Spoilage
If you eat organic produce you know it spoils far more quickly than non-organic. That is because non-organic produce is treated with preservative, waxes and other chemicals. Produce wax can be made with beewax, shellac, carnauba, or petroleum jelly.
Are these harmful to you? Shellac (bug resin), carnauba (plant derivative), beeswax (bees) and petroleum jelly (petroleum byproduct). All of them are insoluble in water and may have an impact on your guts. Again, the science is still out.