Hi, thanks for using healthcare magic
Alot of persons who lose weight find it difficult to keep it off.
There is a national registry in the US called the national
weight loss registry that looks at the features shared by persons who are able to keep the weight off.
They have found : (1) most continue their dietary changes long term
(2) 78% eat breakfast daily
(3)75 % weigh themselves once a week
(4)62% watch less than 10 hours of tv or screen time a week
(5)90% exercise at least 1 hour a day
If you can lose the weight again either using the low fat/low calorie diet or the low
carbohydrate diet, employing the above methods would help you to keep it off.
You may want to consider enlisting the help of a bariatrician (weight loss doctor)
I hope this helps