I had no clue who this Samantha Mumba person was so had a quick glance at her insta, she seems to have form for very poor advice:
samanthamumbaThis is a few of the delicious juices I’ve been drinking from @thejuiceworksireland for the past few days....highly recommend if you’re thinking of doing a cleanse or just replacing one or two meals a day (which is what I’ve done) they are SO yummy😋 This isn’t an ad just sharing a yummy healthy find✨
Yes, very sensible to replace one or two meals with a juice 
You'd think the brand would at least rectify such reckless advice, nope, just a thanks for enjoying our products.