Science

Walnuts:

https://www.bbcgoodfood.com/howto/guide/health-benefits-walnuts
https://academic.oup.com/jn/article/144/4/561S/4571638

Pumpkin Seeds:

Data from Dr Sarah Schenker. Registered Dietitian and nutritionist.

Oats:

https://www.ncbi.nlm.nih.gov/pubmed/23182171
https://www.ncbi.nlm.nih.gov/pubmed/19674492
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3710027/

Sunflower seeds: (cancer fighting)

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4073179/
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4726178/
https://www.ncbi.nlm.nih.gov/pubmed/20133068/
https://wiki.cancer.org.au/policy/Position_statement_-_Selenium

Chia Seeds:

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6073254/

Almonds:

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3898316/figure/fig2/
https://www.healthline.com/nutrition/9-proven-benefits-of-almonds#section4
https://www.ncbi.nlm.nih.gov/pubmed/2024929
https://www.ncbi.nlm.nih.gov/pubmed/24084509
https://www.ncbi.nlm.nih.gov/pubmed/24416351
https://www.ncbi.nlm.nih.gov/pubmed/15466943

Flax Seeds (Linseed)

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4310837/
https://www.medicalnewstoday.com/articles/263405#benefits-
https://www.mayoclinic.org/healthy-lifestyle/nutrition-and-healthy-eating/expert-answers/flaxseed/faq-20058354

Fibre Flakes:

https://www.bbc.co.uk/news/health-46827426