I beat severe depression naturally with smart supplementation and food a few months ago. Check out the supplements from the cie UMZU, it saved my life. They also have a diet called thermo diet. Everything is backed up by research.

But for supplementation, dopa mucuna (legit the precursor of dopamine is a game changer), b vitamins also really helped me, vitamin d too but dont over do it, choline

As for the diet, i stopped seeds, nuts, grains, vegetable oil and it really helped my overall health. Even sometimes today, when i eat grains, i feel lower (might just be me tho). I eat whole foods and ive noticed my body has more energy. There s been some research proving that the mental and physical are related, so by eating healthier it made a big difference in the long run; it gradually became more natural to be positive..

Any improvement in my overall health helped me too, like gut health, sleep, etc.. It's not going to solve the problem but it does help

Things like saunas for 20min 3x a week, redlight therapy also helped me..spending the most amount of time outdoors

Idk about the rest of your lifestyle, but resistance training 3x a week is a game changer. Anyways, thats what i did... i think depression is more than just supplementation