
I don't know about the horseradish, but the apple cider vinegar and onion works for age spots. Half onion juice and apple cider vinegar. I couldn't be bothered squeezing the onion so I just cut the onion up what I thought was half the ACV and used each night and morning. It was amassed over 8 weeks and it slowly disappeared.
Apple Cider Vinegar, Horseradish

I detailed boats for 14 years and with all of the chemicals I used I caused major havoc on my skin, and I became so depressed as I had aged so badly. Ugly brown spots and horrid wrinkles all over my face . I tried the expensive and the cheap face creams until I ran out of money. and like the commercial I definitely had a wrinkle cream grave drawer. I went through my grandmothers trunks and found her home remedies.
This is what I did:
Fresh lemon juice-ACV- and the horseradish. All equal parts . (it will be a tad milky with some foam, ), I put a very warm wet cloth on my face and neck for a couple of minutes to open up my pores and then apply my mixture and go to bed. This takes a couple of days and the results are wonderful. My skin has improved 75% and I am going to keep on using this, this is working for me and I am very happy with the results I am seeing. The smell is not too bad but your spouse or partner may not agree, but there is always the couch for them to sleep on...