By Jessica DiNapoli

NEW YORK (Reuters) - Procter & Gamble has been revamping its marketing and line-up of influencers on fast-growing Chinese shopping app Douyin in recent months, helping its Pantene shampoo lead growth in hair care on the platform, executives said Thursday at an investor day.

The Cincinnati-based company's investments in better packaging for Pantene in China, and improved marketing on how much to use, has led to share growth online, the company's head of beauty, Alex Keith, said at the event.

"We've grown online share for more than a year now and our portfolio is leading category growth on Douyin, the fastest growing online retailer in China," Keith said. P&G's beauty business globally made up about 18% of its $84 billion in net sales in its fiscal year ended in June.

Influencers on Douyin like Ni Bi Yi, a young mom, and Chou Dan, known for her jokes, tout Pantene's jasmine fragrance and ability to repair their hair, according to posts on the China-based sister app of TikTok.

P&G is looking for ways to stoke sales in China's sputtering economy, where its revenue was down 15% in the quarter ended September 30, dragging on the entire company. Even as P&G sees positive trends in haircare on Douyin, the higher-end categories the company competes in overall in China are down due to low consumer confidence, Keith said Thursday.

To rebuild sales, the company is offering more of its haircare and beauty brands on Douyin, and other fast-growing e-commerce platforms, P&G executives told Asian investors in August, according to a research note from the bank.

It is also building brand houses on Douyin, like its page for skincare brand Olay, and putting influencers on its payroll, according to the JP Morgan note.

Those moves are aimed at giving P&G more control over brand messaging as it faces competitors such as Unilever's Dove and local brands.

SHOPPING VIA LIVESTREAM

Chinese consumers are more frequently shopping on the app, which offers livestreamed videos, and are abandoning the brick-and-mortar stores where P&G built up its presence over decades, seeking to become essential in China's growing middle class.

Influencers on Douyin entice shoppers with deep discounts, and consumers in China believe they will get the cheapest price on livestreams. P&G executives have said they try to balance this approach with the company's long-term strategy of marketing products worth higher prices.

On Olay's flagship Douyin store this week, influencers hosting livestream videos offer 19.3% off a 260g-size body lotion, according to a Reuters review of Douyin. A whitening set, which lightens skin tone, is nearly 30% off.