Your hair, skin and nails are created from basically the same building blocks. So it is possible to find a vitamin to help make all three healthier at the same time. An easy way to judge your hairs health is by running your fingers through it. If it feels course of rough and if you notice a lot of split ends than it is not healthy.
The way you can tell if your skin is healthy is by feeling it, if is rough and dry, cracking or scaly then it is unhealthy. Healthy hydrated tissue tends to spring back. Health hair has a thick feel and ease of maintenance. Your nails are the easiest if they break easily they are unhealthy, your nails should be strong and tough. If you notice yellowing, cracking or chronic tearing of cuticles and skin around the nails, it could mean a vitamin deficiency.
The reason your skin, hair and nails become weak is due to lack of certain vitamins and minerals the main ones being B 6, 9, 12, A, D and C. These vitamins will do everything from help cells regenerate faster, to repair damaged and fortify weak areas. This is them same concept when it comes to black hair growth vitamins. You can also eat certain foods to get these vitamins as well like:
Shellfish
Meat
Poultry
Liver
Carrots
Broccoli
Catfish
Salmon
Mackerel
Rose Hips
Green Chillis
Red Chillis
Vitamin A is great for hair, it helps keep hair moisturized and sends protein to the nails where it makes them stronger and less likely to break. Vitamin D makes the bulb of your hair more healthy by helping it intake food easier give the hair more nutrition.
Vitamin B does many different things it helps fortify the hair, nails and skin to keep them healthy. Getting plenty of vitamin b will help you battle thinning hair as well. Vitamin C contains antioxidants which help protect your body against environmental damage. Emu oil shampoo and conditioner add emu oil which contains vitamins e as well.
Minerals are also very beneficial for your body as well. Zinc is an antioxidant as well, which helps your skin and muscles develop faster and stay healthier. Iron helps produce amino acids which aid in production of new cells. Calcium helps your body become stronger and more dense.
Vitamins will help your hair grow faster and become stronger. They will help your nails developed harder and grow quickly and help your skin become softer and more radiant.