One of the early signs of protein deficiency is a prolonged decrease in energy and fatigue. Protein is one of the important sources of energy for the body. When the body does not get enough protein, the energy levels will decrease, causing unusual fatigue even after getting enough rest. This condition can affect productivity and quality of daily life.

Protein is the main component that forms muscles. Protein deficiency can cause a decrease in muscle mass (muscle atrophy) and overall muscle weakness. This can be seen from long-lasting physical weakness despite regularly engaging in physical activities. The decrease in muscle mass not only affects physical appearance but also body strength and stamina.

Protein is very important in the healing and recovery process of the body after injury or illness. Protein deficiency can hinder the healing process and prolong the recovery time from injury or illness. This is because protein is needed to repair damaged tissues and support the immune system. Without sufficient protein intake, the body cannot perform these functions optimally.

Skin, hair, and nails health are greatly influenced by protein intake. Protein deficiency can cause various problems such as dry skin, brittle hair, and easily broken or cracked nails. Hair loss is also one important sign of protein deficiency that needs to be watched out for. These conditions indicate that the body is not getting enough nutrients to maintain the health of these tissues.

Protein helps maintain fluid balance in the body. Protein deficiency can cause fluid accumulation in the body tissues, leading to swelling in the legs, hands, or abdomen (edema).