★★★★★
I took borax for my broken bones and noticed a similar thing. The urge to nibble my nails was dramatically reduced. It felt like my nails were stronger, but that couldn't possibly have happened so fast (in hours).
In any case, breaking my wrist was the start of six months of great nails. I relapsed eventually. But in the years since I have tried a borax supplement again and the effect is repeatable. I suspect strontium helps too.
Once or twice a year I mix 10g of Borax in a 1 litre bottle and store it in the fridge. I drink about 20-30ml a day with a touch of vinegar to neutralize the alkalinity. It was an effective dose of ~300mg borax (so ~30mg boron). After a month or so I lose the drive to keep doing it, so take a break. I tried for years taking 3mg boron supplements of sort and never noticed anything.
Borax
★★★★★
I had soft, splitting, cracking, peeling and later ridged nails for years. Two months ago I started with Boron in the form of BORAX, 1/8th of a tsp in a liter of water a day for the problem with my bones in my feet. Well my foot problems are gone and my nails are beautiful and strong. I also take a number of food supplements like ACV, BS, ground flax seed, molasses, Brewers yeast, Lecithin and extra calcium/magnesium plus other vitamins but nothing has worked like Borax... I should say I am now taking it only 4 days a week as recommended on this site. I hope this helps you the way it did me.
