Sweet potato benefits go beyond providing an affordable source of carbohydrates for Filipino households. Locally known as kamote, this widely grown root crop contains dietary fiber, vitamins, minerals, and plant compounds that contribute to a balanced diet. From supporting digestive health to providing nutrients associated with cardiovascular wellness, sweet potatoes deserve a closer look as researchers continue studying their potential health benefits.
Today, science is catching up to what traditional communities have known for generations: sweet potato is one of the most nutrient‑dense, disease‑preventive foods available, and its benefits extend far beyond basic nourishment.
A Natural GLP‑1 Booster
“The science behind how sweet potato does it is remarkable,” says Dr. Anthony “Tony” Leachon, one of the country’s most respected voices in public health. Known for his advocacy on preventive medicine and evidence‑based policy, Dr. Leachon has recently highlighted a surprising metabolic advantage of sweet potatoes.
“Sweet potatoes trigger GLP‑1—the same hormone Ozempic mimics—naturally,” he explains.
GLP‑1, or glucagon‑like peptide‑1, is a hormone produced in the small intestine after eating. It helps regulate blood sugar, slows digestion, and promotes satiety. Pharmaceutical GLP‑1 agonists like Ozempic are prescribed for type 2 diabetes and cardiovascular risk reduction.
But Dr. Leachon emphasizes that sweet potatoes stimulate the body’s own GLP‑1 response without medication.
This natural GLP‑1 boost may help explain why populations with sweet‑potato‑heavy diets exhibit extraordinary health outcomes.
Lessons from Okinawa and Papua New Guinea
Dr. Leachon points to the Okinawan people of Japan—famous for their longevity and low rates of heart disease and cancer. Historically, sweet potatoes make up as much as 90 percent of their diet.
“Okinawans ate sweet potatoes as up to 90% of their diet and had some of the lowest cardiovascular disease rates ever recorded,” he notes. Similar patterns appear among highland communities in Papua New Guinea, where sweet potatoes are also a dietary cornerstone.
These populations demonstrate that sweet potato is not merely a source of calories; it is a functional food that supports long-term health.
The Power of Resistant Starch
Starch makes up 50% to 80% of the dry weight of sweet potatoes. While refined starches can spike blood sugar, sweet potato starch behaves differently, especially when cooked, cooled, and reheated.
According to the US National Institutes of Health, refined starches break down rapidly into glucose. Sweet potatoes, however, can be prepared to maximize resistant starch, a type of carbohydrate that resists digestion in the small intestine.
“Resistant starch bypasses small intestine digestion and reaches the large intestine intact where gut bacteria ferment it into butyrate, GLP‑1, and short-chain fatty acids,” Dr. Leachon explains.
Butyrate is the primary fuel for colon cells and is linked to reduced inflammation, improved gut integrity, and lower risk of colon cancer. Short‑chain fatty acids also help regulate cholesterol synthesis and support metabolic health.
This means sweet potato does not merely feed the body—it feeds the microbiome, the ecosystem of beneficial bacteria increasingly recognized as central to overall health.
Color Matters: Purple vs. Orange
Sweet potatoes come in a spectrum of colors, each offering distinct health benefits.
“The color determines the benefit,” says Dr. Leachon.
· Purple sweet potatoes are rich in anthocyanins, potent antioxidants associated with brain protection, vascular health, and reduced inflammation.
· Orange sweet potatoes contain high levels of beta‑carotene, which the body converts to vitamin A. Beta‑carotene supports immunity, cardiovascular health, and eye function.
Dr. Leachon recommends rotating both varieties daily to obtain a full spectrum of antioxidants.
A Natural Defense Against Inflammation and Cholesterol
Sweet potatoes are naturally cholesterol‑free and contain no saturated fat. Their phytonutrients help reduce vascular inflammation, while antioxidants prevent LDL oxidation—the process that makes cholesterol harmful.
Dr. Leachon cites a cardiovascular study showing that more than 1,000 men who suffered heart attacks were deficient in lycopene and beta‑carotene. While sweet potatoes contain only trace amounts of lycopene, they are rich in beta‑carotene, making them a valuable food for heart protection.
Filipino Research Confirms Cholesterol‑Lowering Benefits
Local research reinforces these findings. The Food and Nutrition Research Institute (FNRI) of the Department of Science and Technology recommends including kamote and other root crops in daily meals to help control cholesterol.
A study led by Dr. Trinidad P. Trinidad found that daily intake of root crops significantly lowered LDL (“bad”) cholesterol levels. The subjects—aged 30 to 55, non-smokers, and not on medication—were fed root crops for two weeks. Their cholesterol levels stabilized and improved.
“Root crops are able to lower bad cholesterol levels because of their dietary fiber content,” Dr. Trinidad explains.
Dietary fiber ferments in the colon, producing short‑chain fatty acids such as:
· Butyrate, which reduces colon cancer risk
· Propionate, which helps prevent cholesterol synthesis.
Among the root crops tested, sweet potato and cassava showed the strongest cholesterol‑lowering effects.
International Recognition as a Healing Food
Globally, sweet potatoes have earned endorsements from major health organizations. The North Carolina Stroke Association, American Cancer Society, and American Heart Association all recognize sweet potatoes for their disease‑preventive qualities. Many consider sweet potato a “superfood that heals.”
The North Atlantic Human Nutrition Research Center on Aging lists sweet potato among the world’s healthiest foods due to its exceptionally high vitamin A content. A medium-sized sweet potato contains:
- 2.15 g protein
- 31.56 g net carbohydrates
- 3.8 g dietary fiber
- 265.2 mg potassium and
- 29.51 mg vitamin C
American nutritionists note that sweet potatoes provide nearly twice the recommended daily allowance of vitamin A, 42% of the RDA for vitamin C, and four times the RDA for beta‑carotene.
A cup of cooked sweet potato (about 200 grams) surpasses broccoli and cabbage in vitamins A and C, iron, and calcium. These nutrients help reduce inflammation associated with asthma, osteoarthritis, and rheumatoid arthritis.
A Nutritional Giant Hidden in Plain Sight
Despite its impressive nutritional profile, kamote has long been stigmatized in Filipino culture. It is often associated with poverty and used in derogatory expressions—someone who is “nangangamote” is seen as lagging behind.
But science tells a different story. Among root crops, sweet potato has the highest vitamin A content. Eating yellow or orange varieties supports healthy skin, eye function, and the linings of the respiratory, urinary, and intestinal tracts. Vitamin A also protects arterial walls from hardening, reducing cardiovascular risk.
Sweet potato is almost fat‑free, rich in fiber, and packed with antioxidants. It supports metabolic health, gut health, immune function, and cardiovascular protection – all in one affordable, accessible food.
Time to Change the Narrative
In an era when chronic diseases are rising and pharmaceutical treatments are costly, sweet potatoes offer a powerful, natural, and culturally familiar solution. They are grown across the Philippines, inexpensive, and versatile in cooking.
Dr. Leachon’s message is clear: sweet potatoes deserve a place at the center of Filipino diets—not as a symbol of poverty, but as a symbol of health, resilience, and scientific wisdom.
It is time to rethink kamote—not as a “low-class” crop, but as a superfood that can help transform public health in the Philippines.
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