23 key nutrients including vitamin d,great value for money, from just 8p per day,easy to swallow, 1-a-day broad spectrum multi ,for all teens (13 years+) this is a broad spectrum multi supplying the most important micronutrients at 100% of nrv. it can be taken by all adult age groups and we think it makes a good insurance policy for teenagers (13 years+) and young adults.growing teens and twenties need plenty of nutrients to cope with continued growth, highly active lifestyles and diets which are often based on fast convenience and rushed meals. finding time for fresh fruit and vegetables isn\'t usually a priority for this age group! the a-z multi is a great, lower priced long term product, which contains all the important vitamins and minerals, often at 100% of the nutrient reference value, as well as plenty of iron (14mg) for growing girls and a useful level of antioxidants (a,c and e) for boys.brainb vitamins, zinc and iron which contribute to normal cognitive functionimmunityzinc, selenium, vitamin c and vitamin d which contributes to the normal function of the immune system and healthy inflammatory response.energyiron, b vitamins and magnesium for the reduction of tiredness and fatigueskinvitamin c, zinc, vitamin b2, selenium and biotin which contributes to the maintenance of normal skin and mucous membranesvisionzinc, vitamin b2 and vitamin a which contributes to the maintenance of normal visionheartvitamin d, vitamin k and vitamin b1 for normal cardiac functio