Mixing huel shakes with supplements isn’t a great idea. Some of them work quite well. Most don’t.
Being aware of your body’s needs as well as your health goals is an excellent way to get the best results for your unique build.
As an aside, if you decide to add supplements to your Huel shakes, keep in mind the ingredients of the powder, the compound’s affect/effect, level of hydration needed to maintain optimal performance/health, and always start with the smallest dose and work your way incrementally up to peak levels.
Be aware of your body’s general reaction and needs.
Talk to a doctor about having complete bloodwork done, checking various levels of hormones, allergies…the works, before starting a workout routine and/or adding supplements.