For RF Doritos Nacho Cheese Tortilla Chips, the ingredient list includes cheddar cheese, whey, buttermilk, romano cheese, natural and artificial flavors, and later in the list "disodium inosinate" and "disodium guanylate." The ingredients are marked accurate as of 3/23/2021.

EWG's ingredient listing for Doritos Nacho Cheese Flavored Tortilla Chips includes cheddar cheese, whey, buttermilk, romano cheese, natural and artificial flavor, and "disodium inosinate" and "disodium guanylate" among the less-than-2%-of ingredients.

The UK Doritos product page for "Tangy Cheese" lists the full ingredients. The flavouring portion is described as: "Tangy Cheese Flavour [Whey powder (from Milk), Flavouring (contains Milk), Salt, Buttermilk Powder, Cheese Powder (from Milk), Tomato Powder, Onion Powder, Potassium Chloride, Sugar, Garlic Powder, Colours (Paprika Extract, Annatto Bixin, Plain Caramel), Acidity Regulators (Citric Acid, Lactic Acid), Milk Protein, Spices, Skimmed Milk Powder, Flavour Enhancer (Disodium 5‑Ribonucleotide)], Antioxidants (Rosemary Extract, Ascorbic Acid, Tocopherol Rich Extract, Citric Acid)." Disodium 5‑ribonucleotide is the generic name for the mixture of disodium inosinate and disodium guanylate used as a flavour enhancer.

The ingredient statement for Doritos Nacho Cheese flavored tortilla chips lists: "Corn, vegetable oil (sunflower, canola, and/or corn oil), maltodextrin (made from corn), and less than 2% of the following: salt, cheddar cheese (milk, cheese cultures, salt, enzymes), whey, monosodium glutamate, buttermilk, romano cheese (part-skim cow's milk, cheese cultures, salt, enzymes), romano cheese (cow's milk, cheese cultures, salt, enzymes), whey protein concentrate, onion powder, corn flour, natural and artificial flavor, dextrose, tomato powder, lactose, spices, artificial color (Yellow 6, Yellow 5, Red 40), lactic acid, citric acid, sugar, garlic powder, skim milk, red and green bell pepper powder, disodium inosinate, disodium guanylate, potassium chloride, and sodium caseinate." This confirms that Doritos Nacho Cheese chips contain disodium inosinate in the seasoning that includes cheese powders and milk-derived ingredients.

The Doritos Nacho Cheese product page is the official brand page for the snack, confirming the specific product identity being checked, but the page content shown here does not display the full ingredient list in the search snippet.

Product information for "Doritos Nacho Cheese Tortilla Chips 1.75 Ounce Plastic Bag" from Frito Lay lists the following ingredients: "Corn, Vegetable Oil (Corn, Canola, And/or Sunflower Oil), Maltodextrin (Made From Corn), Salt, Cheddar Cheese (Milk, Cheese Cultures, Salt, Enzymes), Whey, Monosodium Glutamate, Buttermilk, Romano Cheese (Part-skim Cow’s Milk, Cheese Cultures, Salt, Enzymes), Whey Protein Concentrate, Onion Powder, Corn Flour, Natural And Artificial Flavor, Dextrose, Tomato Powder, Lactose, Spices, Artificial Color (Yellow 6, Yellow 5, Red 40), Lactic Acid, Citric Acid, Sugar, Garlic Powder, Skim Milk, Red And Green Bell Pepper Powder, Disodium Inosinate, And Disodium Guanylate. Contains Milk." This shows disodium inosinate is part of the Doritos Nacho Cheese formulation along with cheese powders.

Wikipedia's Doritos article reproduces a U.S. Nacho Cheese Doritos ingredient list that includes cheddar cheese, whey, buttermilk, romano cheese, natural and artificial flavor, and "disodium inosinate" and "disodium guanylate."

The ingredient listing for "Frito-Lay Doritos Nacho Cheese 311,8g" states: "Corn, vegetable oil (sunflower, canola, and/or corn oil), maltodextrin (made from corn), salt, cheddar cheese (milk, cheese cultures, salt, enzymes), whey, monosodium glutamate, buttermilk, Romano cheese (part-skim cow's milk, cheese cultures, salt, enzymes), Romano cheese (cow's milk, cheese cultures, salt, enzymes), whey protein concentrate, onion powder, corn flour, natural and artificial flavor, dextrose, tomato powder, lactose, spices, artificial color (Yellow 6, Yellow 5, Red 40), lactic acid, citric acid, sugar, garlic powder, skim milk, red and green bell pepper powder, disodium inosinate, disodium guanylate, potassium chloride, and sodium caseinate." The presence of cheddar and Romano cheese along with disodium inosinate indicates the cheese-flavored powder contains disodium inosinate.

For Doritos Nacho Cheese flavored tortilla chips in the "Frito-lay Doritos & Cheetos Mix Snacks Variety" product, the ingredients are listed as: "corn, vegetable oil (sunflower, canola, and/or corn oil), maltodextrin (made from corn), and less than 2% of the following: salt, cheddar cheese (milk, cheese cultures, salt, enzymes), whey, monosodium glutamate, buttermilk, romano cheese (part-skim cow's milk, cheese cultures, salt, enzymes), romano cheese (cow's milk, cheese cultures, salt, enzymes), whey protein concentrate, onion powder, corn flour, natural and artificial flavor, dextrose, tomato powder, lactose, spices, artificial color (yellow 6, yellow 5, red 40), lactic acid, citric acid, sugar, garlic powder, skim milk, red and green bell pepper powder, disodium inosinate, disodium guanylate, potassium chloride, and sodium caseinate." The cheese-containing seasoning blend explicitly includes disodium inosinate.

The ingredient list for Doritos Cool Ranch flavored tortilla chips includes: "Monosodium Glutamate … Artificial Color (Including Red 40, Blue 1, Yellow 5) … Disodium Inosinate, and Disodium Guanylate." The article notes: "Disodium Inosinate - is a flavor enhancer, much like MSG." It is described as usually found together with disodium guanylate as flavor enhancers in Doritos.

The product description for "Frito Lay Snacks Doritos & Cheetos Mix Variety Pack" lists ingredients for Doritos Nacho Cheese flavored tortilla chips as including "Corn, Vegetable Oil (Sunflower, Canola, And/or Corn Oil), Maltodextrin (Made From Corn), Salt, Cheddar Cheese (Milk, Cheese Cultures, Salt, Enzymes), Whey, Monosodium Glutamate, Buttermilk, Romano Cheese (Part-skim Cow’s Milk, Cheese Cultures, Salt, Enzymes), Romano Cheese (Cow’s Milk, Cheese Cultures, Salt, Enzymes), Whey Protein Concentrate, Onion Powder, Corn Flour, Natural And Artificial Flavor, Dextrose, Tomato Powder, Lactose, Spices, Artificial Color (Yellow 6, Yellow 5, Red 40), Lactic Acid, Citric Acid, Sugar, Garlic Powder, Skim Milk, Red And Green Bell Pepper Powder, Disodium Inosinate, Disodium Guanylate, Potassium Chloride, And Sodium Caseinate." This confirms the cheese-seasoning powder on Doritos Nacho Cheese chips contains disodium inosinate.

The ingredient list for Doritos Flavored Tortilla Chips, Nacho Cheese, as recorded by EWG’s Food Scores, reads: "CORN, VEGETABLE OIL (SUNFLOWER, CANOLA, AND/OR CORN OIL), MALTODEXTRIN (MADE FROM CORN), AND LESS THAN 2% OF THE FOLLOWING: SALT, CHEDDAR CHEESE (MILK, CHEESE CULTURES, SALT, ENZYMES), WHEY, MONOSODIUM GLUTAMATE, BUTTERMILK, ROMANO CHEESE … ARTIFICIAL COLOR (YELLOW 6, YELLOW 5, RED 40), LACTIC ACID, CITRIC ACID, SUGAR, GARLIC POWDER, SKIM MILK, RED AND GREEN BELL PEPPER POWDER, DISODIUM INOSINATE, DISODIUM GUANYLATE, POTASSIUM CHLORIDE, AND SODIUM CASEINATE." This shows disodium inosinate is one of the minor (<2%) ingredients in the nacho cheese seasoning on Doritos tortilla chips.

Food additive reference entries explain that "disodium 5'-ribonucleotides" is a flavour enhancer mixture consisting mainly of disodium inosinate (E631) and disodium guanylate (E627). It is often declared on labels as "flavour enhancer (disodium 5'-ribonucleotide)" and used together with monosodium glutamate in savoury snacks such as flavoured crisps and chips.

The listing for "Frito Lay Classic Variety Mix, Assorted, 30 Bags/Box" includes Doritos Nacho Cheese Flavored Tortilla Chips, whose ingredients are given as: "Corn, Vegetable Oil (Sunflower, Canola, and/or Corn Oil), Maltodextrin (Made From Corn), Salt, Cheddar Cheese (Milk, Cheese Cultures, Salt, Enzymes), Whey, Monosodium Glutamate, Buttermilk, Romano Cheese (Part-Skim Cow’s Milk, Cheese Cultures, Salt, Enzymes), Romano Cheese (Cow’s Milk, Cheese Cultures, Salt, Enzymes), Whey Protein Concentrate, Onion Powder, Corn Flour, Natural And Artificial Flavor, Dextrose, Tomato Powder, Lactose, Spices, Artificial Color (Yellow 6, Yellow 5, Red 40), Lactic Acid, Citric Acid, Sugar, Garlic Powder, Skim Milk, Red And Green Bell Pepper Powder, Disodium Inosinate, And Disodium Guanylate. Contains Milk Ingredients." This shows disodium inosinate is one of the flavor enhancers used in the cheese coating.

An ingredient breakdown for Doritos Nacho Cheese lists corn, vegetable oil, salt, maltodextrin, monosodium glutamate (MSG), and "Disodium Inosinate & Disodium Guanylate — The MSG Boosters." The section explains that these two compounds "work synergistically with MSG to amplify the umami flavor" and notes: "If you see these on a label, MSG (or a source of free glutamates) is definitely present too." This analysis explicitly identifies disodium inosinate as part of the flavor/seasoning system on Doritos Nacho Cheese chips.

The Australian Doritos Original Flavoured Corn Chips page shows a different product with ingredients limited to corn, canola oil, salt, sunflower oil, and antioxidants; it does not support the claim about cheese powder and disodium inosinate for Nacho Cheese Doritos, but it helps distinguish regional product formulas.

A commercial description of nacho cheese powder notes: "Nacho Cheese Powder is made from real cheddar cheese and spices. Use it as a topping for tortilla chips, popcorn, and vegetables." This illustrates that the cheese coating on snacks like tortilla chips is typically a dry cheese powder combined with various seasonings and additives, rather than liquid cheese.

An ingredient list shown in a post discussing Doritos notes: "Corn, vegetable oil (corn, canola, and/or sunflower oil), maltodextrin (made from corn), salt, cheddar cheese (milk, cheese cultures, salt, enzymes), whey, monosodium glutamate, buttermilk, romano cheese (part-skim cow's milk, cheese cultures, salt, enzymes), romano cheese (cow's milk, cheese cultures, salt, enzymes), whey protein concentrate, onion powder, corn flour, natural and artificial flavor, dextrose, tomato powder, lactose, spices, artificial color (yellow 6, yellow 5, red 40), lactic acid, citric acid, sugar, garlic powder, skim milk, red and green bell pepper powder, sodium caseinate, disodium inosinate, disodium guanylate." The commentary highlights that Doritos use MSG and flavor enhancers such as disodium inosinate in their seasoning.

Environmental Working Group’s product page for "Frito Lay Munchies, Doritos, Cheetos, Sunchips, Rold Gold Cheese Fix Snack Mix" lists ingredients for the cheese-flavored components including: "Corn, Vegetable Oil (Corn, Canola, And/or Sunflower Oil), Maltodextrin (Made From Corn), Salt, Cheddar Cheese (Milk, Cheese Cultures, Salt, Enzymes), Whey, Monosodium Glutamate, Buttermilk, Romano Cheese (Part-skim Cow’s Milk, Cheese Cultures, Salt, Enzymes), Romano Cheese (Cow’s Milk, Cheese Cultures, Salt, Enzymes), Whey Protein Concentrate, Onion Powder, Corn Flour, Natural And Artificial Flavor, Dextrose, Tomato Powder, Lactose, Spices, Artificial Color (Yellow 6, Yellow 5, Red 40), Lactic Acid, Citric Acid, Sugar, Garlic Powder, Skim Milk, Red And Green Bell Pepper Powder, Sodium Caseinate, Parmesan Cheese (Milk, Cheese Cultures, Salt, Enzymes), Red And Green Bell Pepper Powder, Disodium Inosinate, And Disodium Guanylate." This shows disodium inosinate used together with cheese powders in Frito-Lay mixed snack products containing Doritos.

The Open Food Facts entry for a Doritos product lists ingredients (partially OCR’d) including: "corn, vegetable oil (corn, canola … monosod[ium] glutamate, salt, enzymes), whey, buttermilk, romano cheese (part-skim cow's milk …)." Although the text is truncated, the database typically records full ingredient lists from packaging, and Doritos variants with cheese seasoning routinely list flavor enhancers such as disodium inosinate along with monosodium glutamate in their formulations.

A profile of disodium inosinate states: "Disodium Inosinate is a flavor enhancer commonly used in the food industry to boost the savory umami taste of processed foods." It notes that it is "often combined with monosodium glutamate (MSG) or disodium guanylate" and used in "processed snacks: flavored potato chips, popcorn seasoning, pretzels with cheese flavoring" and other convenience foods. The article explains that the FDA classifies disodium inosinate as "Generally Recognized as Safe (GRAS)" and that WHO/JECFA have deemed it safe within an ADI of 0–3 mg/kg body weight, while advising people with gout to be cautious due to its purine content.

The Wikipedia entry describes disodium inosinate (E631) as "the disodium salt of inosinic acid" used as a food additive. It is "often found in instant noodles, potato chips, and a variety of other snacks" and "used as a flavor enhancer, in synergy with monosodium glutamate (MSG) to provide the umami taste." It notes that disodium inosinate is often added together with disodium guanylate, and that disodium inosinate presence in ingredients usually indicates that glutamic acid or MSG is also present in the product.

The Sanza product page for Doritos Nacho Cheese lists a UK-style ingredient mixture including corn, canola oil, maltodextrin, salt, sugar, spices, and other seasonings; the snippet shown does not clearly display disodium inosinate, so it is weaker evidence for the claim.

An article on making Doritos-style seasoning at home uses cheddar and Romano cheese powders as the base: "I relied on three ingredients that are best sourced from a good purveyor: cheddar and Romano cheese powders and tomato powder." The recipe calls for "1/4 cup cheddar cheese powder" and notes that this mimics the commercial Doritos cheese coating, though tomato powder is substituted for the red bell pepper powder listed on Doritos’ ingredient label.

A homemade Doritos copycat recipe by chef Joshua Weissman uses a dry cheese powder mixture to coat fried corn tortillas. The store‑bought version lists: "1 cup (112g) cheddar cheese powder", "1/4 cup (30g) white cheddar cheese powder", and "1/4 cup (35g) buttermilk powder" among other seasonings such as MSG, onion powder, smoked paprika, and salt, which are whisked together and dusted onto the chips immediately after frying.

A discussion post about "Disodium inosinate in snack foods like Doritos and Great Value chips" notes consumer concern about this flavor enhancer in popular snacks. The post comments that certain store-brand chips "almost taste like a mix of cool ranch and nacho cheese original Doritos" and that disodium inosinate appears among their ingredients, drawing a parallel with Doritos-style cheese and ranch flavorings that use disodium inosinate in the seasoning.

A Reddit discussion about recreating Nacho Cheese Doritos powder describes combining cheddar cheese powder, white cheddar cheese powder, buttermilk powder, nutritional yeast, MSG, onion powder, smoked paprika, and fine sea salt. The user notes this mixture is then dusted onto baked or fried tortilla chips, indicating that the characteristic Doritos coating is a dry cheese and flavouring blend rather than whole cheese.

A news report on new "Simply NKD Doritos" and "Simply NKD Cheetos" notes that these versions "don't contain the flavor-enhancing additives disodium inosinate and disodium guanylate" compared with standard formulations. By implication, conventional Doritos and Cheetos products do use disodium inosinate and disodium guanylate as flavor enhancers in their seasonings.

This Instagram reel claims that Doritos contain ingredients such as MSG and artificial flavors and says these are engineered to be rewarding, but it is not a reliable source for ingredient verification.

A home recipe for "Easy Homemade Doritos" uses corn tortillas and seasons them with "3 tablespoons grated Parmesan cheese", chili powder, smoked paprika, and salt, coating the oiled tortilla triangles in the mixture before baking. This demonstrates the concept of a powdered cheese and spice coating applied to tortilla chips to emulate Doritos-style flavoured chips.

A social media post criticizing Doritos lists the ingredients for a nacho cheese variety: "Corn, Vegetable Oil (Corn, Canola, And/or Sunflower Oil), Maltodextrin (Made From Corn), Salt, Cheddar Cheese (Milk, Cheese Cultures, Salt, Enzymes), Whey, Monosodium Glutamate, Buttermilk, Romano Cheese (Part-skim Cow’s Milk, Cheese Cultures, Salt, Enzymes), Whey Protein Concentrate, Onion Powder, Corn Flour, Natural And Artificial Flavor, Dextrose, Tomato Powder, Lactose, Spices, Artificial Color (Yellow 6, Yellow 5, And Red 40), Lactic Acid, Citric Acid, Sugar, Garlic Powder, Skim Milk, Red And Green Bell Pepper Powder, Disodium Inosinate, And Disodium Guanylate." This ingredient list shows disodium inosinate present alongside cheese ingredients and other seasonings on Doritos chips.

A Facebook post promoting an alternative chip notes that the recommended nacho cheese tortilla chips are "free of: monosodium glutamate (MSG), dextrose, lactose, artificial color, disodium inosinate and disodium guanylate." In contrast, the post states that Doritos are made with ingredients like MSG and artificial flavors engineered to be highly rewarding, implicitly acknowledging that standard Doritos formulations include disodium inosinate and disodium guanylate among their additives.

An Instagram reel labelled "Homemade Doritos!" shows a "Seasoning Blend / Cheese Powder Mix" for coating tortilla chips that includes: "1 tsp MSG", smoked paprika, paprika, onion powder, kosher salt, chili powder, citric acid, "1/2 cup Cheddar Cheese Powder" and "1 Tbsp White Cheddar Cheese Powder". The blend is used to season tortilla chips after frying or baking, mimicking the cheese powder coating of commercial Doritos.

A Facebook post seeking a "homemade Doritos seasoning without MSG" shares a spice mix recipe using nutritional yeast, chipotle chile powder, garlic powder, onion powder, salt, and smoked paprika. The mix is intended to be sprinkled on tortilla chips, again reflecting the general practice of using powdered seasonings as a coating to create Doritos-like flavoured chips.