Spirulina ( Arthrospira platensis ) is a photosynthetic cyanobacterium. It is often referred to as a blue-green microalgae due to its characteristics and uses, which are similar to those of microalgae. It has attracted growing interest for its applications in the food and pharmaceutical industries and gained even greater visibility when it was used as a nutritional supplement in space missions. Spirulina is well known for its nutritional profile and is used both as a food supplement and as an ingredient in a variety of products. Its composition includes around 60%-70% protein by dry weight, as well as carbohydrates, essential fatty acids, vitamins, minerals, and several bioactive compounds. Among these are phycocyanin, chlorophyll, carotenoids, and phenolic compounds, substances associated with antioxidant and anti-inflammatory properties. Some research suggests that spirulina consumption may contribute to reducing oxidative stress , modulating the immune system , and improving certain metabolic markers , such as blood glucose levels and lipid profile. In addition to its nutritional value, spirulina also offers environmental advantages , as its cultivation requires less water and land than many traditional protein sources. Available in several forms, spirulina can be easily incorporated into the daily diet: Powder : can be added directly to smoothies, juices, or yoghurts, or used as an ingredient in recipes such as pancakes. Tablets and capsules : are an option for those who wish to supplement their diet without altering the taste of foods. Spirulina is also found in a range of foods and beverages, including snacks, pasta, biscuits, dairy products, and energy bars , which help mask its distinctive flavour and aroma that may affect consumer acceptance. However, although spirulina is generally considered safe, supplementation should not be started without medical advice , particularly in the following groups: Pregnant or breastfeeding women; People with phenylketonuria; People with autoimmune diseases; People taking anticoagulants, diabetes medication, or medication for high blood pressure; Immunocompromised individuals; People with a history of allergies. Some individuals may also experience side effects associated with spirulina supplementation, such as headaches, bloating, gas, and diarrhea. If spirulina is a suitable supplement option for you, try these recipes created by our nutritionists , Alexandra Lima , Liliana Natário e Tatiana Gonçalves , which offer simple and tasty ways to enjoy its potential benefits. Meet the nutrition clinical team from Hospital da Luz network.
