the yellow one was happy, and I liked the women in the images, but they need to be older, fatter, and maybe, in groups, like... they have friends, and fun? more... dove branding, or the current boots TV advert. they both hit the spot.
But, the white writing on the yellow background: I can't read that. Black, maybe? Then I could see it.
The blue one... all very medical. rubber gloves. nah. It's not medicine, is it, it's... powdered egg (looking at you, leucine!)
and the final one... ugg boots, and beigey-pink. nah. Boring.
Is this product aimed at a specific demographic? I assume, collagen, leucine, protein: you want menopausal women with poor eyesight and slightly saggy faces. They're the target market... so... vote yellow. but fatter wiminz, wearing spectacles.