Active ingredients in advertisement claims that increased during the spread of COVID-19 in 2020
| Function | Ingredient (no*) |
| Infection prevention | Lactic acid bacteria, for example, Lactobacillus pentosus strain S-PT84, Lactobacillus delbrueckii subspp. bulgaricus OLL1073R-1 (17), lactoferrin (7), propolis (7), royal jelly (4), methylglyoxal (3), taurine (3), amino acids, for example, cystine, theanine (3) |
| Joint function | Type II collagen (89), glucosamine (86), chondroitin (83), proteoglycan (61), quercetin (55), anserine (44), vitamin D (40), hyaluronic acid (31), imidazole dipeptide (26), methylsulfonylmethane (4), BCAA (valine, leucine, isoleucine) (1) |
| Digestive function | Lactic acid bacteria, for example, Lactobacillus bifidus, Lactobacillus brevis, Lactobacillus gasseri (93), inulin (27), chlorogenic acid (14), dietary fibre (11), lactoferrin (9) |
*A single product often contained multiple active ingredients; thus, the total numbers for each ingredient in table 3 do not match those in table 2.