5 signs your protein intake is too low — that have nothing to do with muscle size

You get sick more often than you should

Immunoglobulins, complement proteins and the cytokines that coordinate immune responses are all synthesised from amino acids. Chronic low protein intake compromises immune function in ways that are not obvious until the pattern becomes clear: more frequent colds, longer recovery from illness, and a general vulnerability to infections that peers without these deficits do not share. Active individuals have higher amino acid turnover and therefore higher protein requirements for immune maintenance.

Wounds and cuts heal slowly

Wound healing is a protein-intensive process. Collagen synthesis — the primary structural component of healed tissue — requires glycine, proline and hydroxyproline in quantities that a marginal protein intake cannot always supply. Athletes who notice that minor cuts, abrasions or muscle injuries take longer than expected to heal may be experiencing a protein-driven delay in tissue repair rather than a medical issue.

Your mood is worse and concentration is harder

Neurotransmitters including serotonin, dopamine and norepinephrine are synthesised from amino acid precursors. Tryptophan is the precursor to serotonin. Tyrosine is the precursor to dopamine and norepinephrine. A diet consistently low in these amino acids can blunt neurotransmitter production in ways that manifest as reduced motivation, flat mood and difficulty concentrating — symptoms frequently attributed to stress or burnout rather than nutrition.

Your hair is thinner than it was

Hair is primarily keratin — a structural protein. Hair follicle cells are among the most metabolically active in the body and among the first to be deprioritised when amino acid availability is restricted. Gradual diffuse hair thinning — not patterned hair loss, which has hormonal rather than nutritional causes — can be an early signal of chronic insufficient protein intake, particularly in women or individuals with restrictive dietary patterns.

You are always hungry, even after eating

Protein is the most satiating macronutrient per calorie. Meals low in protein but adequate in carbohydrate and fat tend to produce hunger faster and more intensely than protein-containing meals of equivalent caloric content. Persistent hunger despite eating enough calories — the feeling that meals do not quite satisfy — is often a protein signal that is instead attributed to willpower issues or metabolism.

How much is actually enough for active people

The commonly cited recommended daily allowance of 0.8g per kilogram of bodyweight was set to prevent deficiency in sedentary adults — not to optimise performance or health in active individuals. Research consistently supports intakes of 1.6 to 2.2g/kg for athletes. For a 70kg active adult, this means 112 to 154g daily. Most people significantly overestimate how much protein is in their diet.

The practical fix

Distributing protein intake across meals — rather than concentrating it in a single large meal — produces better muscle protein synthesis outcomes and reduces hunger across the day. Targeting 25 to 40g of high-quality protein per meal, three to four times daily, is the most evidence-backed practical framework. For training days when appetite is suppressed post-session, a fast-mixing, well-tolerated protein like Keforma's Whey Plus 80 removes the friction from hitting these targets.