By NAN Staff Reporter | NewsAmericasNow.com
News Americas, NEW YORK, NY, Sat. July 11, 2026: A viral Instagram carousel has been circulating claiming a list of Caribbean “Superfoods” including root vegetables and staples – cassava, breadfruit, sweet potato, yam, pigeon peas, taro, christophine, green banana, canna edulis and air potato – are backed by science. Some of it holds up. Some of it needed correcting. And at least one important safety warning was missing entirely.
News Americas went through the peer-reviewed literature behind each claim. Here’s the real story behind the foods our grandmothers already knew were good for us – and the numbers worth knowing before you believe everything you see online.
Christophine (Chayote) – The Telomere Claim Checks Out
The viral claim: christophine “slows telomere shortening – the biological clock inside every one of your cells,” citing a 2023 study.
The verdict: Real, and genuinely interesting. A 2023 randomized controlled trial published in the journal Redox Report, conducted at Mexico’s National Autonomous University, gave 48 older adults with metabolic syndrome either 1.5g/day of chayote or a placebo for six months. The placebo group’s telomeres shortened over that period; the chayote group’s did not.
It’s a real, peer-reviewed finding – but a small, first-of-its-kind study in a specific population (older adults with metabolic syndrome), using a concentrated supplement dose rather than a typical dinner portion. It’s genuine early science, not a settled fact. Christophine remains extremely low in calories (19 per 100g) and rich in folate, vitamin C, and antioxidants regardless.
Breadfruit – A Rare “Complete Protein,” With A Catch
The viral claim: breadfruit is “one of the only fruits with complete protein, complex carbs, omega-3 and rich in fibre.”
The verdict: Mostly confirmed, one addition dropped. Multiple peer-reviewed studies, including a 2015 paper in the journal Amino Acids, confirm breadfruit contains all nine essential amino acids – a genuinely rare quality among plant foods, most of which are missing one or more. It’s particularly rich in leucine, isoleucine, phenylalanine, and valine.
The catch: breadfruit’s total protein content is low, roughly 1-2.4g per 100g. “Complete protein” describes the quality of what’s there, not the quantity – it’s a valuable complement to other protein sources, not a replacement for them. We also found no supporting evidence for the omega-3 claim in the nutrition literature and have left it out.
Canna Edulis – The 90% Claim Was Inflated
The viral claim: toloman is “over 90% resistant starch” and “too rare to be in nutrition databases.”
The verdict: Corrected. The second half is true – toloman genuinely isn’t in standard databases like the USDA’s, reflecting how rare and regionally specific this root remains. But the “90%+” resistant starch figure doesn’t hold up against the research. Whole dried canna edulis rhizome is about 70-80% total starch – not specifically resistant starch. Laboratory studies show specially processed preparations (using techniques like repeated cooking-and-cooling cycles) can reach 40-60% resistant starch content, genuinely high, but well short of 90%, and only after specific processing most home cooks aren’t doing.
Cassava – What The Viral Post Left Out Entirely
The viral claim: cassava is rich in resistant starch, gluten-free, and good for gut health. No safety warning was included.
The verdict: Benefits confirmed – but an important warning is missing. Cassava does become high in resistant starch when boiled and cooled, and its fiber, vitamin C, and manganese content are well documented. But raw or improperly prepared cassava contains cyanogenic glycosides – compounds that release cyanide when the root is cut, crushed, or eaten raw. This is well-established science, not a fringe concern: food safety authorities in Australia and New Zealand require labeling on cassava products for this exact reason.
The safe preparation, confirmed across multiple sources: always peel cassava completely, and cook it thoroughly (boiling for at least 15-30 minutes is effective). Never eat it raw, and never drink raw cassava juice. Combining peeling, soaking, and thorough cooking is safer than relying on any single step.
Sweet Potato – The Okinawa Connection Is Real
The viral claim: purple sweet potato is the food of Okinawa’s Blue Zone centenarians, “that tells you everything.”
The verdict: Confirmed, with one honest caveat. This one is genuinely well-documented – the purple sweet potato (beni imo) made up roughly 60% of daily caloric intake for Okinawan centenarians through much of the 20th century, and it’s higher in antioxidants (anthocyanins) than blueberries.
The honest caveat researchers themselves emphasize: it wasn’t one miracle food. It worked within a whole lifestyle – a mostly plant-based diet, eating until 80% full (“hara hachi bu”), daily movement, and strong social connection. The sweet potato is real evidence, not magic.
Yam, Pigeon Peas, And Green Banana – The Numbers Hold Up
We checked the specific figures for these three against USDA and peer-reviewed nutrition data, and they’re solid:
- Yam: glycemic index in the 50-60 range depending on variety and preparation, rich in potassium, vitamin C, and fiber – all confirmed.
- Pigeon peas: GI of 22 (an exact match to USDA data), roughly 121 calories and strong protein/fiber content per 100g – genuinely good source of both plant protein and fiber.
- Green banana: GI around 30, roughly 89-90 calories per 100g boiled, high in resistant starch, potassium, and vitamin B6 – all confirmed.
Air Potato – Real Medicine, Real Caution
The viral claim: air potato is anti-inflammatory, used in Ayurvedic medicine, but some varieties are toxic raw.
The verdict: Confirmed, including the warning. Air potato (Dioscorea bulbifera) genuinely has centuries of documented use across Chinese, West African, and Indian Ayurvedic medicine, with real anti-inflammatory and antioxidant compounds identified in peer-reviewed research. The toxicity warning is also accurate: raw bulbils contain alkaloids that can be mildly toxic if eaten fresh in quantity, and proper cooking is necessary. This was the one food on the original list where the safety warning was actually included and accurate — worth noting as the standard the rest of the list should have met.
The Bottom Line
Nine of the ten claims we checked held up reasonably well, once properly scoped. One figure was meaningfully inflated. And one important safety warning – cassava’s cyanide risk – was missing entirely from a post that got the same warning right for a different food just slides later.
The real lesson isn’t that Caribbean grandmothers were wrong about these foods. Overwhelmingly, the peer-reviewed science backs up what they already knew. The lesson is that even health content with real science behind it is worth a second look before you share it – because the difference between “70-80% starch” and “over 90% resistant starch” is the difference between accurate information and a viral exaggeration.
