only the highest quality b vitamins are used,convenient one-a-day, coated tablets , the uk\'s strongest and safe for short term use,made in the uk to gmp standardsthis is the strongest b complex that is available in the uk, and we recommend this product is best taken for short periods of 2-3 months, during periods of convalescence, or as a quick boost to your b vitamin intake. after this period you should change to our b 50 complex, our multi b complex, or choose one of our multis such as multiguard® which has high b vitamin levels. our b-100 complex combines choline and inositol to round off this high strength b formula. if you are wondering if a b complex is what you need then this product will leave you in no doubt, (although the same could be said for our b50 complex), which is why nutritionists sometimes recommend a product of this strength.as with all our products, these tablets are made in the uk to strict gmp standards using the highest quality b vitamins available. vitamin b-100 is suitable for vegetarians and vegans.