以下是“美國海關(guān)和邊境保衛(wèi)局”網(wǎng)站有關(guān)攜帶食品入境的相關(guān)規(guī)定。通常在個人行李中攜帶少量個人食用已加工好的食品（不是所有加工過的食品）是允許的，但應(yīng)該申報。新鮮肉，蛋，蔬菜，水果等是絕不允許攜帶入境的，即使是加工以后的肉，蛋等通常也是不讓入境的。至于您所說的三七粉等可申報為保健營養(yǎng)品，一定要有原始的密封包裝，并有內(nèi)容物的成分說明等。具體要求請參看下面的規(guī)定。

Travelers bringing food into the U.S. for personal use

Can I bring in food as a traveler (fruit, cheese, meat, etc.)?
The information contained in this answer does not apply to food being sent to the U.S. through the mail, courier services or other means.
This information only covers food (fruit, cheese, meat, etc.) entering the United States in passenger baggage for personal use.
See the question "How do I import food (canned goods, meat, vegetables, fruits, bulk food, etc.) for resale?" for information on importing food for resale.

You may be able to bring in food such as fruits, meats or other agricultural products depending on the region or country from which you are traveling. Restrictions are placed on these products to protect community health, preserve the environment and prevent the introduction of devastating diseases to domestic plants and animals.
You must declare all food products. Failure to declare food products can result in up to $10,000 in fines and penalties.

The following are generally admissible:
-Condiments such as ketchup (catsup), mustard, mayonnaise, Marmite and Vegemite and prepared sauces that do not contain meat products
-Olive oil and other vegetable oils
-Bread, cookies, crackers, cakes, granola bars, cereal and other baked and processed products
-Candy and chocolate
-Cheese- Solid cheese (hard or semi-soft, that does not contain meat); butter, butter oil, and cultured milk products such as yogurt and sour cream are not restricted. Feta cheese, Brie, Camembert, cheese in brine, Mozzarella and Buffalo Mozzarella are permissible (USDA Animal Product Manual, Table 3-14-6). Cheese in liquid (such as cottage cheese or ricotta cheese) and cheese that pours like heavy cream are not admissible from countries affected by foot-and-mouth disease (FMD). Cheese containing meat is not admissible depending on the country of origin.
-Canned goods and goods in vacuum packed jars (other than those containing meat or poultry products) for your personal use
-Fish- personal amounts of fish, shrimp, abalone and other seafood are allowed and can be fresh, frozen, dried, smoked, canned or cooked
-Dried Fruit- things like apricots, barberry, currants, dates, figs, gooseberries, peaches, prunes, raisins, tomatillos, and zereshk (USDA Miscellaneous and Processed Products Manual, Table 3-69)
-Liquid milk and milk products intended for use by infants or very young children are admissible if in a reasonable amount or small quantity for several days' use.
-Powder drinks sealed in original containers with ingredients listed in English. However, admissibility is still under the discretion of the Customs and Border Protection (CBP) Agricultural Specialist.
-Juices- commercially canned (USDA Miscellaneous and Processed Products Manual, Table 3-75)
-Tea- commercially packaged and ready to be boiled, steeped or microwaved in liquid. Coca, barberry and loose citrus leaves are prohibited (USDA Miscellaneous and Processed Products Manual, Table 3-148)
-Coffee- roasted or unroasted if there is no pulp attached. (USDA Miscellaneous and Processed Products Manual, Table 3-48)
-Spices- most dried spices are allowed except for orange, lemon, lime and other citrus leaves and seeds, lemongrass, and many vegetable and fruit seeds
-Honey- comb honey, royal jelly, bee bread, or propolis if it is not intended to be fed to bees (USDA Miscellaneous and Processed Products Manual, Table 3-100)
-Noodles and ramen that do not have meat or eggs in the spice packets
-Rice- (See ALERT below) white rice, basmati rice, brown rice, husked rice, polished rice, rice flour and other products that do not have the hull attached (USDA Miscellaneous and Processed Products Manual, Table 3-130).
ALERT: Effective July 30, 2011 non-commercial quantities of rice from countries where Khapra beetle is known to occur will be prohibited from entering the United States. Failure to declare rice will result in fines.
-Flour- wheat, rice, oat and cornmeal
-Mushrooms, fresh and dried- above ground parts that are clean and free of soil
-Nuts- All nuts are allowed if they have been boiled, cooked, ground, oven dried, pureed, roasted, or steamed. Other nuts may be allowed if they are free from their husks (the shell remains), such as almonds, betel nuts, Brazil nuts, cashews, coquilla nuts, filberts (hazelnuts), Java olives, kara nuts, gingko nuts, macadamias, pecans, pili nuts, pine nuts (pinon nuts), pistachios, and walnuts. (USDA Miscellaneous and Processed Products Manual, Table 3-105, 3-106)
-Bakery items, candy, chocolate, and dry mixes containing dairy and egg ingredients [such as baking mixes, cocoa mixes, drink mixes, instant cake mixes, instant pudding mixes, liquid drink mixes containing reconstituted dry milk or dry milk products (including those that contain sugar), potato flakes, and infant formula] commercially labeled and presented in final finished packaging are generally admissible.
Fruits and Vegetables:
Travelers may check the general admissibility of fruits and vegetables by consulting APHIS's FAVIR database. Simply select the type of fruit or vegetable in the "Approved Name:", and then select the country of origin in the "Country/Region:" field. You will receive one of the following results:
· 0 entries found means the fruit or vegetable is NOT allowed into the United States
· # entry(ies) found [followed by the name of the commodity and the name of the country] click on "CIR".
?If the import requirements indicate: 1 Subject to Inspection: This commodity is subject to inspection at the port of entry and all general requirements of 7 CFR 319.56-3. The fruit or vegetable is allowed into the United States pending Inspection.

?If the import requirements indicate: Condition of entry treatment then the fruit or vegetable is NOT allowed into the United States in passenger baggage.

Every fruit or vegetable must be declared to a CBP Agriculture Specialist or CBP Officer and must be presented for inspection - regardless of its admissibility status. Fresh fruits and vegetables need to be clean and may be prohibited if they have insects or diseases.
Note: See FDA Web site Food products imported from Japan and radiation safety.
The following items are admissible:
?Aloe- above ground parts

?Coconuts-husks must have been completely removed and cannot have sprouted

?Garlic- peeled cloves

?Ginger- clean roots

?St. John's bread- pod

?Tamarind bean pod

?Water chestnut- corm or nut only

Animal Products and Animal By-Products:
Meat, milk, egg, poultry, and their products, including products made with these materials, such as dried soup mix or bouillon, are either prohibited or restricted from entering the United States, depending on the types of animal diseases which occur in the country of origin. Fresh (chilled or frozen), dried, cured, and fully cooked meat is generally prohibited from most countries. Canned meat is allowed entry, except caprine and ovine meats, including lamb, mutton, and goat, etc., from Canada and countries affected by bovine spongiform encephalopathy (BSE).
Products containing raw egg ingredients are prohibited from most regions.
Eggs and egg products from Exotic Newcastle Disease (END) and Highly Pathogenic Avian Influenza (HPAI) affected regions, including cooked eggs, if not accompanied by a USDA Veterinary Service import permit remain prohibited regardless if those items are for personal consumption. Effective February 15, 2012, travelers may once again bring fully cooked eggs from Mexico into the U.S.
Pork should be commercially canned and labeled in unopened containers. Pork and pork products are not admissible from Mexico, except for cooked pork in small amounts for a meal.
Effective January 14, 2010, cooked pork skins (also known as pork rind) entering as commercial cargo or in passenger baggage from regions affected with foot-and-mouth disease (FMD), swine vesicular disease (SVD), African swine fever (ASF), or classical swine fever (CSF) must be accompanied by an original certificate issued by an official of the National Government of the region of origin.