Bring 200 boxes of slimming coffee to the US

The absolute maximum personal exemption for US customs is 1600 USD, per comments you're likely at the $800 level coming from the Philipines. The value of your coffee appears to exceed both levels. You'll need to declare it regardless of value. You will also probably have to pay duty on it as the value of 200 boxes appears to exceed even the maximum limit.

It is also a food product. Since it is commercially packaged it appears to be generally allowed per these rules.

Finally, the product ingredients do not appear to include anything that is banned or regulated in the US.

You need to check the ingredient list very carefully. Some dieting products contain amphetamines or similar compounds that are restricted in the USA. Trying to import such products could get you in serious trouble. And even if they're legal, you will have to pay import duties on them, since 200 boxes is well above any 'personal use'.

Regardless of whether you can, don't. There is no sense in carrying questionable things in large quantities on your person when you will be going through the scrutiny of immigration and customs. Send them as a parcel by post or other shipping service where they'll be subject to minimal or no scrutiny and will not risk affecting your treatment at the border.