I would suggest avoiding the supplements altogether. Most of them aside from vitamins, minerals, and some good protein supplements are crap. Key word is they are supplements and not anything to completely rely on. Instead figure out how your body responds to cardio and different types of foods.
For example, you said that you do cardio 3 days a week. But are you doing cardio for 20 mins? 45 mins? an hour? Also what is your heart rate? You need to keep an elevated heart rate for your age range for at least 20 mins to get any good effect. Search the net and you will find lots of information on heart rate ranges by age, etc. Also in general if you want more of an effect do more cardio activity. Maybe try 4 or even up to 6 days a week. Or if your doing 20 mins up it to 40 for your 3 days. I hope that makes sense.
Also your calories seem pretty low. I think you need around 1200 for women and about 1500 for men just to function. It is also possible you are taking in too little by eating 1600 then creating a deficit further by working out. You don't want to go into that starvation mode or your body will try to hang onto everything it can. The only time this seems to not be true is when you are very overweight / obese. It seems the body will do ok when in obese mode as there is way more than enough fat reserves.
Lastly look at where your calories come from. Everyone responds a little different to various foods. So track what you eat and weigh yourself regularly. I hope that helps. Good job on coming down from 260!
