Are You Buying Artificially Coloured Sweet Potatoes? Here’s How to Spot the Real Ones at Home and 6 Simple Ways to Enjoy Them

Sweet potatoes have quietly moved from being a seasonal street-side snack to a year-round superfood staple. From fitness enthusiasts to nutrition experts, everyone seems to recommend this humble root vegetable for its impressive nutritional profile and versatility. It fits effortlessly into meals throughout the day—breakfast bowls, hearty lunches, evening snacks, and even desserts.

However, the growing popularity of sweet potatoes has also brought an unfortunate side effect: adulteration in the market. With demand soaring, some sellers resort to unsafe practices to make sweet potatoes appear more vibrant and appealing, putting consumers’ health at risk.

Adulteration in Sweet Potatoes: What’s the Concern?

According to the Food Safety and Standards Authority of India (FSSAI), sweet potatoes sold in markets are sometimes treated with Rhodamine, a synthetic chemical dye. This dye is commonly used in textiles, paper inks, and laboratory settings and is strictly not approved for food use.

Reports, including those highlighted by the FSSAI blog, warn that Rhodamine is unfit for food processing, distribution, or preparation. Long-term exposure may lead to serious health issues such as organ damage and carcinogenic effects. This makes it crucial for consumers to identify adulterated produce before consumption.

How to Check the Purity of Sweet Potatoes at Home

FSSAI recommends a simple and effective home test that requires minimal effort and no special equipment:

Step 1: Take a cotton ball and soak it in either water or vegetable oil.

Step 2: Rub the cotton ball gently on the outer surface of the sweet potato.

Step 3: If the sweet potato is pure and unadulterated, the cotton ball will show no colour change.

Step 4: If the cotton ball turns reddish or violet, it indicates the presence of artificial dye and possible adulteration.

This quick test can help you make safer choices for you and your family.

Nutritional Value of Sweet Potato

As per the USDA, 100 grams of boiled sweet potato provides approximately:

80–86 calories

20.1 g carbohydrates

4.2 g natural sugars

4 g dietary fibre

1.0 g protein

0.1 g fat

700 µg Vitamin A

24 mg Vitamin C

337 mg potassium

30 mg calcium

Health Benefits of Sweet Potatoes

Sweet potatoes are especially rich in Vitamin A, which supports eye health, immunity, and skin function. Research also suggests they contain powerful antioxidants such as carotenoids and anthocyanins, which help neutralize free radicals, reduce oxidative stress, and may lower the risk of chronic conditions like heart disease, cancer, and diabetes.

Purple sweet potatoes, in particular, have been studied for their potential role in regulating blood glucose levels by influencing liver glucose metabolism. When boiled, sweet potatoes have a relatively low glycaemic index, making them a suitable carbohydrate choice for people managing blood sugar levels.

Their high dietary fibre content aids digestion, supports healthy gut bacteria, and helps prevent constipation. Certain fibres in sweet potatoes also act as prebiotics, nourishing beneficial gut microbes and contributing to long-term digestive health.

6 Easy and Delicious Sweet Potato Dishes

1. Sweet Potato Chips

Thinly sliced sweet potato rounds can be air-fried, deep-fried, or even microwaved to create a crunchy and satisfying snack.

2. Sweet Potato Stew

Boiled sweet potato cubes simmered in a tangy gravy made with tomatoes, onions, tamarind, jaggery, and aromatic spices.

3. Roasted Sweet Potato

Evenly sliced sweet potatoes tossed in oil and ground spices, then roasted until crisp on the outside and tender inside.

4. Honey-Cinnamon Sweet Potato

A quick pan-tossed snack using boiled sweet potatoes coated with honey, oil, salt, pepper, and a dash of cinnamon powder.

5. Stuffed Sweet Potato

A filling and wholesome meal where baked or boiled sweet potatoes are stuffed with cheese, black beans, corn, and avocado.

6. Loaded Sweet Potato Skins

Air-fried skins topped with roasted and mashed sweet potatoes, cheese, bacon, milk, oil, salt, and pepper for a rich, indulgent treat.