Dear Karen,

honestly let me ask about / for a bit more detail about your "nano-cellulose" (i. e.: could you - please - define the stuff you mean more properly?):

Do you mean 'microcrystalline cellulose-powder' [which should be -at least IMHO - originating from natural source(s)] or

do you argue about chemically fabricated nano-cellulose (fibers) like

ethyl- or hydroxypropylmethyl-cellulose (HPMC) which - as of my knowledge - are still used in (micro-)capsule making [e. g. for drug-application] & as fillers .... The only recent publication I am aware of reviewing the properties of "nano-cellulose" (which I was able to find) is:

HARPER et al.(2016):

Impacts of chemical modification on the toxicity of diverse nanocellulose materials to developing zebrafish. publ. in: Cellulose (Lond). 2016 Jun;23(3):1763-1775. Epub 2016 Apr 28, to be found@https://www.ncbi.nlm.nih.gov/pubmed/27468180, or - better - the PDF: @ImArticle Impacts of chemical modification on the toxicity of diverse ...

(ok, this one was created automatically by the RG-System and links automatically to the publication profile of the Authors in ResGate, BUT without a LINK to the FREE ACCESS ARTICLE {"Request FULLTEXT ...." } -

SO, if you want to link to the PDF proper you should use the following URL [do not forget to eliminate the underscore line '_' in between "http _ and _ s://....":

http_s://www.ncbi.nlm.nih.gov/pmc/articles/PMC4959043/pdf/nihms802908.pdf

Thank you in advance, kind regards, WM.

why do you have your conclusion before your evidence?

So, frankly and honestly spoken, dear Karen: So you might be afraid of having or getting so called "Morgellon's Disease"?

For the information and convenience of prospective readers I would like to point to the other question of Karen: cf. @ https://www.researchgate.net/post/Can_nanocellulose_in_food_cause_skin_reactions?