No. Doing so would most likely cause harm to the pet.
#1. Most supplements are scams. And, not all supplements are benign. They are not regulated by the FDA there is no way of knowing if the dosages are correct or that the ingredients are what appears on the label
#2 You should never give your pet any supplement, over the counter medication or apply ointments that are not approved for veterinary use, unless advised to do so by a veterinarian that has examined the pet, not someone on the internet.
A lot of ingredients that are used in human products can be toxic to animals.
Has the dog had a recent checkup? Annual exam with labs?
First step is to rule out medical causes for unexplained weight gain and see what your vet suggests.
Once medically cleared, feed measured amounts for meals with water added twice a day.
Take out for more walks, exercise, even if only for short walks around the block a few times a day. Assuming your vet agrees.
Just like with people, the best way to lose weight is to eat less, make more thoughtful dietary choices.
And, move more!
