The Healthspan Map · Nutrition (Ch9-10)
Cook real food
Compiled by Aamir Malik, PhD, Professor of Neuroengineering at Brno University of Technology, from published studies. He is a researcher, not a physician. Last updated 21 August 2026.
What this is linked to
| Condition or system | Direction | Strength | Evidence type | What was found | Source |
|---|---|---|---|---|---|
| Anemia | Do this | Emerging | Review / narrative | Cooking whole foods (including in cast-iron) supports dietary iron intake. | Cooking (incl. cast-iron) & iron (opens in a new tab) |
| Anxiety | Do this | Emerging | RCT / meta-analysis | Higher ultra-processed intake is associated with greater anxiety (OR 1.48) and mental-disorder symptoms. | Lane et al. 2022 (opens in a new tab) |
| Balance & falls risk | Do this | Emerging | Review / narrative | Regular home-cooked meals underpin the protein/nutrient intake that protects muscle and balance. | Protein/omega-3/vitD & muscle-function review (PMC6116139) (opens in a new tab) |
| Chronic fatigue / low energy | Do this | Emerging | Review / narrative | Home-cooked meals underpin the diet quality tied to lower fatigue. | Nutritional status & fatigue review (PMC7071235) (opens in a new tab) |
| Depression / low mood | Do this | Emerging | RCT / meta-analysis | Higher ultra-processed intake is associated with greater depression risk (OR 1.44; prospective HR 1.22). | Lane et al. 2022 (opens in a new tab) |
| Digestive discomfort | Do this | Moderate | RCT / trial | Cooking from whole ingredients cuts exposure to emulsifiers/additives linked to GI symptoms. | Home cooking avoids additives (opens in a new tab) |
| High blood pressure | Do this | Moderate | Review / narrative | Most dietary sodium comes from processed and restaurant food, so cooking real food is the main way to cut salt. | Dietary/PA approaches to BP (opens in a new tab) |
| High cholesterol / dyslipidemia | Do this | Moderate | Review / narrative | Cooking real food lets you swap saturated fats for unsaturated oils, the key dietary lever for LDL. | Lifestyle & lipids (Endotext) (opens in a new tab) |
| Obesity / weight gain | Do this | Moderate | RCT / trial | Cooking minimally-processed meals lowers energy density and eating rate, reducing calorie intake compared with ultra-processed food. | Hall et al. 2019, Cell Metabolism (opens in a new tab) |
| Peripheral neuropathy | Do this | Emerging | RCT / meta-analysis | Cooking real food supports glycemic control and reduces the refined carbs that burden nerves. | Glucose & nerve damage (opens in a new tab) |
| Reproductive & sexual health | Do this | Emerging | Review / narrative | Home-cooked whole-food meals underpin the Mediterranean/fertility pattern and reduce ultra-processed and packaging-related exposures. | Diet & male infertility (PMC7291266) (opens in a new tab) |
| Respiratory infections & airway health | Do this | Emerging | Review / narrative | Home-cooked whole-food meals underpin the micronutrient adequacy that supports airway immune defence. | Multivitamin-mineral & respiratory infection (PMC12310427) (opens in a new tab) |
| Skin, hair, nails & wound healing | Do this | Moderate | Review / narrative | Water-based cooking (vs high-heat browning) lowers preformed dietary AGEs that damage skin collagen. | "Diet and Skin Aging - From the Perspective of Food Nutrition", Nutrients 2020 (opens in a new tab) |
| Sleep-disordered breathing | Do this | Emerging | Cohort / observational | Home-cooked whole-food patterns underpin the Mediterranean/weight-loss diets that improve OSA. | OSA & obesity review (PMC10876414) (opens in a new tab) |
| Stress | Do this | Emerging | RCT / meta-analysis | Higher ultra-processed intake is associated with greater perceived stress and common mental-disorder symptoms; whole-food patterns are protective. | Lane et al. 2022 (ultra-processed food & mental health) (opens in a new tab) |
| Type 2 diabetes & metabolic syndrome | Do this | Moderate | RCT / meta-analysis | Cooking real food instead of ultra-processed products cuts refined starch, added sugar and additives linked to diabetes. | Ultra-processed food & T2D meta (opens in a new tab) |
| Vision problems | Do this | Emerging | Review / narrative | Home-cooked whole-food patterns underpin the Mediterranean/low-glycemic diets tied to lower AMD risk. | Modifiable lifestyle & AMD review (PMC11946629) (opens in a new tab) |
| Weak immunity & chronic inflammation | Do this | Moderate | Review / narrative | Cooking from whole ingredients cuts ultra-processed additives linked to inflammation. | Home cooking avoids additives (opens in a new tab) |
| Liver, Kidney & Urinary | Do this | Emerging | Review / narrative | Home-cooked whole foods cut the sodium and ultra-processed load that burdens the kidneys and liver. | Proteins & specific diets in CKD (PMC7999704) (opens in a new tab) |
The Healthspan Map is part of Fix the Floor, a book by Aamir Malik. About the book