While the only truly reliable weight loss diet is to eat fewer calories than you consume, http://www.livestrong.com/article/367537-reliable-diet-weight-loss-programs/ will give you some ideas about how to manage your weight through diet and exercise.
Low carb diets are a quick way to lose weight, although sometimes it has side effects. Consult your doctor first, but here is a website for more details: http://lowcarbdiets.about.com/od/whattoeat/What_Foods_To_Eat_on_a_Low_Carb_Diet.htm
Information can be found online for most crash diets. Crash diets include things like the grapefruit diet and cabbage soup diet. Most crash diets only have short term results and are not meant for long term use.
There are many great sites for information on hypoglycemic diets, such as www.glycemicedge.com and www.hypoglycemia.asn.au. Also, check out www.hypoglycemia-diet-plan.com
Are you trying to gain weight? High protein diets can help build muscle and keep the body strong. I highly recommend bodybuilding.com for all your high protein diet questions.
I have a perfect solution for you. I have been in the same situation before and I can tell you there is a website that has helped me through it all. If your a teenager, you should go to www.sparkteens.com, if your an adult go to www.sparkpeople.com. Not only do those websites both have a body weight index, but they also help you with every aspect of losing weight!
That can be a great way of losing weight, as long as you stick with it. You can find tons more information on the subject here: http://www.bariatricweightloss.com/FAQ.html
If you want to find information on laparpsicpic sleeve gastrectomy online, the best website to go on is my weight loss surgery.com it will give you amazing information.
Nutritionsystems.com is a great website to learn about the different types of diet plans and nutritional systems. It weighs the pros and cons of all the diets to help you choose.
http://www.everydiet.org/weight_loss_diet.htm has some diet information where you can read up on different diets. http://www.freediettips.com/diet_plan_summary.htm also has some dieting info.
There are many low carb diets in the world today, and with the use of internet you can easily find what you are looking for. Here is a website that gives info on a variety of low carb diets: everydiet.org/diet/low-carb-diets
There is a few sites that will give you some vauable information on bariatic weight lose some of the sites listed are northshore.org, and surgicallyslim.com
The most effective diets are definitely not fast. Even if you manage to lose weight very fast, your body naturally holds onto the pounds as it thinks you're starving. Remember to monitor your calorie intake, and daily exercising is the best way to go.