public SupplementItemViewModel AddSupplementItem(SuplementDTO supplement = null)
        {
            var item = new SuplementItemDTO();

            item.Suplement       = supplement;
            item.Time.DateTime   = DateTime.Now;
            item.SuplementsEntry = Entry;
            Entry.Items.Add(item);
            var viewModel = new SupplementItemViewModel(item);

            _supplements.Add(viewModel);
            return(viewModel);
        }