Consuming flaxseeds as long as you prefer will not significantly affect your case of ketosis. If you eat them in the morning, afterward, you will know you might have healthy fats in your system because you've consumed the seeds in the morning. Eating following the flaxseeds at night may slow the digestive process, after which your body will use the energy while you sleep. Though eating should not exceed two hours, it is crucial to prevent the flaxseeds from being whole so that your body can easily digest them.