In reply to a couple of comments by @iwafs:
Their comment that "i will repeat that smelling of BO or dog is better than the poison in laundry boosters. And make no mistake, it is poison. Anyone who voluntarily ingests it is foolish."
To ingest is to eat: I strongly suggest you don't eat scent boosters.
I am a certified cosmetic chemist and have worked in the perfume industry for 25yrs (that doesn't mean I'm an industry shill).
To another of your points: It's impossible to buy totally unscented soap, as all soap bases smell disgusting (fatty, of the base oil they're saponified from. The worst I ever smelled was a russian soap base made from fish oils - we had to work really hard to cover that base odour!)
The lavender, vanilla etc. essential oils that you buy in shops, markets etc, are diluted with the exact same chemicals you worry about in your 'synthetic' products. They are also major components in these synthetic products, as many natural oils are comparatively cheap: citrus oils in particular.
The strong smell of Lush is purely from natural fragrances, yet many find it less bearable than synthetics (I don't, but must admit it's strong).
Also, a PP mentioned allergy to fragrance mix: all the ingredients in this, are from natural essential oils (clove, cinnamon, etc) and the 26 common allergens that must be legally listed on the packs of cosmetics & household products are all naturally occurring in essential oils. So in many cases natural is more harmful than synthetic. (edited for typos)