A sea anemone does not rely on the adaptive immune memory that humans use to fight viruses. Instead, researchers have found that when a virus invades its cells, the anemone deploys a chemical defence that isolates the infected area and blocks replication, all without triggering the destructive inflammation that often accompanies severe human infections. The mechanism, identified in laboratory studies on the starlet sea anemone, does not destroy the viral genome directly but prevents the pathogen from spreading, a strategy that Italian scientists describe as a potential template for a new class of antiviral therapies. Separately, a team at the University of Ferrara has shown that an extract of whole Pacific oyster tissue—sourced from the roughly 30–40% of farmed oysters discarded for being too small or misshapen—can calm inflammation in human gut cells and tighten the intestinal barrier. In vitro, the extract halved the activity of inflammatory genes and preserved the smooth, intact cell lining that is compromised in conditions such as leaky gut. The work is a proof of concept; animal and human trials are the next milestone.

Dietary interventions, too, are yielding measurable effects. A 12-week Japanese trial involving 48 overweight men aged 50–60 found that those who consumed a daily probiotic yogurt, received nutritional counselling and walked regularly experienced a 2.2% slowing of biological ageing, as measured by a DNA-methylation clock. The benefit could not be attributed to the yogurt alone, but the combination of changes was linked to a modest deceleration independent of weight loss. Meanwhile, a systematic review and meta-analysis of 17 studies, published in BMJ Nutrition, Prevention & Health, concludes that guava juice raises haemoglobin levels by an average of 1.71 g/dL in adolescent girls and pregnant women. The effect is not from the fruit’s own iron content but from its high vitamin C, which converts plant-based non-heme iron into a form the body absorbs more readily. The analysis suggests the juice works best when paired with iron-rich foods or supplements, not as a standalone treatment.

A broader sweep of nutritional research reinforces the value of small, practical adjustments. Dietitians note that adding half a cup each of lentils and quinoa to a standard cup of white rice in a rice cooker can lift the protein content of a serving to 44 grams and fibre to 30 grams, without sacrificing the familiar texture. For those seeking to increase fibre, artichoke hearts, green peas, Brussels sprouts and raspberries all outstrip broccoli’s roughly 2–3 grams per cup. And while cooking is often assumed to improve digestibility, red bell peppers and spinach retain more vitamin C and folate when eaten raw, provided they are washed thoroughly.

Nature continues to supply more fundamental surprises. The tree snail, a tiny mollusc that lives on rain-soaked bark, can make the patterns on its shell vanish when wet, turning a uniform dark brown that mimics wet tree trunks and confuses bird predators. The camouflage is purely optical, triggered by moisture altering the shell’s light-reflecting properties, and it reverses as the shell dries. Biologists see in such adaptations a low-energy, environment-sensing defence that may inspire new materials. For the oyster extract, the next step is to test safety and efficacy in living organisms; for the anemone’s antiviral strategy, the path leads towards isolating the active molecules and understanding their behaviour in mammals.