I think the nutrients in the different variants of Horlicks vary. Women's Horlicks will have nutrients that are more suitable for women's needs. Kid's Horlicks has more calcium and vitamins and minerals needed for growth. The proportion of the nutrition in each type of Horlicks is different. There is a difference in the taste as well. Horlicks meant for children is available in flavours that kids prefer.
It is all a marketing gimmick. I think a healthy diet can provide better nutrients than any supplement. The problem is we do not eat a balanced diet, especially kids, who are generally picky eaters.
"A love affair with knowledge will never end in heartbreak" - Michael Garrett Marino
'Idhuvum Kadandhu Pogum "
Even this challenging situation would ease
No life without Sun
There is another item I have seen. One is "Fair and lovely" for women. "Fair and handsome' for gents. I fail to understand the difference, except marketing gimmicks.