Table 3.

Characteristics of the message model for its implementation in SAlBi educa.

	Characteristics	References
Length	160 characters	(51, 52, 54, 55)
Timing	10.00. User-modifiable	(29)
	16.00–18.00 h	(14, 53)
Frequency	1–4 messages/week	(14, 25, 28, 30, 31)
Content:
General nutrition knowledge	Healthy diet and nutritional advice	(6, 8, 25, 26, 28–30, 52)
	Examples of everyday situations of increased risk of unhealthy food consumption and healthy suggestions to avoid it
	Recipes and healthy eating information links
	Information to promote reflection, discussion, and action
	Recommendations for healthy snacks and drinks
	Benefits of fruit and vegetable consumption
	Benefits of increasing fiber consumption
	Reducing sugar consumption
	Information on portion sizes
	Good food choices
Feedback	Weight progress	(14, 26, 53, 56)
	Macronutrient and energy assessment
	Motivational, suggesting healthy alternatives, including nutritional advice and simple concepts
Tone and language	Simple	(14, 26, 54)
	Personalized with the user's name
	Empathetic