Clean blood vessels! There are some options to clean the artery and lest of blood vessels. Those could be medicines like statins or fibrates and could be delicious dietary choices that may help support your blood vessels. To improve cardiovascular health and reduce the risk of plaque buildup and inflammation, which can lead to conditions like atherosclerosis, these foods can be the right choices.

Onions
Onions are remarkably helpful in reducing fat. A spicy emulsified propylallin in onions reduces triglycerides and cholesterols and also lowers blood sugar levels. In 10 trials with 446 participants in total, a meta-analysis suggested that onion supplementation improves HDL and LDL levels and affects triglycerides slightly(1). This analysis showed a significant reduction in total cholesterol levels.
Onions have antioxidant properties due to the many chemical compounds such as quercetin in onions’ skins. Quercetin itself strengthens capillaries and arteries to resist oxidative stresses. Through a rat study in 2013, scientists concluded that long-term intake of quercetin-rich onions could protect against hyperactivation of thrombosis by modulating blood coagulation (2). It helps to prevent form blood clots and makes blood flow a whole lot more smoothly.

Green veges
Green vegetables such as spinach, cabbage, and kale are rich in vitamins, minerals, and nitrates. They are also effective in preventing hyperlipidemia and improving blood flow and blood vessel health. Dietary fiber, abundant in green veges, increases the amount of feces, and drains fat components into the intestine and finally gets that out of the body.
The metabolic pathway to lower blood cholesterol homeostasis is well-studied in many types of research. Cholestyramine, chitosan, and cellulose are probably the most exciting examples of fibers to improve cholesterol levels. The serum cholesterol levels in a control group of mice fed a high-fat diet increased double than any of these fiber diets (3). The hypocholesterolemic activity through eating fiber-rich foods depletes cholesterols in liver tissues through decreasing absorption efficiency and increasing excretion of cholesterols.
In addition to green vegetables, unpeeled brown rice and oats are also rich in dietary fiber. Consuming 20 to 25 g of dietary fiber per day is appropriate.

Greasy fish
Why don’t we mention omega-3 fatty acids for blood vessels? Oily fish like mackerel and sardines are the most helpful. Sources like fatty fish (salmon, mackerel, trout), flaxseeds, chia seeds, and walnuts contain omega-3 fatty acids that have anti-inflammatory properties and can reduce the risk of atherosclerosis. With anti-inflammatory and antioxidant effects, Omega-3 fatty acids raise high-density cholesterol lipoproteins (HDL), which is good for the heart and blood flow. HDL particles, the protein cargo proteomes, play a key role in regulating bad cholesterol levels in the blood vessels.
These unsaturated acids from marine origin have been strongly associated with cardiovascular protection. The hypotriglyceridemic effect of omega-3 is a major biological property in cardioprotective actions. And consuming daily omega-3 could decrease the risk of arrhythmia susceptibility. Recent outcomes of an omega-3 study resulted in a 19% reduction in unhealthy events with the administration of EPA 1.8g daily, and this benefit was observed in patients with normal triglyceride levels (4).

Hyperlipidemia is a disease in which various fat components such as cholesterol accumulate in blood vessels. Fatty foods such as chicken tend to lead to obesity due to their high calories, and there is a high risk of hyperlipidemia. If you want to remove fat accumulated in your blood vessels, improving your usual diet is effective. 

References
1) Wang Huang, Gang Tang, Linyu Zhang, Jie Tao, Zhengqiang Wei. Effect of onion on blood lipid profile: A meta-analysis of randomized controlled trials. Food Sci Nutr. 2021;9:3563–3572.
2) Seung-Min Lee a, Jiyoung Moon b, Ji Hyung Chung c, Yong-Jun Cha d, Min-Jeong Shin b. Effect of quercetin-rich onion peel extracts on arterial thrombosis in rats. Food and Chemical Toxicology. Volume 57, July 2013, Pages 99-105.
3) Ariëtte M. van Benneku. Mechanisms of cholesterol-lowering effects of dietary insoluble fibres: relationships with intestinal and hepatic cholesterol parameters. British Journal of Nutrition (2005), 94, 331–337.
4) Saito Y, Yokoyama M, Origasa H, et al. Effects of EPA on coronary artery disease in hypercholesterolemic patients with multiple risk factors: sub-analysis of primary prevention cases from the Japan EPA lipid intervention study (JELIS). Atherosclerosis. 2008; 200: 135-140.

Abstract
Clean the blood vessels! To improve heart and blood vessels health, you need to take these.
Onions. Onions are remarkably helpful in reducing fat. A spicy emulsified propylallin in onions reduces triglycerides and cholesterols and also lowers blood sugar levels. Onions have antioxidant properties due to the many chemical compounds such as quercetin in onions’ skins. Quercetin itself strengthens capillaries and arteries to resist oxidative stresses.
Green vegetables Rich in vitamins, minerals, and nitrates, green veges are always the right choices. Abundunt dietary fiber increases the amount of feces, and drains fat components into the intestine and finally gets that out of the body. Cholestyramine, chitosan, and cellulose are probably the most exciting examples of fibers to improve cholesterol levels. 
Greasy fish Sources like fatty fish contain omega-3 fatty acids that have anti-inflammatory properties and can reduce the risk of atherosclerosis. With anti-inflammatory and antioxidant effects, Omega-3 fatty acids raise HDL particles, the protein cargo proteomes, which play a key role in regulating bad cholesterol levels in the blood vessels. The hypotriglyceridemic effect of omega-3 is a major biological property in cardioprotective actions.