D from foods (like fortified milk and oily fish) or supplements will help maintain youth and vitality as we enjoy longer lifespans. As Houston points out: “Current dietary recommendations are based primarily on vitamin D’s effects on bone health. It is possible that higher amounts of vitamin D are needed for the preservation of muscle strength and physical function as well as other health conditions. However, clinical trials are needed to definitively determine whether increasing 25-hydroxyvitamin D concentrations through diet or supplements has an effect on these non-traditional outcomes.”

Paying attention to how much vitamin D we get is likely important at every age and will help enhance the “quality” component of life as we enter our senior years (Adapted from Eurekalert).

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Thomas E. Ichim from Medistem Incorporated, USA worked with a team of 13 researchers from industry and academia to further investigate whether this supplement, containing a cocktail of green tea, astralagus, goji berry extracts, ‘good’ bacteria Lactobacillus fermentum, antioxidant ellagic acid, immune enhancer beta 1,3 glucan and vitamin D3, was able to increase the number of stem cells circulating in the blood. They recruited 18 healthy adults aged between 20 and 72 who stopped any other dietary supplements 4-5 days before starting a two-week course of this supplement, taking it twice daily. The researchers took blood from the participants before they started the course and on days 1, 2, 7 and 14 to test for signs of stem cell activity by looking for cells expressing the genetic stem cell markers CD133, CD34 and KDR. They then confirmed whether taking the supplement changed the overall levels of hematopoietic stem cells and endothelial progenitor cells in the blood by using HALO (Hematopoietic Assay via Luminescent Output) and colony forming assays respectively.

Hematopoietic stem cells and endothelial progenitor cells increased after taking the nutritional supplement, suggesting that the supplement may be a useful stimulator for both types of stem cells. In this study, the levels of these stem cells peaked at 2-7 days and started to drop at 14 days, suggesting that this supplement could be used for continuous treatment for conditions associated with decreases in these stem cells such as Alzheimer’s Disease. Other therapeutic treatments used to recruit hematopoietic stem cells are not viable as long-term solutions due to costs and increased health risks caused by the extremely high levels of stem cells that these treatments maintain in the blood.

“To our knowledge, this is the first study demonstrating profound mobilization effect with possible clinical significance by a food supplement-based approach”, say the authors, adding, “Indeed it may be possible that our supplement could be beneficial in conditions associated with reduced progenitor cells such as diabetes or in smokers which possess lower baseline values as compared to controls”. Although they are quick to add, “However, given commercial pressures associated with this largely unregulated field, we propose detailed scientific investigations must be made before disease-associated claims are made by the scientific community” (Adapted from Eurekalert).

A PDF copy of the research article is available online free here:

Nutraceutical augmentation of circulating stem cells in human subjects

Reference: Nina A Mikirova, et al. Nutraceutical augmentation of circulating endothelial progenitor cells and hematopoietic stem cells in human subjects. Journal of Translational Medicine (in press)

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Today’s action follows a formal FDA request to SEI Pharmaceuticals (SEI) on May 27, 2008, to recall the lots of Xiadafil VIP tablets. The products were given away at trade shows and sold in eight tablet bottles (Lot # 6K029) and blister cards of two tablets (Lot # 6K029-SEI) bearing an expiration date of September 2009 (09/09). The company, however, refused to recall these products, making the seizure action necessary to prevent additional, illegal Xiadafil VIP products from entering the marketplace.

The FDA’s chemical analysis of Xiadafil VIP tablets Lots # 6K029/6K029-SEI found that the product contains hydroxyhomosildenafil, which is chemically similar to sildenafil. Sildenafil is the active ingredient in Viagra, an FDA-approved prescription drug for ED. The FDA has not approved Xiadafil VIP for ED or any other drug use, and the safety and effectiveness of this product is unknown. Although offered for sale as dietary supplements, the seized articles are new drugs that may not be introduced into interstate commerce without an approved new drug application filed with FDA.

“Today’s seizure action shows that FDA will take enforcement action to protect the public from dietary supplements that contain prescription drug ingredients that are potentially harmful to consumers,” said Margaret O’K Glavin, associate commissioner of the FDA’s Office of Regulatory Affairs. “FDA will not tolerate a company’s failure to take voluntary action to protect the public health after being given the opportunity by FDA to do so,” she added.

On April 22, 2008, the FDA initiated an inspection at SEI Pharmaceuticals following its analysis of the Xiadafil VIP tablets. The company was advised of the FDA’s findings and informed of the potential adverse health risks the product posed to unsuspecting consumers. The FDA also warned the company of possible legal actions, including seizure and/or injunction if corrective and preventive actions were not implemented. Although the company committed to halting distribution of the product and deactivated its Internet site, it refused to recall the product already in the market.

On May 13, 2008, Florida state officials issued a “stop sale” action at SEI’s distribution facility to keep the illegal product out of the marketplace. This action required SEI to hold, intact, violative Xiadafil VIP tablets found at the facility.

ED is a common problem in men who have diabetes, high blood pressure, high cholesterol, or heart disease. Because they may have been advised against taking ED drugs, men with these conditions may seek alternative products like Xiadafil VIP tablets because they are marketed as “all natural” or as not containing the active ingredients in approved, prescribed ED drugs. Furthermore, because the manufacturing source of the active ingredients in many of these alternative products is unknown, consumers should also be aware that the safety, efficacy, and purity of these ingredients have not been verified by the FDA.

Consumers should discontinue the use of Xiadafil VIP tablets immediately and consult their health care professional if they have experienced adverse events that they believe may be related to the use of this product.

Consumers and health care professionals can report adverse events to the FDA’s MedWatch program at 800-FDA-1088, by mail at MedWatch, HF-2, FDA, 5600 Fishers Lane, Rockville, Md 20852-9787, or online at www.fda.gov/medwatch/report.htm.

Source: FDA

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The seized products, valued at more than $100,000, contain undeclared active ingredients found in FDA-approved prescription drugs for ED, or similar substances. Use of these products may result in serious side effects and may interact in dangerous ways with medications that a consumer may already be taking.

“The FDA will not tolerate companies marketing unapproved drugs — products that have not proven to be safe or effective — as dietary supplements,” said Margaret O’K. Glavin, associate commissioner for regulatory affairs. “The agency will pursue necessary legal action to make sure companies and their executives manufacture and distribute safe drug products.”

The seized products, which originated in China, are packaged and distributed by Shangai Distributors, Inc. of Coamo, Puerto Rico. Although the products’ labels state they are natural supplements, these products are drugs and their sale is illegal without FDA approval. Before a new drug product may be legally marketed, it must be shown to be safe and effective.

In response to a consumer complaint, the FDA conducted an inspection of Shangai Distributors Inc., in November 2007. The FDA’s investigation and testing revealed that the seized products contained active drug ingredients found in FDA-approved ED prescription drugs and/or a substance with a structure similar to such drugs that may cause similar side effects and drug interactions. None of the drug ingredients are listed on the labels of any of the seized products.

The undeclared ingredients in these products may interact with nitrates found in some prescription drugs (such as nitroglycerin) and can lower blood pressure to dangerous levels. Consumers with diabetes, high blood pressure, high cholesterol, or heart disease often take nitrates. ED is a common problem in men with these medical conditions. Because they may have been advised against taking ED drugs, they may seek out products like these because they are marketed as “all natural” or as not containing the active ingredients in approved, prescribed ED drugs. Additionally, because the manufacturing source of the active ingredients in these products is unknown, consumers should be aware that the safety, efficacy, and purity of these ingredients can not be validated.

Despite being advised of the findings and the potential adverse health risk posed by the seized products and that regulatory action was possible, the company did not take any action to correct the violations. The FDA issued a press release on December 28, 2007 advising consumers not to buy or use the products. Prior to the seizure, the Puerto Rico Department of Health embargoed the seized products to protect the citizens of Puerto Rico and to support the FDA’s enforcement actions.

The FDA advises consumers who have used any of these products to discontinue use and consult their health care providers if they have experienced any adverse events that they believe are related to the use of these products. Consumers and health care professionals can report adverse events to FDA’s MedWatch program at 800-FDA-1088 or online at www.fda.gov/medwatch/report.htm. FDA recommends that consumers talk to their health care provider about FDA-approved treatments for erectile dysfunction. FDA may take further regulatory actions to protect consumers from these illegal products.

The complaint was filed by Assistant U.S. Attorney Jose M. Pizarro, deputy chief, Civil Division, United States Attorney’s Office, District of Puerto Rico.

Source: FDA

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The dietary supplements seized were marketed and distributed on-line and in retail stores under the names “Methyl 1-D,” “Methyl 1-D XL,” and “Formadrol Extreme XL.”

The seized products previously were tested and found to contain one or more unapproved food additives and/or new dietary ingredients for which there is inadequate information to provide reasonable assurance that the ingredients do not present a significant or unreasonable risk of illness or injury.

“The FDA takes seriously its responsibility to protect Americans from unsafe dietary supplements,” said Margaret Glavin, FDA’s Associate Commissioner of the Office of Regulatory Affairs. “Wednesday’s action shows FDA’s commitment to protecting consumers from potentially harmful products.”

“Working with the FDA, we are taking prompt civil action to protect the public health by seizing these illegal products and forestalling their shipment into the stream of commerce in any manner that could create harm to the public,” said U.S. Attorney Stephen J. Murphy. “I commend the professionalism and swift action of the FDA investigators who discovered and investigated this serious problem, and I am glad our lawyers could provide the legal muscle needed to support the seizure.”

FDA has not received scientific information on the safety of the seized products and cannot determine, at this time, whether they represent a hazard to consumers. Therefore, consumers who still have the products should strongly consider discussing the use of these products with their health care professionals. FDA also recommends that consumers consult their health care professionals if they have experienced any adverse events that they suspect are related to the products’ use. Consumers and health care professionals can report adverse events to the FDA’s MedWatch program at 800-FDA-1088 or online at www.FDA.gov/medwatch/report.htm.

On March 2006, the FDA warned Legal Gear (the predecessor of LG Sciences) to cease distribution of a different product that was marketed as a dietary supplement but was actually an unapproved new drug containing synthetic steroids.

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