A liquid composition comprising a sweet enhancer having the structural formula and a phenol-based antioxidant, or a salt or solvate thereof, as a photostabilizer; and optionally an ingestibly acceptable excipient; wherein the photostabilizer is selected from the group consisting of caffeic acid, ferulic acid, sinapic acid, rosmarinic acid, chlorogenic acid, cichoric acid, caftaric acid, echinacoside, myricitrin, myricetin, apigenin, kaempferol, rhoifolin, luteolin, diosmin, apiin, morin, neodiosmin, quercetin, rutin, cupressuflavone, datiscetin, diosmetin, fisetin, galangin, gossypetin, geraldol, hinokiflavone, scutellarein, flavonol, primuletin, pratol, robinetin, quercetagetin, sinensetin, chrysoeriol, isorhamnetin, vitexin, isoquercitrin, daidzin, daidzein, biochamin A, prunetin, genistin, glycitein, glycitin, genistein, 6,7,4'-trihydroxyisoflavone, 7,3',4'-trihydroxyisoflavone, chromone, visnagin, sophorachromone A, volkensiachromone, sawarachromone, mycochromone, 2-carboxyethenyl-5,7-dihydroxychromone, 7-hydroxy-5-(4-hydroxy-2-oxopentyl)-2-methylchromone-7-O-beta-D-glucopyranoside, 8-glucosyl-5,7-dihydroxy-2- (1-methylpropyl)chromone, diacromone, hymecromone, 5-hydroxy-2- methylchromone, cassiachromone, coumarin, coumestrol, dalbergin, daphnetin, esculetin, citropten, umbelliferone, scopoletin, xanthotoxol, psoralen, bergapten, fraxetin, butein, phloridzin, echinatin, marein, isoliquiritigenin, phloretin, polyhydroxychalcones, pholoretin, trilobatin, naringin dihydrochalcone, neohesperidin dihydrochalcone, naringenin, homoeriodictyol, hesperetin, myricitrin, enzymatically modified isoquercitrin (EMIQ), and a combination thereof; wherein the photostabilizer is present in an amount of 10 ppm to 500 ppm. a sweet enhancer having the structural formula and a phenol-based antioxidant, or a salt or solvate thereof, as a photostabilizer; and optionally an ingestibly acceptable excipient; wherein the photostabilizer is selected from the group consisting of caffeic acid, ferulic acid, sinapic acid, rosmarinic acid, chlorogenic acid, cichoric acid, caftaric acid, echinacoside, myricitrin, myricetin, apigenin, kaempferol, rhoifolin, luteolin, diosmin, apiin, morin, neodiosmin, quercetin, rutin, cupressuflavone, datiscetin, diosmetin, fisetin, galangin, gossypetin, geraldol, hinokiflavone, scutellarein, flavonol, primuletin, pratol, robinetin, quercetagetin, sinensetin, chrysoeriol, isorhamnetin, vitexin, isoquercitrin, daidzin, daidzein, biochamin A, prunetin, genistin, glycitein, glycitin, genistein, 6,7,4'-trihydroxyisoflavone, 7,3',4'-trihydroxyisoflavone, chromone, visnagin, sophorachromone A, volkensiachromone, sawarachromone, mycochromone, 2-carboxyethenyl-5,7-dihydroxychromone, 7-hydroxy-5-(4-hydroxy-2-oxopentyl)-2-methylchromone-7-O-beta-D-glucopyranoside, 8-glucosyl-5,7-dihydroxy-2- (1-methylpropyl)chromone, diacromone, hymecromone, 5-hydroxy-2- methylchromone, cassiachromone, coumarin, coumestrol, dalbergin, daphnetin, esculetin, citropten, umbelliferone, scopoletin, xanthotoxol, psoralen, bergapten, fraxetin, butein, phloridzin, echinatin, marein, isoliquiritigenin, phloretin, polyhydroxychalcones, pholoretin, trilobatin, naringin dihydrochalcone, neohesperidin dihydrochalcone, naringenin, homoeriodictyol, hesperetin, myricitrin, enzymatically modified isoquercitrin (EMIQ), and a combination thereof; wherein the photostabilizer is present in an amount of 10 ppm to 500 ppm.