This comes up frequently, and it is worth separating the classical position from how I actually apply it in practice.
Ayurveda frames sustainable weight management around agni (digestive fire) and the quality of medas dhatu (fat tissue metabolism), not calorie counting alone. A person can eat "correctly" by conventional standards and still struggle if their digestive fire is weak.
This is why the first step in my clinic is rarely a diet chart — it is assessing what is actually happening with digestion, elimination, and sleep, since all three drive metabolic outcomes more than most people expect.
Herbal support (such as properly sourced Guggulu preparations) can help, but it is an adjunct to correcting the underlying pattern, not a substitute for it.
Every patient's presentation is different, so this is general clinical guidance rather than a substitute for an individual consultation — Dr. Rohan Gupta, BAMS, would want to examine your specific history before recommending a protocol.