Cooking with Broccoli. Cooking methods can impact the nutrient content and health benefits of broccoli. Boiling can leach up to 90% of the valuable nutrients from broccoli, while steaming, roasting, stir-frying, and microwaving tends to preserve the nutrients. History of Broccoli
a meta analysis is a statistical analysis that combines the results of multiple scientific studies
1 Combine the results. This is the process of combining all of the findings, sometimes qualitatively, but usually quantitatively, using meta-analysis.  Publish the results. As with any research, the results have to be written and published, usually with a system of independent review.