Vitamin B2 (Riboflavin)

Overview
Vitamin B2, also known as riboflavin, is a water-soluble vitamin that forms the coenzymes flavin mononucleotide (FMN) and FAD (flavin adenine dinucleotide). These coenzymes support oxidative metabolism and redox balance throughout the body. FAD acts as a critical cofactor for MTHFR (methylenetetrahydrofolate reductase), linking riboflavin to homocysteine recycling and methylation capacity. Riboflavin also facilitates the metabolism of other B vitamins including B12, B6, and niacin, and supports antioxidant enzymes, making it an important component of the B vitamin network.
Recipes
Foods
Biological Mechanisms and Implications
References
- Riboflavin forms flavin mononucleotide (FMN) and FAD, supporting oxidative metabolism and redox balance; FAD is a critical cofactor for MTHFR, linking B2 to homocysteine recycling and methylation capacity Aragão et al. 2024
- Riboflavin facilitates metabolism of B12, B6, and niacin; supports antioxidant enzymes; ties into methylation capacity
Foods supply the named dietary input. They are not shown as containing the downstream metabolite. Conversion evidence does not establish a new downstream PM admission, effective dose or equivalent food intervention.
Vitamin B2 → Riboflavin kinase (RFK) phosphorylates riboflavin to FMN using ATP. → Flavin mononucleotide (FMN)
BRS1-FM1-PM3: Maintain appropriately regulated dopamine synthesis, storage, release, receptor signalling, reuptake and metabolism across changing functional demand.
Existing admission: Type A / derived; versioned-assessment. Production context for an already admitted substrate; no new metabolite-to-PM relationship is admitted.
Rat enzyme capacity, not measured human neurotransmitter clearance, synaptic output or benefit above adequacy. No conclusion about which flavin analogue is effective is taken from the internally inconsistent abstract. The same experiment is shared across the three monoamine PMs, not independent replication.
- Almonds — supplies Vitamin B2; verified; form not known. Nuts, almonds
Composition provenance
USDA SR Legacy April 2018
- Beef — supplies Vitamin B2; verified; raw. Beef, ground, 85% lean meat / 15% fat, raw (Includes foods for USDA's Food Distribution Program)
Composition provenance
USDA SR Legacy April 2018
- Broccoli — supplies Vitamin B2; verified; raw. Broccoli, raw
Composition provenance
USDA SR Legacy April 2018
- Kale — supplies Vitamin B2; verified; raw. Kale, raw
Composition provenance
USDA SR Legacy April 2018
- Milk — supplies Vitamin B2; verified; form not known. Milk, whole, 3.25% milkfat, with added vitamin D
Composition provenance
USDA SR Legacy April 2018
- Nori — supplies Vitamin B2; verified; dried. Purple laver (Porphyra spp.), dried, toasted
Composition provenance
MEXT Standard Tables of Food Composition in Japan (2023 supplement), food 09004
- Nutritional Yeast — supplies Vitamin B2; verified; dried. Marigold Engevita Nutritional Yeast Flakes with B12, dried inactive Saccharomyces cerevisiae
Composition provenance
Marigold Health Foods label
- Quinoa — supplies Vitamin B2; verified; uncooked. Quinoa, uncooked
Composition provenance
USDA SR Legacy April 2018
- Salmon Roe — supplies Vitamin B2; verified; form not known. Chum salmon (Oncorhynchus keta), salted roe (ikura)
Composition provenance
MEXT Standard Tables of Food Composition in Japan (2023 supplement), food 10140
- Spinach — supplies Vitamin B2; verified; raw. Spinach, raw
Composition provenance
USDA SR Legacy April 2018
Enzyme identity does not quantify tissue cofactor supply or flux after a meal.
Dependencies: Functional RFK; ATP and divalent metal availability
Vitamin B2 → Riboflavin kinase (RFK) phosphorylates riboflavin to FMN using ATP. → FLAD1 FAD synthase adenylates FMN with ATP to form FAD. → Flavin adenine dinucleotide (FAD)
BRS1-FM1-PM3: Maintain appropriately regulated dopamine synthesis, storage, release, receptor signalling, reuptake and metabolism across changing functional demand.
Existing admission: Type A / derived; versioned-assessment. The complete derived relationship is admitted for this PM.
Rat enzyme capacity, not measured human neurotransmitter clearance, synaptic output or benefit above adequacy. No conclusion about which flavin analogue is effective is taken from the internally inconsistent abstract. The same experiment is shared across the three monoamine PMs, not independent replication.
- Almonds — supplies Vitamin B2; verified; form not known. Nuts, almonds
Composition provenance
USDA SR Legacy April 2018
- Beef — supplies Vitamin B2; verified; raw. Beef, ground, 85% lean meat / 15% fat, raw (Includes foods for USDA's Food Distribution Program)
Composition provenance
USDA SR Legacy April 2018
- Broccoli — supplies Vitamin B2; verified; raw. Broccoli, raw
Composition provenance
USDA SR Legacy April 2018
- Kale — supplies Vitamin B2; verified; raw. Kale, raw
Composition provenance
USDA SR Legacy April 2018
- Milk — supplies Vitamin B2; verified; form not known. Milk, whole, 3.25% milkfat, with added vitamin D
Composition provenance
USDA SR Legacy April 2018
- Nori — supplies Vitamin B2; verified; dried. Purple laver (Porphyra spp.), dried, toasted
Composition provenance
MEXT Standard Tables of Food Composition in Japan (2023 supplement), food 09004
- Nutritional Yeast — supplies Vitamin B2; verified; dried. Marigold Engevita Nutritional Yeast Flakes with B12, dried inactive Saccharomyces cerevisiae
Composition provenance
Marigold Health Foods label
- Quinoa — supplies Vitamin B2; verified; uncooked. Quinoa, uncooked
Composition provenance
USDA SR Legacy April 2018
- Salmon Roe — supplies Vitamin B2; verified; form not known. Chum salmon (Oncorhynchus keta), salted roe (ikura)
Composition provenance
MEXT Standard Tables of Food Composition in Japan (2023 supplement), food 10140
- Spinach — supplies Vitamin B2; verified; raw. Spinach, raw
Composition provenance
USDA SR Legacy April 2018
Enzyme identity does not quantify tissue cofactor supply or flux after a meal.
Dependencies: Functional RFK; ATP and divalent metal availability
FAD production and enzyme loading depend on cellular context; no fixed food-to-FAD yield is inferred.
Dependencies: Functional FLAD1 FAD synthase; ATP and divalent metal availability
Vitamin B2 → Riboflavin kinase (RFK) phosphorylates riboflavin to FMN using ATP. → Flavin mononucleotide (FMN)
BRS1-FM1-PM4: Support noradrenergic alertness and executive control so attention and arousal stay appropriately engaged.
Existing admission: Type A / derived; versioned-assessment. Production context for an already admitted substrate; no new metabolite-to-PM relationship is admitted.
Rat enzyme capacity, not measured human neurotransmitter clearance, synaptic output or benefit above adequacy. No conclusion about which flavin analogue is effective is taken from the internally inconsistent abstract. The same experiment is shared across the three monoamine PMs, not independent replication.
- Almonds — supplies Vitamin B2; verified; form not known. Nuts, almonds
Composition provenance
USDA SR Legacy April 2018
- Beef — supplies Vitamin B2; verified; raw. Beef, ground, 85% lean meat / 15% fat, raw (Includes foods for USDA's Food Distribution Program)
Composition provenance
USDA SR Legacy April 2018
- Broccoli — supplies Vitamin B2; verified; raw. Broccoli, raw
Composition provenance
USDA SR Legacy April 2018
- Kale — supplies Vitamin B2; verified; raw. Kale, raw
Composition provenance
USDA SR Legacy April 2018
- Milk — supplies Vitamin B2; verified; form not known. Milk, whole, 3.25% milkfat, with added vitamin D
Composition provenance
USDA SR Legacy April 2018
- Nori — supplies Vitamin B2; verified; dried. Purple laver (Porphyra spp.), dried, toasted
Composition provenance
MEXT Standard Tables of Food Composition in Japan (2023 supplement), food 09004
- Nutritional Yeast — supplies Vitamin B2; verified; dried. Marigold Engevita Nutritional Yeast Flakes with B12, dried inactive Saccharomyces cerevisiae
Composition provenance
Marigold Health Foods label
- Quinoa — supplies Vitamin B2; verified; uncooked. Quinoa, uncooked
Composition provenance
USDA SR Legacy April 2018
- Salmon Roe — supplies Vitamin B2; verified; form not known. Chum salmon (Oncorhynchus keta), salted roe (ikura)
Composition provenance
MEXT Standard Tables of Food Composition in Japan (2023 supplement), food 10140
- Spinach — supplies Vitamin B2; verified; raw. Spinach, raw
Composition provenance
USDA SR Legacy April 2018
Enzyme identity does not quantify tissue cofactor supply or flux after a meal.
Dependencies: Functional RFK; ATP and divalent metal availability
Vitamin B2 → Riboflavin kinase (RFK) phosphorylates riboflavin to FMN using ATP. → FLAD1 FAD synthase adenylates FMN with ATP to form FAD. → Flavin adenine dinucleotide (FAD)
BRS1-FM1-PM4: Support noradrenergic alertness and executive control so attention and arousal stay appropriately engaged.
Existing admission: Type A / derived; versioned-assessment. The complete derived relationship is admitted for this PM.
Rat enzyme capacity, not measured human neurotransmitter clearance, synaptic output or benefit above adequacy. No conclusion about which flavin analogue is effective is taken from the internally inconsistent abstract. The same experiment is shared across the three monoamine PMs, not independent replication.
- Almonds — supplies Vitamin B2; verified; form not known. Nuts, almonds
Composition provenance
USDA SR Legacy April 2018
- Beef — supplies Vitamin B2; verified; raw. Beef, ground, 85% lean meat / 15% fat, raw (Includes foods for USDA's Food Distribution Program)
Composition provenance
USDA SR Legacy April 2018
- Broccoli — supplies Vitamin B2; verified; raw. Broccoli, raw
Composition provenance
USDA SR Legacy April 2018
- Kale — supplies Vitamin B2; verified; raw. Kale, raw
Composition provenance
USDA SR Legacy April 2018
- Milk — supplies Vitamin B2; verified; form not known. Milk, whole, 3.25% milkfat, with added vitamin D
Composition provenance
USDA SR Legacy April 2018
- Nori — supplies Vitamin B2; verified; dried. Purple laver (Porphyra spp.), dried, toasted
Composition provenance
MEXT Standard Tables of Food Composition in Japan (2023 supplement), food 09004
- Nutritional Yeast — supplies Vitamin B2; verified; dried. Marigold Engevita Nutritional Yeast Flakes with B12, dried inactive Saccharomyces cerevisiae
Composition provenance
Marigold Health Foods label
- Quinoa — supplies Vitamin B2; verified; uncooked. Quinoa, uncooked
Composition provenance
USDA SR Legacy April 2018
- Salmon Roe — supplies Vitamin B2; verified; form not known. Chum salmon (Oncorhynchus keta), salted roe (ikura)
Composition provenance
MEXT Standard Tables of Food Composition in Japan (2023 supplement), food 10140
- Spinach — supplies Vitamin B2; verified; raw. Spinach, raw
Composition provenance
USDA SR Legacy April 2018
Enzyme identity does not quantify tissue cofactor supply or flux after a meal.
Dependencies: Functional RFK; ATP and divalent metal availability
FAD production and enzyme loading depend on cellular context; no fixed food-to-FAD yield is inferred.
Dependencies: Functional FLAD1 FAD synthase; ATP and divalent metal availability
Vitamin B2 → Riboflavin kinase (RFK) phosphorylates riboflavin to FMN using ATP. → Flavin mononucleotide (FMN)
BRS1-FM1-PM5: Support serotonergic signalling so mood stability, inhibition, and behavioural regulation remain well grounded.
Existing admission: Type A / derived; versioned-assessment. Production context for an already admitted substrate; no new metabolite-to-PM relationship is admitted.
Rat enzyme capacity, not measured human neurotransmitter clearance, synaptic output or benefit above adequacy. No conclusion about which flavin analogue is effective is taken from the internally inconsistent abstract. The same experiment is shared across the three monoamine PMs, not independent replication.
- Almonds — supplies Vitamin B2; verified; form not known. Nuts, almonds
Composition provenance
USDA SR Legacy April 2018
- Beef — supplies Vitamin B2; verified; raw. Beef, ground, 85% lean meat / 15% fat, raw (Includes foods for USDA's Food Distribution Program)
Composition provenance
USDA SR Legacy April 2018
- Broccoli — supplies Vitamin B2; verified; raw. Broccoli, raw
Composition provenance
USDA SR Legacy April 2018
- Kale — supplies Vitamin B2; verified; raw. Kale, raw
Composition provenance
USDA SR Legacy April 2018
- Milk — supplies Vitamin B2; verified; form not known. Milk, whole, 3.25% milkfat, with added vitamin D
Composition provenance
USDA SR Legacy April 2018
- Nori — supplies Vitamin B2; verified; dried. Purple laver (Porphyra spp.), dried, toasted
Composition provenance
MEXT Standard Tables of Food Composition in Japan (2023 supplement), food 09004
- Nutritional Yeast — supplies Vitamin B2; verified; dried. Marigold Engevita Nutritional Yeast Flakes with B12, dried inactive Saccharomyces cerevisiae
Composition provenance
Marigold Health Foods label
- Quinoa — supplies Vitamin B2; verified; uncooked. Quinoa, uncooked
Composition provenance
USDA SR Legacy April 2018
- Salmon Roe — supplies Vitamin B2; verified; form not known. Chum salmon (Oncorhynchus keta), salted roe (ikura)
Composition provenance
MEXT Standard Tables of Food Composition in Japan (2023 supplement), food 10140
- Spinach — supplies Vitamin B2; verified; raw. Spinach, raw
Composition provenance
USDA SR Legacy April 2018
Enzyme identity does not quantify tissue cofactor supply or flux after a meal.
Dependencies: Functional RFK; ATP and divalent metal availability
Vitamin B2 → Riboflavin kinase (RFK) phosphorylates riboflavin to FMN using ATP. → FLAD1 FAD synthase adenylates FMN with ATP to form FAD. → Flavin adenine dinucleotide (FAD)
BRS1-FM1-PM5: Support serotonergic signalling so mood stability, inhibition, and behavioural regulation remain well grounded.
Existing admission: Type A / derived; versioned-assessment. The complete derived relationship is admitted for this PM.
Rat enzyme capacity, not measured human neurotransmitter clearance, synaptic output or benefit above adequacy. No conclusion about which flavin analogue is effective is taken from the internally inconsistent abstract. The same experiment is shared across the three monoamine PMs, not independent replication.
- Almonds — supplies Vitamin B2; verified; form not known. Nuts, almonds
Composition provenance
USDA SR Legacy April 2018
- Beef — supplies Vitamin B2; verified; raw. Beef, ground, 85% lean meat / 15% fat, raw (Includes foods for USDA's Food Distribution Program)
Composition provenance
USDA SR Legacy April 2018
- Broccoli — supplies Vitamin B2; verified; raw. Broccoli, raw
Composition provenance
USDA SR Legacy April 2018
- Kale — supplies Vitamin B2; verified; raw. Kale, raw
Composition provenance
USDA SR Legacy April 2018
- Milk — supplies Vitamin B2; verified; form not known. Milk, whole, 3.25% milkfat, with added vitamin D
Composition provenance
USDA SR Legacy April 2018
- Nori — supplies Vitamin B2; verified; dried. Purple laver (Porphyra spp.), dried, toasted
Composition provenance
MEXT Standard Tables of Food Composition in Japan (2023 supplement), food 09004
- Nutritional Yeast — supplies Vitamin B2; verified; dried. Marigold Engevita Nutritional Yeast Flakes with B12, dried inactive Saccharomyces cerevisiae
Composition provenance
Marigold Health Foods label
- Quinoa — supplies Vitamin B2; verified; uncooked. Quinoa, uncooked
Composition provenance
USDA SR Legacy April 2018
- Salmon Roe — supplies Vitamin B2; verified; form not known. Chum salmon (Oncorhynchus keta), salted roe (ikura)
Composition provenance
MEXT Standard Tables of Food Composition in Japan (2023 supplement), food 10140
- Spinach — supplies Vitamin B2; verified; raw. Spinach, raw
Composition provenance
USDA SR Legacy April 2018
Enzyme identity does not quantify tissue cofactor supply or flux after a meal.
Dependencies: Functional RFK; ATP and divalent metal availability
FAD production and enzyme loading depend on cellular context; no fixed food-to-FAD yield is inferred.
Dependencies: Functional FLAD1 FAD synthase; ATP and divalent metal availability
Vitamin B2 → Riboflavin kinase (RFK) phosphorylates riboflavin to FMN using ATP. → Flavin mononucleotide (FMN)
BRS2-FM1-PM1: Recycle homocysteine to methionine through folate and B12 so methyl-donor supply and homocysteine control stay supported.
Existing admission: Type A / derived; versioned-assessment. Production context for an already admitted substrate; no new metabolite-to-PM relationship is admitted.
Foundational human-enzyme cofactor provenance supports capacity; it is not a measurement of dietary riboflavin-induced remethylation flux, brain methylation or benefit above adequacy. FMN is also required; FAD is the endpoint of the displayed activation chain, not its sole functional cofactor.
- Almonds — supplies Vitamin B2; verified; form not known. Nuts, almonds
Composition provenance
USDA SR Legacy April 2018
- Beef — supplies Vitamin B2; verified; raw. Beef, ground, 85% lean meat / 15% fat, raw (Includes foods for USDA's Food Distribution Program)
Composition provenance
USDA SR Legacy April 2018
- Broccoli — supplies Vitamin B2; verified; raw. Broccoli, raw
Composition provenance
USDA SR Legacy April 2018
- Kale — supplies Vitamin B2; verified; raw. Kale, raw
Composition provenance
USDA SR Legacy April 2018
- Milk — supplies Vitamin B2; verified; form not known. Milk, whole, 3.25% milkfat, with added vitamin D
Composition provenance
USDA SR Legacy April 2018
- Nori — supplies Vitamin B2; verified; dried. Purple laver (Porphyra spp.), dried, toasted
Composition provenance
MEXT Standard Tables of Food Composition in Japan (2023 supplement), food 09004
- Nutritional Yeast — supplies Vitamin B2; verified; dried. Marigold Engevita Nutritional Yeast Flakes with B12, dried inactive Saccharomyces cerevisiae
Composition provenance
Marigold Health Foods label
- Quinoa — supplies Vitamin B2; verified; uncooked. Quinoa, uncooked
Composition provenance
USDA SR Legacy April 2018
- Salmon Roe — supplies Vitamin B2; verified; form not known. Chum salmon (Oncorhynchus keta), salted roe (ikura)
Composition provenance
MEXT Standard Tables of Food Composition in Japan (2023 supplement), food 10140
- Spinach — supplies Vitamin B2; verified; raw. Spinach, raw
Composition provenance
USDA SR Legacy April 2018
Enzyme identity does not quantify tissue cofactor supply or flux after a meal.
Dependencies: Functional RFK; ATP and divalent metal availability
Vitamin B2 → Riboflavin kinase (RFK) phosphorylates riboflavin to FMN using ATP. → FLAD1 FAD synthase adenylates FMN with ATP to form FAD. → Flavin adenine dinucleotide (FAD)
BRS2-FM1-PM1: Recycle homocysteine to methionine through folate and B12 so methyl-donor supply and homocysteine control stay supported.
Existing admission: Type A / derived; versioned-assessment. The complete derived relationship is admitted for this PM.
Foundational human-enzyme cofactor provenance supports capacity; it is not a measurement of dietary riboflavin-induced remethylation flux, brain methylation or benefit above adequacy. FMN is also required; FAD is the endpoint of the displayed activation chain, not its sole functional cofactor.
- Almonds — supplies Vitamin B2; verified; form not known. Nuts, almonds
Composition provenance
USDA SR Legacy April 2018
- Beef — supplies Vitamin B2; verified; raw. Beef, ground, 85% lean meat / 15% fat, raw (Includes foods for USDA's Food Distribution Program)
Composition provenance
USDA SR Legacy April 2018
- Broccoli — supplies Vitamin B2; verified; raw. Broccoli, raw
Composition provenance
USDA SR Legacy April 2018
- Kale — supplies Vitamin B2; verified; raw. Kale, raw
Composition provenance
USDA SR Legacy April 2018
- Milk — supplies Vitamin B2; verified; form not known. Milk, whole, 3.25% milkfat, with added vitamin D
Composition provenance
USDA SR Legacy April 2018
- Nori — supplies Vitamin B2; verified; dried. Purple laver (Porphyra spp.), dried, toasted
Composition provenance
MEXT Standard Tables of Food Composition in Japan (2023 supplement), food 09004
- Nutritional Yeast — supplies Vitamin B2; verified; dried. Marigold Engevita Nutritional Yeast Flakes with B12, dried inactive Saccharomyces cerevisiae
Composition provenance
Marigold Health Foods label
- Quinoa — supplies Vitamin B2; verified; uncooked. Quinoa, uncooked
Composition provenance
USDA SR Legacy April 2018
- Salmon Roe — supplies Vitamin B2; verified; form not known. Chum salmon (Oncorhynchus keta), salted roe (ikura)
Composition provenance
MEXT Standard Tables of Food Composition in Japan (2023 supplement), food 10140
- Spinach — supplies Vitamin B2; verified; raw. Spinach, raw
Composition provenance
USDA SR Legacy April 2018
Enzyme identity does not quantify tissue cofactor supply or flux after a meal.
Dependencies: Functional RFK; ATP and divalent metal availability
FAD production and enzyme loading depend on cellular context; no fixed food-to-FAD yield is inferred.
Dependencies: Functional FLAD1 FAD synthase; ATP and divalent metal availability
Vitamin B2 → Riboflavin kinase (RFK) phosphorylates riboflavin to FMN using ATP. → Flavin mononucleotide (FMN)
BRS3-FM2-PM6: Regenerate vitamin and thiol antioxidants across networked systems so endogenous defence capacity is sustained.
Existing admission: Type A / derived; versioned-assessment. Production context for an already admitted substrate; no new metabolite-to-PM relationship is admitted.
Human red-cell enzyme evidence supports flavin-dependent capacity. It does not establish neuronal or whole-body recycling flux, benefit above adequacy, or equivalence between an ordinary food and a 5 mg/day supplement.
- Almonds — supplies Vitamin B2; verified; form not known. Nuts, almonds
Composition provenance
USDA SR Legacy April 2018
- Beef — supplies Vitamin B2; verified; raw. Beef, ground, 85% lean meat / 15% fat, raw (Includes foods for USDA's Food Distribution Program)
Composition provenance
USDA SR Legacy April 2018
- Broccoli — supplies Vitamin B2; verified; raw. Broccoli, raw
Composition provenance
USDA SR Legacy April 2018
- Kale — supplies Vitamin B2; verified; raw. Kale, raw
Composition provenance
USDA SR Legacy April 2018
- Milk — supplies Vitamin B2; verified; form not known. Milk, whole, 3.25% milkfat, with added vitamin D
Composition provenance
USDA SR Legacy April 2018
- Nori — supplies Vitamin B2; verified; dried. Purple laver (Porphyra spp.), dried, toasted
Composition provenance
MEXT Standard Tables of Food Composition in Japan (2023 supplement), food 09004
- Nutritional Yeast — supplies Vitamin B2; verified; dried. Marigold Engevita Nutritional Yeast Flakes with B12, dried inactive Saccharomyces cerevisiae
Composition provenance
Marigold Health Foods label
- Quinoa — supplies Vitamin B2; verified; uncooked. Quinoa, uncooked
Composition provenance
USDA SR Legacy April 2018
- Salmon Roe — supplies Vitamin B2; verified; form not known. Chum salmon (Oncorhynchus keta), salted roe (ikura)
Composition provenance
MEXT Standard Tables of Food Composition in Japan (2023 supplement), food 10140
- Spinach — supplies Vitamin B2; verified; raw. Spinach, raw
Composition provenance
USDA SR Legacy April 2018
Enzyme identity does not quantify tissue cofactor supply or flux after a meal.
Dependencies: Functional RFK; ATP and divalent metal availability
Vitamin B2 → Riboflavin kinase (RFK) phosphorylates riboflavin to FMN using ATP. → FLAD1 FAD synthase adenylates FMN with ATP to form FAD. → Flavin adenine dinucleotide (FAD)
BRS3-FM2-PM6: Regenerate vitamin and thiol antioxidants across networked systems so endogenous defence capacity is sustained.
Existing admission: Type A / derived; versioned-assessment. The complete derived relationship is admitted for this PM.
Human red-cell enzyme evidence supports flavin-dependent capacity. It does not establish neuronal or whole-body recycling flux, benefit above adequacy, or equivalence between an ordinary food and a 5 mg/day supplement.
- Almonds — supplies Vitamin B2; verified; form not known. Nuts, almonds
Composition provenance
USDA SR Legacy April 2018
- Beef — supplies Vitamin B2; verified; raw. Beef, ground, 85% lean meat / 15% fat, raw (Includes foods for USDA's Food Distribution Program)
Composition provenance
USDA SR Legacy April 2018
- Broccoli — supplies Vitamin B2; verified; raw. Broccoli, raw
Composition provenance
USDA SR Legacy April 2018
- Kale — supplies Vitamin B2; verified; raw. Kale, raw
Composition provenance
USDA SR Legacy April 2018
- Milk — supplies Vitamin B2; verified; form not known. Milk, whole, 3.25% milkfat, with added vitamin D
Composition provenance
USDA SR Legacy April 2018
- Nori — supplies Vitamin B2; verified; dried. Purple laver (Porphyra spp.), dried, toasted
Composition provenance
MEXT Standard Tables of Food Composition in Japan (2023 supplement), food 09004
- Nutritional Yeast — supplies Vitamin B2; verified; dried. Marigold Engevita Nutritional Yeast Flakes with B12, dried inactive Saccharomyces cerevisiae
Composition provenance
Marigold Health Foods label
- Quinoa — supplies Vitamin B2; verified; uncooked. Quinoa, uncooked
Composition provenance
USDA SR Legacy April 2018
- Salmon Roe — supplies Vitamin B2; verified; form not known. Chum salmon (Oncorhynchus keta), salted roe (ikura)
Composition provenance
MEXT Standard Tables of Food Composition in Japan (2023 supplement), food 10140
- Spinach — supplies Vitamin B2; verified; raw. Spinach, raw
Composition provenance
USDA SR Legacy April 2018
Enzyme identity does not quantify tissue cofactor supply or flux after a meal.
Dependencies: Functional RFK; ATP and divalent metal availability
FAD production and enzyme loading depend on cellular context; no fixed food-to-FAD yield is inferred.
Dependencies: Functional FLAD1 FAD synthase; ATP and divalent metal availability








