Dietary Supplement Misbranding: What You Need to Know

A misbranded dietary supplement is a product with labeling that is false or misleading in any way.

This may include situations where:

• The label lacks information about the ingredients included in the formula, their quantities, or specific parts of any botanicals used 
• The manufacturer makes false claims about the benefits of the product
• The contents do not meet required standards of identity, strength, quality, purity, or composition
• Required labeling elements (e.g., Supplement Facts panel, net quantity, name and place of business) are missing or incorrect

Under U.S. law, misbranding is a legal term while mislabeling is a subset or cause of misbranding.

A dietary supplement is considered misbranded if its labeling is false, misleading or fails to meet required labeling standards. For example, the product may claim that it can cure a disease or promise that it will result in weight loss.

Mislabeling refers to specific errors on a product label, such as failing to mention the inclusion of certain ingredients, or inaccurate statements about the potency/quantity of ingredients. This means the product is misbranded.

Misbranding can involve various inaccuracies regarding a product’s label or its claims.

• Misleading label
  The product makes claims about its effectiveness or benefits, or implies guaranteed or clinically proven results. This typically obscures or exaggerates what the product is actually capable of.
  
  Examples:
  - A supplement may be labelled “clinically proven to treat anxiety” but lack any clinical evidence or approval.
  - A supplement may claim it contains a highly sought-after ingredient but its quantities are only in trace amounts.
  
  
• Incorrect dosing
  Dosage directions are inaccurate, unsafe or inconsistent with the actual contents.
  
  Examples:
  - The product label and the Supplement Facts panel are inconsistent in their dosing instructions.
  - The recommended daily dosage exceeds the established upper intake levels of certain minerals or vitamins without clear warnings.
  
  
• Omission of ingredients
  The product fails to list all active or relevant ingredients in the formula, including additives that affect safety or efficacy.
  
  Examples:
  - The product contains herbal extracts that are not standardized or the active compounds/plant parts are not specified (e.g., root, leaf, extract)
  - Proprietary blends lack required information, such as the order of ingredients 
  - Fillers, allergens or excipients such as soy, gluten or artificial sweeteners are not listed in the product label.

Tejocote weight loss supplements
In 2023 and 2024 the FDA recalled weight loss supplements that claimed to contain Tejocote (Crataegus mexicana) root, a supplement widely advertised in social media for weight loss. Tests found that some products actually contained yellow oleander, which is highly toxic and can be fatal.¹ A 2024  investigation into commercial weight-loss dietary supplements labelled as candlenut/nuez de la India fruit or seed found most of these supplements contained yellow oleander seed. All were available for purchase online in the US.²

L-tryptophan crisis
In 1989, over 1,500 people developed eosinophilia-myalgia syndrome (EMS), a severe and sometimes fatal condition after taking L-tryptophan. The product was sold as an over-the-counter (OTC) dietary supplement in the US to help with sleep and mood. One manufacturer altered its production process, which introduced toxic impurities into the product. These impurities were not disclosed on the label, and the supplement was marketed as pure L-tryptophan.

At least 30 deaths were directly linked to the supplement and thousands developed chronic neurological and muscular damage. The FDA imposed an immediate ban on L-tryptophan supplements, which lasted until 2005. 

In the US, dietary supplements are regulated by the FDA under the Dietary Supplement Health and Education Act (DSHEA) 1994. Under DSHEA, a dietary supplement is legally defined as a product that may include vitamins, minerals, herbs or other botanicals, amino acids and other substances such as enzymes, extracts, organ tissues or metabolites.³

These products are in a special category of foods (as opposed to drugs), which means manufacturers are not required to provide premarket evidence of product safety and efficacy to the US Food and Drug Administration (FDA).⁴

It should be noted that FDA registration does not necessarily mean a product is FDA-approved or evaluated.

However, if a supplement contains a New Dietary Ingredient (NDI) not marketed in the U.S. before October 15, 1994, the manufacturer must submit a safety notification to the FDA.

Supplements are not completely unregulated but manufacturers must comply with:

Current Good Manufacturing Practices (cGMPs)

• Labeling requirements
• Adverse event reporting
• NDI notification (when applicable)

The FDA also takes action after a product has been sold to consumers. This may occur following an inspection, import alert, reports of adverse events or independent test results.

Although supplements do not require pre-market FDA approval before they are sold to the public, they must meet certain criteria.⁵

Identification 

• Must clearly state “dietary supplement” on the label
• Must name the product type (e.g., vitamin, mineral, herb)

Net quantity of contents

• Amount of product in the container (e.g., number of capsules/tablets, volume of liquid, weight of powder)

Supplement Facts panel (SFP)

• Full list of dietary ingredients in the product. These must be listed in their quantitative amounts along with the % Daily Value (%DV) in the Supplement Facts Panel (SFP) in required units and order.

Other ingredients list

• All non-active ingredients (e.g., fillers, binders, coatings, sweeteners). These must be listed in descending order by weight.
• Food allergens must appear after or adjacent to the ingredient list, under the heading “Contains”.

Name of the company and location

• The manufacturer, packer or distributor of the product must include city, state and ZIP code

Directions for use

• How much of the product to take and how often - e.g, 1 capsule twice per day.

A U.S. mailing address or phone number for serious adverse event reports is also required or the product is misbranded.

Methyl-Life’s® is FDA-registered and audited, uses NSF-certified manufacturers and follows cGMP best practices.

Methyl-Life® adheres to current Good Manufacturing Practices (cGMP) which are standards set by the FDA. These practices encompass rigorous testing, quality control and adherence to standardized procedures during manufacturing, packaging and distribution.

Methyl-Life® also employs rigorous standards beyond basic FDA requirements, including:

• cGMP
  All Methyl-Life® products are made in facilities compliant with current Good Manufacturing Practices (cGMP), which are the FDA's baseline regulations for safety and quality control. cGMP best practices ensure that a facility adheres to FDA regulations and has passed all audits.
  
  
• NSF certification
  Products are manufactured in NSF-certified facilities, which involves additional third-party oversight by the non-profit National Sanitation Foundation to ensure compliance with stringent public health and safety standards.
  (Note: In July 2025, customers were advised to verify their products on the official NSF database following reports of unauthorized use of the NSF mark on certain online product listings)
  
  
• Third-party testing
  Methyl-Life® employs third-party testing to confirm potency and purity of every ingredient used in its products.
  While many companies use ‘skip batch’ testing, Methyl-Life® also performs third-party testing on every batch of finished product. A Certificate of Analysis (COA) is available upon request for each product.