Dietary supplement

Our nutritional supplements were developed by nutritional therapist Katharina Döricht: short ingredient lists, the most natural sources possible, and independent laboratory testing. Here you will find magnesium bisglycinate, collagen, creatine, Daily Aminos, L-glutamine, plant-based zinc and iron, natural vitamin C, vitamin D3 & K2, B12 and vitamin B complex, Belly Bloom, and Female Balance.

What does "natural sources" mean? For example, zinc from guava leaf, iron from curry leaf, and vitamin C from fruit instead of synthetic ascorbic acid.