The theory of nucleosynthesis involves several uncertainties and it is interesting to see whether interstellar cold fusion could provide mechanisms allowing improved understanding of the observed abundances. There are several problems: D abundance is too low unless one assumes the presence of dark matter/energy during Big Bang nucleosynthesis (BBN); there are two Lithium anomalies; there is evidence for the synthesis of boron during BBN; for large redshifts the observed metallic abundances are lower than predicted. The observed abundances of light nuclei are higher than predicted and require that so called cosmic ray spallation producing them via nuclear fission induced by cosmic rays. The understanding of abundances of nuclei heavier than Fe require supernova nucleosynthesis: the problem is that supernova 1987A did not provide support for the r-process.
The idea of dark cold fusion could be taken more seriously if it helped to improve the recent view about nucleosynthesis. In and additional section to the article Cold fusion again I try to develop a systematic view about how cold fusion could help in these problems. I take as a starting point the earlier model for cold dark fusion discussed in the above link and also in blog postings: see this, this, and this. This model could be seen as generalization of supernova nucleosynthesis in which dark variant of neutron and proton capture gives rise to more massive isotopes. Also a variant allowing the capture of dark alpha particle can be considered. Besides this pure standard physcis modification of Big Bang nucleosynthesis is proposed based on the resonant alpha capture of 7Li allowing to produce more Boron and perhaps explain second Li anomaly.