Secular Fasting as a Physical Practice to Gain Physical Benefits

In Colossians 2.18, Paul says, let no one disqualify you insisting on topping off for a soone. But there were false teachers in the church at Colossae that used this word 'top enough' differently and made it part of their pagan practices. Secular fasting as a physical practice to gain physical benefits should not be taken over from Christianity.