Many doctors and dieters have found that taking certain supplements can help with weight loss.
Allen Fellheimer says that after struggling with his weight for as long as he can remember, at 69 he's never felt better.
"I'm living proof. You can exercise a lot and not lose any weight," he says.
With his cholesterol and blood sugars creeping up, he knew it was time to try something new.
Medical weight loss specialist Dr. Charles Seltzer advocates using any method you can, and he speaks from experience.
He was overweight and out of shape in his 20s and now, ten years later, competes in body building competitions.
Along with proper diet and exercise, he says an essential tool in the weight loss battle is nutritional supplements.
"I tell them and show them the research that by drinking a little bit of protein after your workout you can help with your fat loss and your body transformation," he says.
Like whey protein, creatine is the other supplement Dr. Seltzer introduces right away.
He says it helps build muscle.
"Anytime your building muscle you're burning more fat at rest and you're being healthier," he explains.
And there are many other supplements the doctor gradually introduces.
"Fish oil, for instance, in the absence of any diet or exercise changes can help a person put on lean muscle tissue and burn body fat," he says.
When you walk into a supplement store there are so many options out there.
How do you know which ones to buy and are they all safe?"
"They can be expensive and ineffective if they're not used right, and they can be dangerous for certain people. Before anybody starts a diet or exercise program they should be evaluated by a physician," Dr. Seltzer warns.
And supplements are not federally regulated.
Still, Allen is a believer.
He's 45 pounds lighter with a lot more muscle since starting with Dr. Seltzer a year ago.
Many people also believe green tea can support weight loss efforts.
The International Journal of Obesity found that green tea antioxidants known as catechins may increase metabolism.
Trying to avoid caffeine?
Fucoxanthin is an antioxidant found in edible brown seaweed like the kind used in miso soup.
It's a popular weight loss supplement and isn't a stimulant like caffeine or bitter orange.