Flaxseed Oil (same as Linseed Oil) is an approved food additive by the FDA. I use it on all wooden food prep surfaces. Puritan’s Pride is running a Buy 2, Get 3 Free sale right now. I usually get the 16 oz jars shown here: http://www.puritan.com/flaxseed-linseed-oil-080/organic-flaxseed-oil-006420
No, I’m not affiliated with Puritan’s Pride; just passing on the info.