Collagen is the body's most abundant protein, the structural scaffolding of skin, tendons and other tissue, and at least 28 types exist. Supplements promise to replace what ageing erodes, but swallowed collagen is broken down in digestion into smaller pieces, so it is not delivered intact to your face or knees. Some trials report better skin hydration or elasticity, yet a 2025 review of 23 trials found the apparent benefit vanished when only higher-quality or non-industry-funded studies were counted. Collagen creams fare no better: the molecules are too large to pass through intact skin, so they mostly work as moisturisers.

Hampi is a UNESCO World Heritage Site in Karnataka, India, with more than 1,600 surviving remains spread over 4,100 hectares. It was the capital of the Vijayanagara Empire from 1336 to 1565. Travellers from Persia and Portugal described it as a prosperous, wealthy and grand city with temples, markets and farms along the Tungabhadra River. By 1500 it was estimated to be the world's second-largest city after Beijing, and probably India's richest at the time. In 1565 a coalition of Muslim sultanates defeated the Vijayanagara Empire, its capital was conquered and destroyed, and the city was left in ruins. Hampi remains a religious centre, with the active Virupaksha Temple at its heart.