Garlic, Chromium and Weight Loss

I have a question about certain vitamins and herbs that I am taking. I started taking garlic, chromium picolinate, vitamin E, and have always taken a multi vitamin. My question is about the garlic and chromium. I have heard that these will help you with losing weight, but it seems that I have gained a few pounds. I don't think my eating habits have changed and I'm not overweight. I would just like to stay at a certain weight. Do these vitamins and herbs work well together, or is there something else I should take?

Garlic is used to help in weight loss as a digestive and as a circulatory enhancer, helping to keep fat from accumulating in the arteries. Since garlic is so beneficial to the heart, blood vessels and immunity, it is a good herb to continue with.
Chromium is used to promote weight loss for its function in stabilizing blood sugar imbalances. A deficiency is rare, but may be recognized by symptoms of hypoglycemia (e.g. constant hunger, fatigue, nervous tension, insomnia), diabetes (e.g. great thirst, weakness, loss of sensation in fingertips) or sweet cravings. If you do not have any of these symptoms, there may be no benefit in taking the supplement.
For general health and weight maintenance, a multivitamin along with a diet high in fresh fruit and vegetables, whole grains, beans and seeds and regular exercise consisting of half to three quarters of an hour at least five times a week should be sufficient.