Anytime I see a thread like this I have to laugh.
Seems to you, huh? Have you actually LOOKED UP the nutritional value of potatoes, or are you just making what we call a WAG (wild-assed guess)?
I'm pretty sure you haven't done any research at all.
The most cursory look would show you this:
A medium white potato contains the following:
Cals 77
Carbohydrates 19 g
Starch 15 g
Dietary fiber 2.2 g
Fat 0.1 g
Protein 2 g
Thiamine (Vit. B1) 0.08 mg (6%)
Riboflavin (Vit. B2) 0.03 mg (2%)
Niacin (Vit. B3) 1.1 mg (7%)
Vitamin B6 0.25 mg (19%)
Vitamin C 20 mg (33%)
Calcium 12 mg (1%)
Iron 1.8 mg (14%)
Magnesium 23 mg (6%)
Phosphorus 57 mg (8%)
Potassium 421 mg (9%)
A medium sweet potato has this:
Cals 86
Carbohydrates 20.1 g
Starch 12.7 g
Sugars 4.2 g
Dietary fibre 3.0 g
Fat 0.1 g
Protein 1.6 g
Vitamin A equiv. 709 ?g (79%)
- beta-carotene 8509 ?g (79%)
- lutein and zeaxanthin 0 ?g
Thiamine (Vit. B1) 0.1 mg (8%)
Riboflavin (Vit. B2) 0.1 mg (7%)
Niacin (Vit. B3) 0.61 mg (4%)
Pantothenic acid (B5) 0.8 mg (16%)
Vitamin B6 0.2 mg (15%)
Folate (Vit. B9) 11 ?g (3%)
Vitamin C 2.4 mg (4%)
Calcium 30.0 mg (3%)
Iron 0.6 mg (5%)
Magnesium 25.0 mg (7%)
Phosphorus 47.0 mg (7%)
Potassium 337 mg (7%)
Sodium 55 mg (2%)
Zinc 0.3 mg (3%)
I found both of these by Googling "nutritional value potato" and "nutritional value sweet potato". Took me less than 5 mins to find them.