PK never uses the title Dr, but he is a Fellow of the Institute of Trichologists (FIT) which is the longest established professional association for trichologists. It's a recognised as a branch of dermatology which specialises in the study of hair and scalp. Some are also doctors but it isn't a requirement. Trichologists are registered health care professionals (having an NVQ in hairdressing isn't sufficient). Membership of the Institute of Trichologists have an obligation to pursue CPD (continued professional development). I don't have a problem with him not being a fully qualified MD, any more than a dentist is but you'd trust a dentist to sell you a decent toothpaste and advise you on dental matters.
I understand why you look at PK, with his wirey orange hair and aren't sold on trying his products but I suspect he knows more than John Barrowman , Lulu, Judith Williams, Liz Earle or even my GP about follicles.
Back to Franks: she's so easily caught out telling porkies or exaggerating because to tell lies you need to be smart enough to remember what you made up previously, and she isn't. She's vehemently (look it up Jill) stated during a PK show that she only uses PK No Scent No Colour shampoo (when she really needs the Itchy Scalp one) but then she'll be on with Ojon a week later saying she can't live without their products. QVC probably think that only we weirdos on this forum monitor their presenters' statements so closely and with only a slight chance anyone will report then to the ASA it's a small risk, but they should remind them to stick to the facts not fabrication (no not polyester Jill).