I’ve noticed that you’ve said that hair loss could be accelerated by an insufficiently balanced diet.
Would it be advisable to take multivitamins to ‘cover up’ any deficiencies in my diet?
Perhaps you read something out of context. Please point me to this post you are referring to.
In general, if you live in a civilized world and have a normal diet, I do not believe you need extra supplements for hair growth or to treat hair loss. I realize many people take these supplements and vitamins, so the choice is up to you. Certainly, taking vitamins has no downside and may have an upside even if you are not deficient. Vitamins like E and D are sometimes low in regular diets and if there is little sun exposure, taking Vitamin D may have value.