Cookie A Day
Now the Spirit expressly states that in later times some will abandon the faith to follow deceitful spirits and the teachings of demons, 2 influenced by the hypocrisy of liars, whose consciences are seared with a hot iron. 3 They will prohibit marriage and require abstinence from certain foods that God has created to be received with thanksgiving by those who believe and know the truth. 4 For every creation of God is good, and nothing that is received with thanksgiving should be rejected, 5 because it is sanctified by the word of God and prayer. -1 Timothy 4:1-5 BSB
To stay away from certain foods, thinking that we will become more righteous, is to adhere to demonic doctrine. For Christ came to fulfill the law so that the substance of worship is Jesus Christ and not on what we do but on whom we worship.