Yes, it’s common for some loose skin or mild wrinkles to appear under the chin after weight loss, especially if the skin has lost elasticity with age. Regular neck exercises, good hydration, sunscreen, and gentle moisturizers can help improve firmness and slow further aging

If you’re not technically overweight, it might be harder to get a prescription through a traditional provider. It’s probably best to discuss your goals with your primary care doctor and see what they recommend

It could be the protein powder or the overall increase in protein from your diet since your body might be adjusting to more protein than usual. Some vegan proteins like pea or soy can cause bloating or digestive urgency for certain people, and adding extra yogurt or cottage cheese might contribute as well. You could try pausing the powder for a few days to see if your symptoms improve and keep track of what you eat and how you feel. Tools and wellness platforms like this https://betterme.world/articles/7-wellness-challenge-platforms/ can help you notice patterns and manage your diet more effectively.