Wild, B-Perfect Cosmetics, Dylan Oaks and Califia Farms were found to be in breach of the ASA code.
It's important for the public to know when they're being advertised to, according to the Advertising Standard's Authority.
In its latest Complaints Bulletin, six of the sixteen cases that were upheld in full came from posts on influencer's Instagram pages.
Wild, B-Perfect Cosmetics, Dylan Oaks and Califia Farms were found to be in breach of the ASA code.

Timolin Student Awarded For Sepsis Research
Kfm and Independent Radio Stations Launch Major Road Safety Promotion
Central Bank Reveals Average Time Of Four Years To Build House
Cost Of MetroLink Expected To Be Much Higher Than Estimated
Man Dies Following Two-Vehicle Collision On M4 In Enfield
Irish Rugby Legend Sets Off On Kildare Leg Of Nine-Marathon Charity Event
The 95th Edition Of The National Ploughing Championships Gets Underway This Morning
Occupied Territories Bill Comes Into Effect