L. helveticus KLDS1.8701 shows strongest antifungal activity against Penicillium.
Antifungal activity was from organic acids and KLDS 1.8701 itself.
KLDS 1.8701 could extend the shelf-life of fermented soybean milk.
The addition of KLDS 1.8701 has no effect on properties of fermented soybean milk.