Reading the ingredients list, the multi-peptide serum seems gimmicky. I'd totally go for the scalp stuff, though! My favourite cleansing conditioner(not by The Ordinary) has AHA, allantoin, and niacin and I wouldn't change it for any other.
My favourite scalp care ingredients(apart from natural oils and EOs) are AHAs, niacin, niacinamide, allantoin, and hyaluronic acid.
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