Where do your supplements actually come from? U.S. import data can show which countries supply specific ingredient categories—but it cannot identify the complete origin or manufacturing history of a vitamin bottle on a store shelf. In 2024, the leading source by trade value differed between two unmixed-vitamin categories: Switzerland led for vitamin A and derivatives, while China led for other vitamins and derivatives.
What U.S. import data can tell you
The U.S. International Trade Commission’s DataWeb provides access to official import and export statistics published by the Census Bureau. You can query by product classification, trading partner, time period and measures such as trade value or quantity. USITC DataWeb overview
For questions about products and countries of origin, USITC identifies general imports as the appropriate measure. It counts the total physical arrivals of merchandise from foreign countries. USITC DataWeb data request
These statistics describe goods classified for trade purposes. They are not a direct inventory of retail products, and their dollar values are trade values—not retail sales or what consumers spent.
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Two vitamin categories show different source patterns
The table compares U.S. imports in 2024 for two six-digit Harmonized System (HS) classifications. WITS presents values in thousands of U.S. dollars and quantities in kilograms; the figures below convert the values to millions of dollars for readability. The listed countries are leading partners by value, not necessarily by weight.
| 2024 import measure | HS 293621: vitamin A and derivatives, unmixed | HS 293629: other vitamins and derivatives, unmixed |
|---|---|---|
| Total trade value | $88.251 million | $303.354 million |
| Total quantity | 2,329,630 kg | 17,550,200 kg |
| Leading listed partners by value | Switzerland: $37.188 million China: $29.196 million France: $6.855 million Italy: $4.466 million India: $4.010 million |
China: $169.828 million Switzerland: $37.079 million India: $36.633 million Italy: $25.970 million France: $6.772 million |
Source: World Bank WITS / UN Comtrade, 2024 U.S. imports: HS 293621 and HS 293629.
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Vitamin A and derivatives: Switzerland led by value, China by quantity
For unmixed vitamin A and derivatives (HS 293621), Switzerland was the largest listed partner by value, at $37.188 million, followed by China at $29.196 million. However, China supplied the greater quantity: 1,174,940 kg, compared with Switzerland’s 432,031 kg. The difference is a useful reminder that a country leading in trade value does not necessarily lead in physical volume.
Other unmixed vitamins: China led by value
For other unmixed vitamins and derivatives (HS 293629), China led by value at $169.828 million. Switzerland and India followed at $37.079 million and $36.633 million, respectively. This classification covers a different group of products from HS 293621, so the two rankings are not a contradiction: they describe distinct ingredient categories.
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Why ingredient imports do not reveal a bottle’s full origin
An import partner in a trade table is a customs and trade attribute. It does not establish where a supplement brand is based, where a finished product was formulated or packaged, or where every ingredient and component was manufactured. Nor do these figures trace a particular bottle bought by a consumer.
The examples above cover only two categories of unmixed vitamins. They do not measure all vitamins, minerals, botanicals, protein powders, probiotics or dietary supplements as a whole. A broader estimate would require a defined list of tariff classifications and careful treatment of what each classification includes; combining unlike codes casually can overlap product scopes or leave finished goods out.
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These are also one year’s figures, not a permanent ranking. Census revisions affecting 2023–2025 records were incorporated into DataWeb on June 20, 2026, and the site reported coverage through July 2026. For a current analysis, state the dataset year and retrieval date; do not assume a country pattern from 2024 remains unchanged.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How to check a product category in official trade data
- Define the product first. Find the relevant HS or other classification and check what it covers. A code for an ingredient is not automatically a code for finished supplements.
- Choose the measure that fits the question. For product and country-of-origin analysis, use general imports. Decide whether you need trade value, quantity or both.
- Set the year and trading partners. In USITC DataWeb, organize the query by product classification, partner and time period. Record those parameters and when you retrieved the data.
- Keep categories separate unless their scopes support combining them. A country ranking for one ingredient code should not be presented as a ranking for the entire supplement market.
The Census Bureau also provides other product-and-country views, including monthly and annual NAICS country data, annual end-use data and monthly SITC data. These classifications answer different questions, so they are not interchangeable with the HS examples above. Census Bureau country and product trade data
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Does a country’s import ranking say anything about safety?
No. Import statistics are not product approvals or quality tests. The FDA says manufacturers and distributors are responsible for evaluating safety and labeling before marketing dietary supplements; the agency can take enforcement action against adulterated or misbranded products after they reach the market. FDA dietary supplements overview
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