Supplement with exogenous BHB (prioritizing L‑BHB)
Bikman strongly favors exogenous ketones for someone who wants the cardiovascular benefits without the rigor of a strict ketogenic diet. He notes that the pivotal human study that showed 2.7 L/min cardiac output increase used pure L‑BHB, and he underscores that endogenous production of L‑BHB is negligible. Thus, achieving the serum levels needed to replicate those findings almost certainly requires supplementation. He then mentions that he personally sources his exogenous ketones from cleanformnutrition.com, which offers a product line that can raise BHB (including L‑BHB).
Supplies D‑ and especially L‑BHB, which acts on vascular smooth muscle and endothelial cells (potassium channels, NO) to cause vasodilation; also engages NLRP3 inhibition, HDAC inhibition, and other signaling pathways.
I personally get exogenous ketones from cleanformnutrition.com and they've given me a discount code Ben10 for 10% off.
If you're interested in LBHB, you've really got to focus on exogenous ketones. Your own production of LBH is… very modest.