Randomization and blinding
A total of 100 participants were randomized to receive either L‐Carnosine or placebo after initial screening was completed and informed consent obtained. Allocation to treatment arm was randomly assigned in a 1:1 ratio by an independent researcher using random numbers generated. A computerized random number generator was used for the generation of randomization codes using permuted block randomization technique. The placebo tablet was not distinguishable in appearance (shape, size, color, and taste) from L‐Carnosine so as to conceal treatment allocation and blinding. Treating clinicians were also blinded to group allocation to ensure that trial treatment did not influence clinical care. All data, including biological samples, were kept in a secure location under appropriate storage conditions. The patients, rater, research assistant, laboratory assistants, and statisticians remained blinded throughout the entire trial. Table 