A recent study published in PLOS showed a healthy heart reduces dementia in a cohort of about 1500 Finish people. Improvements in heart health in midlife reduced dementia risk. It was the latest study finding people with better cardiovascular health metrics scores in midlife had a significantly lower risk of late-life dementia.
More than 5 million adults aged 65 years and older in the United States are predicted to have dementia, with projected increases to nearly 14 million people by 2050. In Australia, it affects about 1 in 15 over the age of 65. The cost is more than $15 billion and costs about $35,000 per sufferer.  It is not a “normal” part of aging. Lifestyle makes a big difference.
Severe cognitive dysfunction involving difficulties with memory, recognition, language, decision making, attention, and problem-solving accompanies dementia. This can interfere with a person’s daily functioning.
The Healthy Heart Reduces Dementia Study
Dementia is a long term disease and this cohort study included 1,449 participants from the Finnish Cardiovascular Risk Factors, Aging, and Dementia (CAIDE) study, who were followed from midlife (baseline from1972 to 1987; mean age 50.4 years; 62.1% female) to late life (1998), and then 744 dementia-free survivors were followed further into late life (2005 to 2008). (30 year study)
The dementia rate was about 3.8% over a 20-year cumulative incidence for a healthy heart regime. If you had an unhealthy profile the risk of increase of dementia by about 3 times (to 9% over those 20 years)
Some lifelong modifiable risk factors identified in epidemiological studies, including cardiovascular risk factors from mid to late life, play a crucial role in the onset and progression of dementia. Seaweed reduces blood pressure and decreases heart inflammation in animal studies.
In fact, simulation research estimates that up to 35% of dementia cases may be due to modifiable risk factors across the life span. These risk factors include social and mental health factors such as education, social engagement, hearing loss, and depression.
Epidemiological studies also show the importance of cardiovascular health in the prevention of dementia. Factors such as smoking, diabetes, heart failure, atrial fibrillation, high blood pressure, obesity, and high cholesterol are all associated with an increased risk of dementia.
The American Heart Association’s (AHA) has 7 cardiovascular health metrics and four are behavioral:
- physical activity
- body weight
Three components are biological:
- blood cholesterol
- blood pressure
- blood glucose
Scientists have associated having ideal cardiovascular health metrics in midlife with a reduced incidence of dementia in later life.
Seaweed Reduces Dementia
In animal studies seaweed reduces dementia – but the translation from lab to human use is not direct. However there is enough evidence that the models are sound. This study concluded a healthy heart reduces dementia and there is data that seaweed reduces hypertension and diabetes – both major risk factor to dementia.
 Liang Y, Ngandu T, Laatikainen T, Soininen H, Tuomilehto J, Kivipelto M, et al. (2020) Cardiovascular health metrics from mid- to late-life and risk of dementia: A population-based cohort study in Finland. PLoS Med 17(12): e1003474. https://doi.org/10.1371/journal.pmed.1003474
  Wanyonyi, S; du Preez, R; Brown, L; Paul, N; Panchal, S 2017 Kappaphycus alvarezii as a Food Supplement Prevents Diet-Induced Metabolic Syndrome in Rats. Nutrients (9) 11 DOI:10.3390/nu9111261 (Click for Abstract) (Click to download full paper)
 Bogie, J et al (Including Monique Mulder) 2019 Dietary Sargassum fusiforme improves memory and reduces amyloid plaque load in an Alzheimer’s disease mouse model. Scientific Reports 9 (1) DOI 10.1038/s41598-019-41399-4 (Click for Abstract) (Click to download full paper)
 Dementia – an overview. Healthdirec facts https://www.healthdirect.gov.au/dementia-overview