Food ingredients may be "food additives" that are approved by FDA for specific uses or GRAS (generally recognized as safe) substances. A substance may be GRAS only if its general recognition of safety is based on the views of experts qualified to evaluate the safety of the substance. GRAS status may be based either on a history of safe use in food prior to 1958 or on scientific procedures, which require the same quantity and quality of evidence as would be required to obtain a food additive regulation. Because GRAS status may be either affirmed by FDA or determined independently by qualified experts, FDA's regulations do not include all GRAS ingredients and the specific uses described in the GRAS regulations may not be comprehensive for the listed ingredients.

The following list, which derives partially from FDA's regulations in Title 21 of the Code of Federal Regulations (21 CFR), includes approved food additives and substances whose GRAS status has been affirmed by FDA. This list includes some ingredients that are not listed in 21 CFR but have been the subject of opinion letters from FDA to individuals who asked whether FDA would object to the use of the ingredient in food on the basis of an independent GRAS determination. In addition, enzyme preparations may be the subject of a GRAS notice. For further information, consult the summary listing of GRAS notices. Because the list below is not updated on a regular basis, questions about the regulatory status of enzyme preparations that are not on this list may be directed to us via electronic mail at PREMARKT@VM.CFSAN.FDA.GOV.

The following is a compilation of enzymes listed as food additives in 21 CFR Part 173. Conditions for their use are prescribed in the referent regulations and are predicated on the use of good manufacturing practices.

To access the specific regulations listed below, type in the title number, 21, and then the section and part numbers, e.g. 173 and 110 at the Government Printing Office web site.

§ 173.110	Amyloglucosidase derived from Rhizopus niveus for use in degrading gelatinized starch into constituent sugars.
§ 173.120	Carbohydrase and cellulase derived from Aspergillus niger for use in clam and shrimp processing.
§ 173.130	Carbohydrase derived from Rhizopus oryzae for use in the production of dextrose from starch.
§ 173.135	Catalase derived from Micrococcus lysodeikticus for use in the manufacture of cheese.
§ 173.140	Esterase-lipase derived from Mucor miehei var. Cooney et Emerson as a flavor enhancer in cheeses, fats and oils, and milk products.
§173.145	-galactosidase derived from Mortierella vinaceae var. raffinoseutilizer for use in the production of sucrose from sugar beets.
§ 173.150	Milk-clotting enzymes, microbial for use in the production of cheese (Milk-clotting enzymes are derived from Endothia parasitica Bacillus cereus, Mucor pusillus Lindt and Mucor miehei Cooney et Emerson and Aspergillus oryzae modified to contain the gene for aspartic proteinase from Rhizomucor miehei var Cooney et Emerson).

The following food standard lists a permitted enzyme.

§137.105

Flour may contain -amylase obtained from the fungus Aspergillus oryzae.

The following is a compilation of enzymes that have been affirmed as GRAS by FDA for specified or unspecified food uses and listed in 21 CFR Part 184. Conditions for their use are prescribed in the referent regulations and are predicated on the use of nontoxicogenic strains of the respective organisms and on the use of current good manufacturing practice (184.1(b)).

Please be aware that FDA has not affirmed as GRAS all food ingredients that it may consider GRAS. Therefore, this does not represent a complete list of all enzymes that FDA may view as GRAS for some uses.

§184.1012	Alpha-amylase enzyme preparation from Bacillus stearothermophilus used to hydrolyze edible starch to produce maltodextrin and nutritive carbohydrate sweeteners.
§184.1024	Bromelain derived from pineapples, Ananas comosus and Ananas bracteatus used to hydrolyze proteins and polypeptides.
§184.1027	Mixed carbohydrase and protease enzyme product derived from Bacillus licheniformis for use in hydrolyzing proteins and carbohydrates in the preparation of alcoholic beverages, candy, nutritive sweeteners and protein hydrolysates.
§184.1034	Catalase from bovine liver used to decompose hydrogen peroxide
§184.1316	Ficin (peptide hydrolase) from the genus Ficus to hydrolyze proteins and polypeptides.
§184.1372	Insoluble glucose isomerase enzyme preparations are derived from recognized species of precisely classified, nonpathogenic, and nontoxicogenic microorganisms, including Streptomyces rubiginosus, Actinoplane missouriensis, Streptomyces olivaceus, Streptomyces olivochromogenes and Bacillus coagulans grown in a pure culture fermentation that produces no antibiotic.
§184.1387	Lactase enzyme preparation from Candida pseudotropicalis for use in hydrolyzing lactose to glucose and galactose.
§184.1388	Lactase enzyme preparation from Kluyveromyces lactis (previously called Saccharomyces lactis) for use in hydrolyzing lactose in milk.
§184.1415	Animal lipase (triacylglycerol hydrolase) derived from the edible forestomach of calves, kids or lambs used to hydrolyze fatty acid glycerides.
§184.1420	Lipase enzyme preparation from Rhizopus niveus used in the interesterification of fats and oils.
§184.1443	Malt (-amylase and -amylase) from barley to hydrolyze starch.
§184.1583	Pancreatin (peptide hydrolase) from porcine or bovine pancreatic tissue used to hydrolyze proteins or polypeptides.
§184.1585	Papain derived from papaya, Carica papaya L. .
§184.1595	Pepsin (peptide hydrolase) from hog stomach used to hydrolyze proteins.
§184.1685	Rennet (animal derived) and chymosin preparation from Escherichia coli K-12, Kluyveromyces marxianus var. lactis or Aspergillus niger var. awamori to coagulate milk in cheeses and other dairy products.
§184.1914	Trypsin (peptide hydrolase) from porcine or bovine pancreas used to hydrolyze proteins.
§184.1924	Urease enzyme preparation from Lactobacillus fermentum for use in the production of wine.
§184.1985	Aminopeptidase enzyme preparation from Lactococcus lactisused as an optional ingredient for flavor development in the manufacture of cheddar cheese.

The following is a compilation of microbially derived enzymes which the FDA recognized as GRAS in opinion letters issued in the early 1960's. The opinions are predicated on the use of nonpathogenic and nontoxicogenic strains of the respective organisms and on the use of current good manufacturing practice.

	Carbohydrase, cellulase, glucose oxidase-catalase, pectinase, and lipase from Aspergillus niger
	Carbohydrase and protease from Aspergillus oryzae
	Carbohydrase and protease from Bacillus subtilis
	Invertase from edible baker's yeast or brewer's yeast (Saccharomyces cerevisiae)

Content last updated by msl on 2001-JUL-19
Hypertext updated by ear/emw/dms on 2001-JUL-27