5 worst eating habits that harm your skin

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Jan , 18. 12. 2025

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If your facial skin has worsened, the problem may not be only in cosmetics or sleep. What we eat plays a big role. Acne, a grayish skin tone, dark circles under the eyes and a tired expression are often related to poor eating habits. Here are five main culprits and simple tips on how to replace them with healthier choices.

1) Excess sugar – a quick route to wrinkles and acne

Too much sugar contributes to glycation of collagen and elastin, the skin loses elasticity, becomes dull, inflamed pimples and fine wrinkles form. Hidden sugar lurks in soft drinks, flavored yogurts, bars and baked goods.

What to do instead:

  • Replace sweet drinks with water with lemon or unsweetened tea.
  • Have desserts 1–2× per week, not daily; opt for fruit with yogurt.
  • Reduce sugar in recipes by 30–50%, or use dates or stevia.

2) Too much gluten – sensitivity can also show on the skin

For some people, gluten sensitivity can be associated with reddened cheeks, dark spots around the mouth and irritation. It doesn’t apply to everyone, but if you notice a connection, try a short elimination.

What to do instead:

  • Cut out wheat/barley products for 2–4 weeks and monitor your skin.
  • Try rice, buckwheat, quinoa, gluten-free oats and more vegetables.
  • Supplement fiber (legumes, seeds) and drink enough water.

3) Lactose intolerance – a common trigger for chin acne

In adults, reduced lactose tolerance is common. It can manifest as acne on the chin, dark circles under the eyes or eyelid swelling. The quickest test is a temporary elimination of dairy products.

What to do instead:

  • Try 3–4 weeks without lactose (or try lactose-free variants).
  • Replace with lactose-free Greek yogurt, kefir or plant-based drinks.
  • Watch your protein (eggs, fish, legumes) and calcium (poppy seeds, sesame, leafy greens).

4) Excess unhealthy fats – dull, lifeless skin

Fried foods and trans fats worsen the transport of nutrients and oxygen to tissues. The skin is grayish, lacking radiance and regenerates less well.

What to do instead:

  • Swap frying for baking/air-frying; use olive oil and canola oil.
  • Add healthy fats: avocado, nuts, seeds, fatty fish twice a week.
  • Limit fast food and industrial baked goods with substitute fats.

5) Too much coffee and caffeine – stress for the body and skin

More than 2–3 cups a day increase stress load, disrupt sleep and thus the night-time skin renewal. The result is dull, tired-looking skin.

What to do instead:

  • Stick to 1–2 cups a day and choose decaf after 2 p.m.
  • Alternate with water, mint or rooibos tea; pay attention to hydration.
  • Add magnesium from foods (almonds, cocoa, legumes) to better handle stress.

Quick „skin“ meal plan for every day

  • Breakfast: oatmeal with berries and a tablespoon of flaxseed.
  • Lunch: baked salmon, quinoa, leafy salad with olive oil and lemon.
  • Snack: lactose-free plain yogurt + a handful of nuts.
  • Dinner: vegetable curry with chickpeas and whole grain rice.
  • Hydration: 1.5–2 l of water a day; herbal teas, minimal sweetened drinks.

Conclusion

It’s not necessary to ban everything completely. The key is balance: less sugar and processed foods, more fresh vegetables,