Long-term studies of over 120,000 health professionals followed for up to 20 years showed french fries to be the most effective in increasing weight gain, followed by potato chips. For each daily serving of french fries weight gain per four year period was 3.35 pounds. Potato chips added 1.69 pound per daily serving over four years.
PositiveTip: Avoid fried foods that are high in fat. Try a baked potato with salsa or other low-fat toppings.