Protein keeps you full longer — without it, you’ll feel hungry shortly after meals.
Not enough protein can cause your body to break down muscle tissue, leading to weakness and reduced strength.
Protein is essential for tissue repair, so cuts and injuries take longer to heal when you're low.
Protein is a building block for hair and nails — a deficiency often leads to hair loss and fragile nails.
A weak immune system is a red flag — protein helps produce antibodies that fight off illness.
Low protein levels can disrupt fluid balance, causing swelling in your hands, feet, and face.
Protein helps regulate neurotransmitters — without enough, you might feel irritable, anxious, or mentally foggy.