Yakult (ヤクルト, Yakuruto) is a Japanese sweetened probiotic milk beverage fermented with the bacteria strain Lacticaseibacillus casei Shirota.

Yakult's ingredients are water, skimmed milk, glucose-fructose syrup, sucrose, natural flavors (citrus), and live Lacticaseibacillus casei Shirota bacteria.

[3] In 2006, a panel appointed by the Netherlands Nutrition Center (Voedingscentrum) to evaluate a marketing request by Yakult found sufficient evidence to justify claims that drinking at least one bottle of Yakult per day might help improve bowel movements for people who tend to be constipated and might help maintain a healthy population of gut flora.

[4] In 2010, a European Food Safety Authority (EFSA) panel denied a request by the company to market Yakult as defending the upper respiratory tract against pathogens (in other words, protection against diseases like the common cold), finding the claim not supported by the evidence.

[20][21] In January 2020, professional sumo wrestler Takakeishō Takanobu appeared in a television commercial advertising Yakult 1000.