CDXC ChromaDex Corporation

FORM 4 [ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).         
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES                                                                                   
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940                       

1. Name and Address of Reporting Person * BLOCK STEPHEN A	2. Issuer Name and Ticker or Trading Symbol ChromaDex Corp. [ CDXC ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director                    _____ 10% Owner _____ Officer (give title below)    _____ Other (specify below)
(Last)          (First)          (Middle) 10900 WILSHIRE BLVD. SUITE 600	3. Date of Earliest Transaction (MM/DD/YYYY) 3/15/2021
(Street) LOS ANGELES, CA 90024 (City)        (State)        (Zip)	4. If Amendment, Date Original Filed (MM/DD/YYYY)	6. Individual or Joint/Group Filing (Check Applicable Line) _X _ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security (Instr. 3)	2. Trans. Date	2A. Deemed Execution Date, if any	3. Trans. Code (Instr. 8)		4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	3/15/2021		M		32500	A	$1.92	49167	D
Common Stock	3/15/2021		S		32500	D	$11.15 (1)	16667	D
Common Stock	3/16/2021		M		20000	A	$2.605	36667	D
Common Stock	3/16/2021		S		20000	D	$13.17 (2)	16667	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Trans. Date	3A. Deemed Execution Date, if any	4. Trans. Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Options (right to buy)	$1.92	3/15/2021		M			32500	9/28/2012 (3)	8/27/2022	Common Stock	32500	$0	0	D
Stock Options (right to buy)	$2.605	3/16/2021		M			20000	11/16/2017 (4)	11/15/2026	Common Stock	20000	$0	0	D

Explanation of Responses:
(1)	The weighted average sale price for the transaction reported was $11.15, and the range of prices were between $11.10 and $11.25. Upon request by the SEC staff, the issuer, or any security holder of the issuer, full information regarding the number of shares sold at each separate price will be provided.
(2)	The weighted average sale price for the transaction reported was $13.17, and the range of prices were between $13.10 and $13.34. Upon request by the SEC staff, the issuer, or any security holder of the issuer, full information regarding the number of shares sold at each separate price will be provided.
(3)	The Options were granted on August 28, 2012 and vested 1/12th monthly from the grant date.
(4)	The options were granted on November 16, 2016 and 100% vested on November 16, 2017.

Reporting Owners
Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
BLOCK STEPHEN A 10900 WILSHIRE BLVD. SUITE 600 LOS ANGELES, CA 90024	X

Signatures
/s/ Jeong James Lee, Attorney-in-Fact		3/17/2021
**Signature of Reporting Person		Date