I’m looking for some hair care products like oil/gel/medicines but vfm and home based to delay or counter hair greying, hair loss, preserve thickness or reverse hair thinning etc.
What all products like shampoos, gels, or even oral tablets etc you guys take to control the above factors.
There has always been a debate on the basic coconut oil vs countless costly products vs diet and lifestyle etc.
Hi, back again 
First i could reccomend a blood test to check your vitamins and mineral level(iron,b12, d3,zinc and copper, maybe thyroid), then your genetics (ask parents or grand parents about thier hair loss or balding age if any, and thier hair thickness and greying age).
Im not a doctor, consult one if you have an illness or something you feel isnt nomal
These 2 would be the biggest thing to check and most common.
Next is dont wash your hair (or even wet) for a day and just touch your scalp and feel if its oily or dry, if it has flakes(white colour) or dandruff (yellowish) as both have different solutions.
Things to avoid:
Dont use Hair dryer at hot temps, hair drying is fine if using cold or normal air but never hot, itll be harder to dry without the heat but the heat damages tiur hair alot.
Dont do anything that pulls hair alot, friction is problematic but keep this at bottom as its not major. This includes using a towel and drying your hair by vigorously rubbing it (i hope you imagined what i meant) like normally done. Hair is weak when wet and so its unsafe to cause it harm, dry to with a cold or normal hair/blow dryer then comb, itll also make hair look better.
Oil/shampoo/conditioner/mask etc are smth you dont need to worry much about in comparison to what all i listed above, you can worry about it later. But do make sure ti use conditioner (only on hair not scalp) after shampoo as that is important or else hair becomes much dryer
Different oils have different purposes, people say dont apply oil when u have dandruff, but thats vague. Oils like cocount ofc increase dandruff, but oils like squalane or mct dont as they dont have thr fats dandruff feeds on. Also not everything thay falls from your head is dandruff. It can be dryness. White flakes are formed when hair is too dry and rhrh look like dandruff but just white instead or yellowish, coconut oil is good for them. Its really moisturizing.
Water is important for every type of care you can think of.
I think this much is enough for now, which shampoo, conditioner or oil is much less important than these.
Sadly, someone else’s hair may respond differently to the same products.
I experimented a lot since I have wavy shoulder length hair, I really wanted to like Herbal Essence stuff since they looked so cool.
But what works best for me is Dove. Both shampoo and conditioner. Anything by Dove. It was kind of disappointing but the results are undeniable.
Thick, soft, flowing hair that makes me feel like a Disney princess twice a week.
Biotin supplements help a lot too. Shinier nails, a boost in hair growth everywhere. Take sparingly for that reason.