Onions & Garlic

Actually, I'm a Tibetan Buddhist, not a Hindu, but our dietary recommendations for practicing Kriya tantras are almost identical. So I decided that I'd have a better chance of getting an adequate answer here rather than in r/Buddhism which is occupied by people with very secular views. So onions and garlic, are we advised against eating them fresh or absolutely in any form? I'm asking this because you can find onion or garlic powder in industrially produced food where you wouldn't expect to find them at all. It's a bit tedious to read all the ingredient lists. 😬 What is your take on this?