Sea buckthorn oil is rich in various vitamins, minerals and beneficial plant compounds The seeds and leaves are also particularly rich in quercetin, a flavonoid. Whats more, its berries boast potassium, calcium, magnesium, iron and phosphorus. They also contain good amounts of folate, biotin and vitamins B1, B2, B6, C and E More than half of the fat found in sea buckthorn oil is mono- and polyunsaturated fat, which are two types of healthy fats. Interestingly, sea buckthorn oil may also be one of the only plant foods known to provide all four omega fatty acids omega-3, omega-6, omega-7 and omega-9