I seemed to remember a vitamin being mentioned to do with bruising easily so looked on google. This is from an American site.
The reason why most people bruise is that their capillaries are too fragile and essentially are easily torn. One of the best ways to ensure that your capillaries remain strong and flexible is to make sure you have an excellent source of bioflavonoids in your diet. Excellent dietary sources of bioflavonoids include dark-colored berries, dark leafy greens, garlic, and onions.
Typically, a well-rounded diet with plenty of organic vegetables and some fruits will be more than sufficient to provide all the micronutrients you will need to prevent bruising from all but the most severe traumas. However, if you bruise easily, the following nutrients will be especially important and if you're not getting enough of them via your diet a supplement may be useful:
• Rutin
Rutin is a bioflavonoid known to strengthen blood vessels. For this reason, it's often used for varicose veins and hemorrhoids, as well as bruising. In fact, a deficiency of bioflavonoids may allow blood vessels to break easier, which is why, if you bruise easily, you would likely benefit from taking rutin.
In one study of people with progressive pigmented purpura, the skin lesions were completely cleared after four weeks of treatment with a rutin (50 mg twice a day) and vitamin C supplement.3
• Hesperidin
This bioflavonoid, found in citrus peels, is also known for strengthening capillaries. In a study of menopausal women, those who took a daily supplement of hesperidin and vitamin C had reduced bruising.4
• Vitamin C
In people with low vitamin C intake, increasing vitamin C has been found to reduce bruising.5 Taking vitamin C along with bioflavonoids like rutin or hesperidin is recommended, as they may improve vitamin C's effectiveness and absorption.6 As reported by the University of Michigan Health System:7
"Even minor deficiencies of vitamin C and possibly of flavonoids can lead to increased bruising. People who bruise easily may benefit from eating more fruits and vegetables, common sources of vitamin C and flavonoids.
…Reduce your tendency to bruise by taking a daily combination of at least 400 mg of vitamin C and 400 mg of flavonoids, such as hesperidin or rutin."