These can be bought in Sweden at ÖoB, maybe even online. 

+ nourish your hair with Omega-3 fatty acids. 

- high doses can reduce the body's ability to fight infections. 

I have not tried them because just by opening the lid, it stinks! These was given to me but for another purpose than haircare. I can't see myself taking them because the capsules are quit big for me that has a problem swallowing pills. Especially when they taste and smell bad as *%!~.. 

Have you used fish oil topically or orally for hair or health care? 

21st Century Biotin ( high potency biotin 800mcg): 1 daily, 110 tablets ( 10% extra in this one). 

This one is bought from iHerb.com

 The shipping is free to USA, for Sweden I think it's about $4 and the shipping is pretty fast. 

+ hair loss can be reduced.

- can cause breakouts on body and face ( I did not know that at that time). 

I tried  1 bottle but I will not continue to take these. The tablets are small and easy to swallow which is a plus. It's also very affordable. 

My thought was to start with a lower dose to then go higher, I have seen some people starting with 5,000mcg but that's up to yourself. 

A short time after my skin started to break out, not a lot but I don't break out like that and I noticed that my face got shinier especially on my t-zone. At that point I was drinking less water than I do today which can be one reason why it made me break out. 

My nails and hair got stronger and my nails grew fast but my hair didn't grow any faster. 

I didn't notice any side effects after I stopped using it. Biotin on its own is a no no for me. 

Do you or have you used any supplement to grow your hair stronger, healthier or faster?