Okay so this is some really bad (unhealthy) advice BUT if you are really hungry and don’t want to eat actual food, drink coffee, it’ll curb your appetite. Such unhealthy advice, I know. Let me contextualize it.
Say you have eaten more than enough at a meal but you still want more. You know you are either just “eye-hungry” or “mouth-hungry” or emotionally eating or all of the above but you’ve had your fill and gotten all the calories and nutrients that you need for that meal. Have a cup of coffee with even a little milk and sugar, if that is how you drink it. The hungry really does subside for several hours. I am always amazed how well this trick works.
Now there is a whole lot wrong with this advice, not to mention that it borders on anorexia-type tricks if you use coffee to replace actual meals and needed calories/nutrients. For instance, caffeine is not that great for you even if there have been some studies on performance: to me, being a slave to any substance, even just caffeine, isn’t great. (I have never tried this trick with decaf.). Plus, I would like to think that you shouldn’t have to or need to use anything to suppress hunger, coffee included. You should be able to eat when your body says it is hungry and stop when it is full. But, in my case, 40lbs or so left to go after losing 55lbs, I still haven’t regained a good hungry-full balance yet.
Someone long ago told me about how models and actresses use this coffee/appetite-suppressing trick. I certainly don’t want to take too many pointers from those in industries where women do all sorts of unhealthy things to lose weight. But a cup of joe once in awhile after a meal when I know I want more for other reasons than nutrition, well, maybe that is okay. At least today after lunch it is.
Losing That Pregnancy Weight (and then some) 
Yes, caffeine is a natural appetite supressant, but it short lived. Caffeine also increases your metabolism and is a diuretic, which means it stimulates urination so you will pass more than the cup of coffee that you have consumed. But, caffeine is also high in calories and will rob your body of essential vitamins and minerals, especially calcium. So, while caffeine can suppress your appetite, don’t be fooled into drinking more of it, as over time the benefits will be outweighed by its negative attributes.
As always the golden rule is, “everything in moderation.”
Potential Benefits of Caffeine
Consuming caffeine may reduce your appetite for a brief period, according to Katherine Zeratsky, a registered dietitian affiliated with MayoClinic.com. It may also slightly boost your metabolism, or the rate at which your body utilizes calories for fuel. Because many caffeinated beverages, including black coffee, unsweetened tea and diet soft drinks, are devoid of calories, they may also help you cut back on calories if you consume them in place of higher-calorie beverages such as regular soft drinks, wine, beer or fruit punch. It is also common to mistake thirst for hunger, so if you quench your perceived hunger pangs with a caffeinated beverage, your cravings may dissipate.
Potential Risks of Caffeine
Some caffeinated beverages, such as regular soft drinks and blended coffee drinks, are high in sugar, calories or fat. And consuming more than 500 mg of caffeine per day — the amount found in roughly five 8-oz. cups of coffee — may cause anxiety, insomnia, irritability, restlessness, upset stomach, rapid heartbeat and muscle tremors, according to MayoClinic.com. Stimulant-containing dietary supplements are associated with similar risks.
Read more: http://www.livestrong.com/article/480188-is-caffeine-an-appetite-suppressant/#ixzz2O1lgyGgJ
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