Dear @Rian, supplimenting the guidance from Puneet, I wish to clarify the last section of your statement – "VK will use its own wisdom to understand what kind of meditation or spiritual practice is suitable to the person who drinks this serum.." It is most important to know the subject, we are practicing. VK could be considered as a gateway, which emits the most powerful Energies of the Divine. Energies are ‘all inclusive’ and does not require to be categorize its accord with a specific intention. It fulfills wherever and whatever is required to be evoked/activated/balanced.
Our Aura is also an energy field but it is rather a display than an infusion. As you mentioned, the color of the Aura is display of your Inner Space. Intake of SO7R and various positive serums, saves us from Negative aggression as well as clears/balances us from inside. But we should not forget our conscience which produces Negative energies due to our own actions and emotions. This is what our Aura primarily displays. Acting as mirror of ourself, Aura depicts our personality. Therefore, I would suggest that please do not take it as granted that in-spite our karma is maligned, we are safe with VK. Do Good, think positive and align with the Divine are the Vitamins, one should add for the health of our Soul and brighten our Aura.