I can for sure help you control! LP(a) and antithrombin deficiency. That said, would like to get an idea of what you eat daily and drink to get a clear picture.As for Lipoprotein (a), what is your current number sitting at, and is it measured in mmol/L or mg/dL. In lowering Lp(a) is a long process and it could take anywhere between 1 to 3 years to lower it… using therapeutic levels of Niacin flush version and Vitamin E. now as for the dose it does varies, but would like to know a bit more about your health and blood work as well. Do you have the following blood tests done? Lp(a), Apo B, Apo A, Fibrinogen, Homocysteine, HS-CRP, IGF-1, ALT, AST, GGT. How is your liver functioning overall and kidneys? If you are going to start using niacin, will have to start with 500mg for the initial 10 days and start working up to therapeutic levels. Reaching possibly up to 3 to 8g , but it’s all based on your lifestyle and Blood Work that would like to see, as we need to keep an eye on homocysteine levels not exceed 9. As if we do exceed that level, than Vitamin B6, Folate, B12, will have to be added. As for the Antithrombin, is fixed with niacin, vitamin e, magnesium, and garlic extract.