February 20, 2017

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Lance Fontenot and Valerie Mayhall at the Louisiana Solid Waste Association Annual Conference

Lance Fontenot (Louisiana) will deliver a presentation entitled "Safety of Dietary Supplements: A Toxicological Perspective," during the Louisiana Environmental Health Association track, at the 2017 Louisiana Solid Waste Association (LSWA) Annual Conference in Lafayette, Louisiana on March 15 - 17, 2017.

Valerie Mayhall (Louisiana), as part of the LSWA Conference Steering Committee, has been actively involved in the planning and execution of the annual conference. She is a Senior Scientist based in Louisiana with more than 20 years of experience focused on environmental permitting and compliance in the areas of air, water, and waste. Valerie has extensive project management and technical experience working for entities in the industrial, municipal, and utility sectors.

The annual LSWA conference is well attended by industry leaders in Louisiana who practice in the solid and hazardous waste, utility, and industrial manufacturing and petrochemical sectors. Regulators from the Louisiana Department of Environmental Quality and the Louisiana Department of Natural Resources, as well as from the United States Environmental Protection Agency are slated to attend and/or present at the conference.  Numerous trade association representatives and attorneys are also expected to attend. As a networking event, the conference also includes a well-attended crawfish boil.

The LSWA was chartered on June 10, 2004, by a group of professionals dedicated to providing training and continuing education for the industry.  The LSWA board of directors consists of solid waste professionals from various sectors of the industry, including solid waste collection and disposal, recycling, regulatory, engineering and design, and governmental. This group of professionals guides the LSWA training and education efforts, in order to maintain the highest standards of solid waste management throughout the Louisiana waste industry.


Dietary supplements are products which contain one or more dietary ingredients such as vitamins, minerals, herbs or other botanicals, amino acids or other ingredients used to supplement the diet. Approximately half of the U.S. population takes dietary supplements, typically a multi-vitamin or common single nutrient supplements such as vitamin C. Although dietary supplements fall under the jurisdiction of the Food and Drug Administration (FDA), they are not directly tested by the FDA and are treated differently than other food and drugs. The Dietary Supplement Health and Education Act (DSHEA) of 1994 established the framework for FDA regulation of dietary supplements. In 2007, FDA passed new Good Manufacturing Practice regulations which ensure that supplements meet certain sanitary standards and are labeled truthfully with respect to identity, purity, strength, and composition. Unlike drugs which require pre-market approval, the FDA must prove that supplements are dangerous before they can be removed from the market. Although adverse effects may be associated with interactions with other supplements or drugs and adulteration contamination of supplements, this presentation will focus on the inherent toxicity of supplements. Large doses of supplements may be toxic. Safe doses for common vitamin and mineral supplements may be determined using dietary reference intake (DRI) Tolerable Upper Intake Levels. However, many supplements do not have an established DRI and little research is available on their safety. Using established scientific risk assessment procedures, safe upper levels of intake have been published for some common supplements. A summary of these safe upper levels of intake will be presented. Additionally, the National Toxicology Program (NTP) recently initiated a program to evaluate the toxicity of botanical derived dietary supplements including chronic 2-year studies on some popular herbals such as Ginseng, Green Tea extract, and Gingko biloba. A summary of the results from these chronic studies will be presented along with some concerns raised about the testing methodology.

More Information

For more information regarding the event, visit: LSWA Environmental Conference
For more information on environmental consulting, contact Lance Fontenot at This email address is being protected from spambots. You need JavaScript enabled to view it..
To learn more about Lance see his profile at: http://www.geosyntec.com/people/lance-fontenot
To learn more about Valerie see her profile at: http://www.geosyntec.com/people/valerie-lege-mayhall