As an agony aunt, I know the biggest cause of unhappiness: other people. Here’s the secret to better relationships

Looking back through her post bag, Observer Magazine’s Philippa Perry answers her readers most commonly asked question: why are other people so awful?

The kindness of strangers: I had a fear of flying – and as the plane shook and plummeted, she held my hand

We gripped each other tightly for 75 minutes, her lost in anguish, me in a state of panic

Stuck in the middle: advice on bringing up babies and caring for your parents

Believe it or not, you know more about babies than you think – and try to have fun with your mum and dad. Advice from the experts for the ‘sandwich generation’

Winter running gear: our top training essentials to help you conquer the cold

Bundle up and break a sweat with these winter running accessories, from base layers and gloves to waterproof jackets

‘Resolutionaries’ v gym rats: why fitness fanatics hate the crowded gyms of January

At the start of the year, many people embark on a new workout programme – leaving regular exercisers longing for Quitter’s Day

66 days to quit Pepsi Max: ‘Of course, there is a lot of misery’

From four cans a day to zero. Can Jackson Ryan last more than nine weeks without his favourite sugar-free cola?

Move body and mind: five exercises to improve mental health, from twists to lunges

Combining ideas from therapy with physical activity can bring huge health benefits, say the therapists pioneering a holistic approach

‘Spit not rinse’: how I tested 20 electric toothbrushes (and became a toothbrushing pro)

This week: what we learned testing toothbrushes; fitness kit worth the investment; and slow cookers for warming winter feasts

Is it true that … wearing suncream in the winter slows signs of ageing?

We sift through mixed-messaging about sun protection factor creams, UV light, skincare and vitamin D

Robert F Kennedy Jr claims seed oils are ‘poisoning’ us. Here’s why he’s wrong

Like a host of online influencers, the man likely to be the US’s next health secretary has denounced the vegetable oils used in countless foods. The science is not on their side