1. FAT AND OUR FOOD

2. Crystals of coconut butter BIGPICTUREEDUCATION.COM Polarised light micrograph of crystals of coconut butter. Coconut butter or oil is a mixture of mainly saturated fats but does include some monounsaturated and polyunsaturated fats too. There is currently debate around whether eating coconut oil is harmful or beneficial to cardiovascular health and cholesterol levels. Credit: Spike Walker/Wellcome Images

3. Acorns Acorns are the nuts or seeds of an oak tree. They are high in fat as they contain energy stores to support a plant to grow. With the correct preparation, acorns can be eaten by humans. In general, seeds and nuts contain healthy fats.. Credit: Spike Walker/Wellcome Images

4. Chocolate honeycomb A scanning electron micrograph showing the interior of chocolate confectionery. This image has been coloured to represent the crunchy honeycomb interior and the chocolate coating. Chocolate products are high in saturated fats and are unhealthy if eaten in large quantities regularly. Credit: Specious Reasons, Flickr BIGPICTUREEDUCATION.COM

5. False-coloured scanning electron micrograph of a chip. Its structure no longer has the fractal-like pattern seen in raw potato. Instead if forms triangular shapes joined together with deeply grooved and shrivelled surfaces. Credit: Karen Gustafson/Wellcome Images BIGPICTUREEDUCATION.COM SEM of a chip

6. Slimming capsule Illustration of a slimming capsule. Slimming medications often work by reducing appetite, by altering the way fat is digested and absorbed by the body, or by increasing the energy expenditure of the body. Some slimming pills can have dangerous, even lethal, effects, so it’s important they are only taken on the advice of a medical professional. Credit: Spooky Pooka/Wellcome Images BIGPICTUREEDUCATION.COM

7. Fast-food van A fast-food van parked in Machynlleth, Powys, Wales. Increased access to fast food, in large part because of the spread of multinational fast-food chains, has helped fuel the rising levels of obesity in many parts of the world. Credit: Max Blundson/Wellcome Images BIGPICTUREEDUCATION.COM

8. Mothers feeding their babies Exclusive Exclusive breastfeeding is the ideal way to nourish a baby from birth to six months, but after that, sometimes breast milk alone cannot provide all of the necessary nutrients. If so, complementary foods can be added to the child’s diet, these mothers are doing. Credit: N Durrell Mckenna/Wellcome Images BIGPICTUREEDUCATION.COM

9. Skin-fold measurement A male athlete having a skin-fold measurement at the British Olympic Medical Centre. Skin-fold thickness is measured with special callipers on several parts of the body to estimate the percentage of body fat. Credit: Wellcome Images BIGPICTUREEDUCATION.COM

10. Reusing our images Images and illustrations All images, unless otherwise indicated, are from Wellcome Images. Contemporary images are free to use for educational purposes (they have a Creative Commons Attribution, Non-commercial, No derivatives licence). Please make sure you credit them as we have done on the site; the format is ‘Creator’s name, Wellcome Images’.Creative Commons Attribution, Non-commercial, No derivatives licence Historical images have a Creative Commons Attribution 4.0 licence: they’re free to use in any way as long as they’re credited to ‘Wellcome Library, London’.Creative Commons Attribution 4.0 licence Flickr images that we have used have a Creative Commons Attribution 4.0 licence, meaning we – and you – are free to use in any way as long as the original owner is credited.Creative Commons Attribution 4.0 licence Cartoon illustrations are © Glen McBeth. We commission Glen to produce these illustrations for ‘Big Picture’. He is happy for teachers and students to use his illustrations in a classroom setting, but for other uses, permission must be sought. We source other images from photo libraries such as Science Photo Library, Corbis and iStock and will acknowledge in an image’s credit if this is the case. We do not hold the rights to these images, so if you would like to reproduce them, you will need to contact the photo library directly. If you’re unsure about whether you can use or republish a piece of content, just get in touch with us at bigpicture@wellcome.ac.uk.bigpicture@wellcome.ac.uk