SOCIAL MEDIA'S 70-UP ‘GRANDFLUENCERS' DEBUNKING AGING MYTHS

Joan MacDonald’s health was in shambles at age 71. She was overweight and on numerous medications with high cholesterol, rising blood pressure and kidney trouble.

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Her daughter, a fitness coach, warned that she’d wind up an invalid if she didn’t turn things around. She did, hitting the gym for the first time and learning to balance her diet with the help of a brand new tool, an iPhone.

Now 75, MacDonald is a hype beast for health with a bodybuilder’s physique and 1.4 million loyal followers on Instagram.

She’s among a growing number of “grand fluencers,” folks 70 and up who have amassed substantial followings on social media with the help of decades-younger fans.

“It’s so rare to find someone her age being able to do all these things,” said one of her admirers, 18-year-old Marianne Zapata of Larchmont, New York. “It’s just such a positive thing to even think about.”

Both aspirational and inspirational, older influencers are turning their digital platforms into gold.

MacDonald has paid partnerships with the sportswear and supplement brand Women’s Best, and the stress-busting device Sensate. And she just launched her own health and fitness app not so many years after learning how to use digital technology herself.

On TikTok, four friends who go by @oldgays — the youngest is 65 — have 2.2 million followers, including Rihanna. They have an endorsement deal with Grindr as they delight fans with their clueless answers to pop culture questions.