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Paul Osei-Owusu

Supplements

What Does Psyllium Husk Do?

Psyllium husk is a gel-forming fibre sold for constipation, cholesterol, blood sugar and weight. The evidence does not rate those uses equally. Trials show clear effects on bowel habits and LDL cholesterol, smaller effects that depend on blood sugar control, and disputed results for weight. The gel behind the benefits also explains the rare risks.
Supplements

How L-Theanine Affects the Brain

L-theanine, the amino acid behind tea’s calming reputation, is sold to ease stress, sharpen focus and improve sleep. The research is more specific. Effects appear mainly after a single dose before stress, especially in anxious people, and fade within hours. A cup of tea holds a fraction of a capsule, and caffeine shifts the results.
Diet

The Truth About Brown and White Sugar

Brown sugar often looks like the healthier choice, yet brown and white sugar are mostly the same sucrose. The difference is molasses: kept on, spun off or coated back on. This evidence-led guide follows both sugars from cane and beet to the bloodstream, weighs what a teaspoon supplies and examines what long-term research can separate.
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.
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