- 1). Place a sample of juice in a sturdy, sealed container. Locate a laboratory, preferably close to your home, that provides a food testing service for businesses and individuals. Search for laboratories by state.
- 2). Write your company or personal details into the relevant space on the submission form. A form is provided for you to send with your sample, in order to relay your personal information and your sample query. Describe the juice sample and estimated quantity. Detail exactly what you wish to know about the vitamin D content in the written space provided. Choose a method to receive results -- phone, email or post, as preferred or available.
- 3). Check expected turnover time for samples. Mail the sample, the submission form and the specified payment to your nearest laboratory.
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