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Paul Osei-Owusu

Ageing

How Bilingualism Affects Ageing and Cognitive Health

Bilingualism affects ageing through cognitive reserve, the brain's capacity to cope with damage before symptoms appear. Lifelong use of two languages is linked to sharper executive function and dementia symptoms surfacing 3 to 5 years later. However, the link does not hold in every group. Practical language strategies and the public health case follow.
Supplements

Making Sense of Collagen Peptides

Collagen peptides sell on a simple idea: the body is full of collagen, so swallowing more should help to replace it. This evidence-led guide follows a scoop from tub to bloodstream, then weighs the research on joint pain, tendons, muscle, bone, and skin; explains why findings disagree; and shows what the evidence says about dose and safety.
Supplements

Are You Taking Too Many Supplements?

Taking too many supplements is rarely about the number of bottles. One product can hold eight active ingredients, and a single daily dose can reach a safe upper limit. This evidence-led guide explains when several supplements meet a real need, when they add little, how they clash with medicines, and how to review your collection.
Weight Management

How Do Wegovy, Ozempic and Mounjaro Work?

Wegovy, Ozempic and Mounjaro are household names, yet the three brands contain only two medicines. Semaglutide copies one gut hormone at different doses, while Tirzepatide copies two at once. Licences and NHS rules then decide what each brand is for and who receives it. Outside trials, average weight loss is smaller than headline figures suggest.
Diet

Does Eating 30 Plants a Week Improve Your Health?

The 30-plant target began with one survey question and a comparison of 85 volunteers. This guide explains what counts toward 30 plants a week and how the gut responds. It weighs the broader health evidence and explains why some people feel worse at first. Simple ways to eat more plants without overcomplicating meals complete the picture.
Ageing

Intrinsic Capacity: What Your Body and Mind Can Do as You Age

Some 80-year-olds compare well with people 50 years younger in physical and mental capacity, while others need help dressing. Intrinsic capacity is the World Health Organization's measure of that difference. It predicts independence, hospital outcomes, and survival, yet scientists disagree on how to score it. The strongest evidence for protecting it comes from studies that target one capacity at a time.
Weight Management

What Are GLP-1 Weight Loss Drugs?

Weight loss drugs such as Wegovy and Mounjaro copy GLP-1, a gut hormone released after meals. They quieten hunger, steady blood sugar and can deliver weight loss approaching surgery. Yet muscle loss, side effects, and regain after stopping shape the real picture. Here is how they work, who they suit and why exercise still matters.
Sleep

Can a Sleep Tracker Tell You If Your Sleep Is Good Enough?

Researchers matched a week of wrist data from 95,559 adults with nearly nine years of hospital records. The results link sleep length, REM sleep, broken nights and irregular sleep with later illness. They also show what a wrist can and cannot measure. Short nights carried most risk, and poor sleep may sometimes signal illness early.
Weight Management

Can Body Recomposition Really Work?

Losing fat while building muscle sounds contradictory, yet trials show it works for beginners, returning trainees, older adults, and experienced lifters. The odds depend on your starting point, the size of your calorie gap, protein intake, progressive training, and sleep. Scales and body scans can also invent changes of their own, so judging real progress needs care.
Medical Conditions

Can Exercise After Cancer Help People Live Longer

Structured exercise has long been valued for easing fatigue during cancer care. Pooled results from 21 randomised trials involving 8,449 adults link it with fewer deaths and less cancer recurrence. The evidence also shows which programmes stood out, how exercise may affect tumours, and why most of the findings come from women with early-stage breast cancer.
High-Intensity Interval (HIIT)

How Long Should a HIIT Workout Be Before the Benefits Stop?

Interval training is sold on saving time, yet published sessions run from under ten minutes to over an hour. Pooled evidence from 69 randomised trials involving 2,387 people identifies where fitness returns stop climbing, what those minutes contain, and why the time saved buys an advantage on one measurement while leaving twelve others unchanged.
Aerobics

What Is Rucking and Does It Work

Walking with weight on your back has moved from military training into ordinary parks and pavements. Adding load makes a walk measurably harder straight away, yet a harder walk and a lasting change are two different things. This piece separates what carrying weight does to the body from what has simply been claimed for it.
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