Holistic Wellness 4 Me

10/23/2026

You can create fiber inside food that didn't have it before. The trigger is temperature.

When you cook starchy food, water enters the starch granules and the long amylose and amylopectin chains unfold. This is gelatinization, and it's why hot rice, hot pasta, and hot mashed potato are so easy for your body to digest. The chains are loose, exposed, and your digestive enzymes break them down within minutes. Your blood sugar rises fast.

When you cool that same cooked starch, the chains do something interesting. They realign and partially recrystallize into a tightly ordered structure called retrograded starch. Your digestive enzymes can't break the crystals as efficiently. The starch reaches your colon largely intact, where your gut bacteria ferment it into short-chain fatty acids including butyrate. Resistant starch is especially butyrogenic compared to other fibers. The FDA and AOAC classify retrograded starch (resistant starch type 3) as dietary fiber for nutrition labeling purposes. Same molecule. Different physical structure. Different physiology.
The numbers across foods:

White rice (Sonia et al., 2015, Asia Pacific Journal of Clinical Nutrition). Researchers measured resistant starch in three preparations: freshly cooked, cooked and cooled at room temperature for 10 hours, and cooked and refrigerated at 4°C for 24 hours then reheated. Resistant starch went from 0.64 g per 100 g (fresh) to 1.30 g (room temp cooled) to 1.65 g (refrigerated and reheated). The clinical follow-up was a randomized crossover in 15 healthy adults. The cooled-and-reheated rice produced a meaningfully lower glucose response than the freshly cooked rice. Same calories, same ingredients.

Potato (Larder et al., 2018, Food Research International). Boiled potatoes cooled for 24 hours at 4°C had up to 114% more resistant starch than potatoes cooled for one hour at room temperature. The exact magnitude varies by cultivar.

Pasta (Hodges et al., 2019, Foods). Randomized crossover comparing freshly cooked pasta, cold pasta, and reheated pasta. Reheated pasta produced a smaller and faster-resolving glucose curve than freshly cooked pasta. The mechanism is the same starch retrogradation that happens in rice and potato.

A few honest caveats. First, "your enzymes can't break the crystals" is a simplification. Pancreatic amylase has reduced activity against retrograded starch but isn't blocked entirely. Some still gets digested. The functional shift is meaningful, not absolute. Second, the magnitude of the cooling effect varies by food, by cultivar, by cooking method, and by cooling time and temperature. Longer cooling at lower temperatures (24 hours at 4°C beats 10 hours at room temperature) produces more retrogradation. Third, repeated extreme reheating can partially reverse retrogradation, but normal microwave or stovetop reheating does not.

Practical implication. If you eat rice, pasta, or potatoes regularly, cooking a batch and refrigerating overnight before reheating roughly doubles the resistant starch content of the same food. Your post-meal glucose response is lower. Your colon gets more butyrate. The fiber on the nutrition label is what was in the raw ingredients. The fiber you actually consume depends on how you cooked and stored the food before eating it.
Same food. Different temperature history. Different physiology.

Sonia et al., Asia Pacific Journal of Clinical Nutrition, 2015
Hodges et al., Foods, 2019
Larder et al., Food Research International, 2018

10/22/2026

10/22/2026

A map shows where PFOA and PFOS have been found in U.S. drinking water as concerns continue over toxic “forever chemicals.”

10/21/2026

10/21/2026

There’s no clean rain left. Not anywhere.

Scientists at Stockholm University tested rainwater across the planet and found PFAS, the forever chemicals that basically never break down. Even in Antarctica. The Tibetan Plateau too.

One of them, PFOA, showed up in rain at levels above the US EPA’s drinking water advisories everywhere they looked.

This stuff came from nonstick pans, waterproof jackets and firefighting foam. Now it’s cycling through the sky, with no real way to scrub it out.

Their verdict was blunt. We’ve crossed a planetary boundary for PFAS.

That water butt in the garden isn’t quite as pure as it looks.

10/20/2026

USDA tested more than 1,300 potato samples from 2022 to 2024. According to an analysis by the Environmental Working Group (EWG), 90 percent of them had residue of chlorpropham, a chemical used to keep stored potatoes from sprouting.

Chlorpropham goes on potatoes after harvest, while they sit in storage. EPA describes it as "a plant growth regulator used for sprout control on post-harvest stored potatoes." Most of the potato samples USDA tested were grown in the US.

Europe went the other way. In 2019 the European Union did not renew its approval of chlorpropham, and its use there had to end by October 8, 2020 at the latest. Europe still allows a tiny leftover amount, 0.2 parts per million, because potatoes kept in storage buildings where it was used for years can still pick up traces of it. The US limit for potatoes is 30 parts per million, 150 times higher than Europe's current leftover limit.

Why it matters: in animal studies, the main effects were on the thyroid and the blood. EPA's review reported that "changes in thyroid function and morphology were prominent effects of treatment" in a study in dogs. EWG says regulators found "changes in blood cells and harm to the thyroid as the primary toxicological effects." EWG also says the average amount found is twice the amount EPA used when it last assessed the chemical, in 2017.

To be fair: the average amount found was nearly 3 parts per million, about a tenth of the US limit, and 21 percent of samples were over 5 ppm, according to EWG. EWG reports that EPA found children were the most exposed age group, but their exposure "did not exceed the agency's level of concern." The thyroid effects in animals came at high doses, and EWG says no peer reviewed studies have looked at the effects of chlorpropham exposure in people. USDA washed and scrubbed the potatoes before testing. The US limit covers an approved use, while Europe's 0.2 is a temporary limit for leftover traces, so the two numbers are not set for the same purpose. In 2020, Europe's food safety agency reviewed temporary limits higher than today's 0.2 and said the intake from these leftover traces "is unlikely to present a risk to consumer health."

What you can do: scrub potatoes under running water, but know that USDA scrubbed these samples and still found it. EWG says peeling can reduce chlorpropham levels, though it may also reduce nutritional value. Under USDA organic rules, organic potatoes cannot be treated with chlorpropham, though EWG says USDA still found small traces on 12 of 28 organic samples, likely picked up in storage.

Sources: EWG, Shopper's Guide to Pesticides in Produce, potatoes page, updated March 24, 2026. USDA AMS Pesticide Data Program annual summaries, 2022, 2023 and 2024. EPA, Chlorpropham Reregistration Eligibility Decision, 1996. EPA, Chlorpropham Tolerance Reassessment Eligibility Decision (TRED), 2002. Commission Implementing Regulation (EU) 2019/989. Commission Regulation (EU) 2025/1163. US Code of Federal Regulations, 40 CFR 180.181 and 7 CFR 205.105 and 205.601. EFSA, Reasoned opinion on the setting of temporary maximum residue levels for chlorpropham in potatoes, 2020.

10/18/2026

Scientists have unlocked the secret to natural eye repair by removing a single protein that blocks the retina from regenerating.

For decades, medical science operated on the assumption that mammalian eyes could not repair themselves once vision loss occurred. Unlike zebrafish or amphibians, human retinas lack the innate ability to regrow damaged cells, rendering conditions like macular degeneration and glaucoma largely irreversible.

However, researchers have identified a key biological obstacle preventing this natural repair process: a protein named PROX1 that acts as a strict molecular stop sign inside retinal support cells.

By developing a targeted therapy to neutralize this protein, scientists successfully prompted mouse retinas to reprogram their own cells and naturally rebuild light-sensing tissue.

The intervention led to long-term vision recovery, proving that the cellular machinery for eye regeneration was merely dormant rather than lost. This breakthrough marks a monumental shift in ophthalmology, offering real hope that future treatments could actively restore sight rather than simply slowing down its decay.

source: Kim, M., Lee, E. J., & Kim, J. W. PROX1 inhibition restores vision through retinal neural regeneration. Nature Communications.