Thiamethoxam; Pesticide Tolerances
EPA established a new pesticide tolerance for thiamethoxam on black pepper at 0.15 ppm. This affects dietary supplement manufacturers using pepper ingredients, as they must ensure raw materials comply with the new limit to avoid adulteration under FDA regulations.
Aforeworn detected this change in the Dietary-Supplement Labeling (FDA) space on July 5, 2026 and published this briefing so affected operators are forewarned rather than caught off guard. It is rated Medium urgency. Supplement brands, contract manufacturers, private-label sellers, and ingredient suppliers using black pepper or pepper extracts in dietary supplements. should confirm how it applies to their specific situation before acting. There is a time constraint attached: Compliance required immediately; enforcement begins upon effective date (likely 30 days after publication).. Acting after that point can mean penalties, a lapsed licence, or lost eligibility — exactly the kind of surprise Aforeworn exists to prevent. Aforeworn monitors Dietary-Supplement Labeling (FDA) continuously and turns every detected change into a plain-English briefing like this one, so you always know first. Forewarned is forearmed.
What changed
EPA set a tolerance of 0.15 ppm for thiamethoxam residues on black pepper, effective upon publication.
Who it affects
Supplement brands, contract manufacturers, private-label sellers, and ingredient suppliers using black pepper or pepper extracts in dietary supplements.
What you must do
Verify that black pepper ingredients meet the new tolerance; update supplier specifications and testing protocols.
Deadline
Compliance required immediately; enforcement begins upon effective date (likely 30 days after publication).
Source: https://www.federalregister.gov/documents/2025/12/19/2025-23424/thiamethoxam-pesticide-tolerances
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