Conclusion
Vitamin B6 can be gotten from either foods or supplements. You can get adequate vitamin B6 with the right diet, however, if it would be taken from supplements, it should be under the supervision of a doctor. Too much vitamin B6 from supplements is not good and can lead to nerve damage over time. This is why it is important that you consult your doctor before using these supplements.
References:
[1] https://lpi.oregonstate.edu/mic/vitamins/vitamin-B6
[2] https://www.ncbi.nlm.nih.gov/pubmed/18838531
[3] https://www.ncbi.nlm.nih.gov/pubmed/19920848
[4] https://www.ncbi.nlm.nih.gov/pubmed/2558186
[5] https://www.diclegis.com/en/
[6] https://www.ncbi.nlm.nih.gov/pubmed/7573262
[7] https://www.ncbi.nlm.nih.gov/pubmed/10683000
[8] https://www.healthline.com/nutrition/eye-vitamins