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 Continuation of original AfC discussion 

 Thank you for putting inline citation into the lead. 
 Primary sources are discouraged by the guideline delineated on WP:MEDRS. The rational behind this is discussed in detail on that page. This policy is the result of a period of evolution after several years of community discussion. If you disagree with that policy, the correct place to raise your concerns would be on the talk page for the guideline. While that guideline stands however, please let me assure you that the primary sources need to be removed, and if possible replaced with reliable secondary and tertiary sources. If no replacement sources are available, then the content is not notable [yet] for wikipedia. This does not mean that the content is irrelevant on a wider stage (e.g. in scientific circles), but Wikipedia has guidelines for what is notable enough for inclusion in the encyclopedia entries. I include a brief sweep to move the discussion forwards below. Main issues appear to be 1. primary sources, 2. WP:MEDDATE, 3. otherwise unreliable sources 4. possible conflict of interest (?). Many thanks,  (talk) 

 Hirt M, Nobel S, Barron E (2000) Zinc nasal gel for the treatment of common cold symptoms: a double-blind, placebo-controlled trial. Ear Nose Throat J 79:778-82 primary source
 Mossad SB (2003) Effect of zincum gluconicum nasal gel on the duration and symptom severity of the common cold in otherwise healthy adults. QJM 96:35-43 primary source
 Pories WJ, et al. (1967) Acceleration of healing with zinc sulfate. Ann Surg 165:432-6 primary source, WP:MEDDATE issue
 Simkin PA (1976) Oral zinc sulphate in rheumatoid arthritis. Lancet 2:539-42  primary source, MEDDATE issue
 Samman S, Roberts DC (1987) The effect of zinc supplements on plasma zinc and copper levels and the reported symptoms in healthy volunteers. Med J Aust 146:246-9 primary source, MEDDATE issue
 Forman WB, et al. (1990) Zinc abusean unsuspected cause of sideroblastic anemia. West J Med 152:190-2 Case report, MEDDATE issue
 Fiske DN, et al. (1994) Zinc-induced sideroblastic anemia: report of a case, review of the literature, and description of the hematologic syndrome. Am J Hematol. 46:147-50 Case report, MEDDATE issue
 Eby GA, Davis DR, Halcomb WW (1984) Reduction in duration of common cold by zinc gluconate lozenges in a double-blind study. Antimicrob Agents Chemother 25:20-4 primary source, MEDDATE issue
 Godfrey JC (1988) Zinc for the common cold. Antimicrob Agents Chemother 32:605-6 although not a primary source, this is a bit old, and also it is a letter to the editor, it is better to use review papers.
 Eby GA (1988) Stability constants of zinc complexes affect common cold treatment results. Antimicrob Agents Chemother 32:606-7 as above
 Eby GA (2001) Elimination of efficacy by additives in zinc acetate lozenges for common colds. Clin Infect Dis 32:1520 this appears to be a comment on a previous primary source
 Prasad AS, et al. (2008) Duration and severity of symptoms and levels of plasma interleukin-1 receptor antagonist, soluble tumor necrosis factor receptor, and adhesion molecules in patients with common cold treated with zinc acetate. J Infect Dis 197:795-802 primary source
 Farr BM, Gwaltney JM (1987) The problems of taste in placebo matching: an evaluation of zinc gluconate for the common cold. J Chronic Dis 40:875-9 MEDDATE issue
  Smith DS, et al. (1989) Failure of zinc gluconate in treatment of acute upper respiratory tract infections. Antimicrob Agents Chemother 33:646-8 primary source, MEDDATE issue
 http://coldcure.com/html/zinc-lozenges.html unreliable medical source, self published, promotional, unreferenced, no peer review ... definitely needs to be removed
 Jafek BW, Linschoten MR, Murrow BW (2004) Anosmia after intranasal zinc gluconate use. Am J Rhinol 18:137-41 case report
 Alexander TH, Davidson TM (2006) Intranasal zinc and anosmia: the zinc-induced anosmia syndrome. Laryngoscope 116:217-20 primary source
 Eby G (2012) The mouth-nose biologically closed electric circuit in zinc lozenge therapy of common colds as explanation of rapid therapeutic action. Expert Rev Respir Med 6:251-2 letter to the editor

These souces are likely ok, not sure how others feel:
 Bakar NKA, Taylor DM, Williams DR (1999) The chemical speciation of zinc in human saliva: possible correlation with reduction of the symptoms of the common cold produced by zinc gluconate-containing lozenges. Chemical Speciation and Bioavailability 11:95-101 '''apart from breaching MEDDATE, th