Is one can sodium-free tuna, 1 boiled egg, 1strawberry, 4blackberries, 13 blueberries, and handful almonds a healthy breakfast helping weight loss?

Breakfast. Yes!all the items here are healthy and of low glycemic index, an ideal breakfast.Well done!
Sounds OK. Those foods are all part of a healthy diet. The most important thing is to make sure that the calories you take IN are less than the calories you expend during the day. That is really the only way weight loss can occur. There is a good website to track your calories and exercise: www.myfitnesspal.com.